Top PDF A taxonomic revision of the Neoserica (sensu lato) calva group (Coleoptera, Scarabaeidae, Sericini)

A taxonomic revision of the Neoserica (sensu lato) calva group (Coleoptera, Scarabaeidae, Sericini)

A taxonomic revision of the Neoserica (sensu lato) calva group (Coleoptera, Scarabaeidae, Sericini)

Legs moderately slender. Femora with two longitudinal rows of setae, inely and sparsely punctate. Metafemur moderately shiny and sparsely inely punctate; ante- rior margin acute, behind anterior margin without serrated line; posterior margin entirely serrated ventrally and moderately widened at apex; posterior margin inely serrated dorsally, glabrous. Metatibia slender and moderately long, widest at apex, ratio of width/length: 1/3.2; dorsal margin moderately carinate, with one group of spines, only; former basal group reduced to a single spine at middle, apical group at three quarters of metatibial length; with a blunt carina beside dorsal margin in basal half bearing a few short robust setae in single robust punctures with serrated margin; external face longitudinally convex, coarsely but sparsely punctate; ventral margin inely serrated, with three robust setae, with the apical one being more distant; me- dial face impunctate, glabrous, apex moderately truncate interiorly near tarsal ar- ticulation. Tarsomeres ventrally with sparse, short setae, not carinate laterally, with ine sparse punctures dorsally; metatarsomeres with a strongly serrated ventral ridge; metatarsomere I as long as following two tarsomeres combined and half of its length longer than dorsal tibial spur. Protibia short, bidentate, not widened laterally before basal tooth; anterior claws symmetrical, basal tooth of inner claw sharply truncate at apex.
Mostrar mais

35 Ler mais

Anatomical studies on twelve clones of Camellia species with reference to their taxonomic significance

Anatomical studies on twelve clones of Camellia species with reference to their taxonomic significance

Anatomical studies of leaf and stem of twelve clones of Camellia were investigated. Cross sections of the stem of all the clones exhibited a typical pattern of arrangement of tissues characteristics of woody plants. Two types of idioblastic sclereids were found in the medullary parenchyma of the taxa studied. While astrosclereids were present in 10 of the twelve clones, the vesciculose sclereids were found only in the four clones belonging to C. sinensis. Leaves of the clones show variations in the number of palisade layers. Astro sclereids, brachy sclereids, and dendritic forms were observed in the leaves, their distribution varying in the different clones. A few other micromorphological features are also recorded. Our study forms a basis for answering uncertainties in taxonomic revision in the genus Camellia.
Mostrar mais

6 Ler mais

A specimen-level phylogenetic analysis and taxonomic revision of Diplodocidae (Dinosauria, Sauropoda)

A specimen-level phylogenetic analysis and taxonomic revision of Diplodocidae (Dinosauria, Sauropoda)

Morphological details. During the study of single specimens, one usually records and describes morphological details unique to the animal, which might or might not be taxonomically significant. If the phylogenetic analysis accompanying the description recovers the new specimen on a separate branch, and thus as a new taxon, these traits are generally interpreted as autapomorphic for the new taxon. The confirmation of such an interpretation can only be made with the discovery of additional specimens of the same species, preserving the same portions of the skeleton. Before that, variation due to any pre- or post-mortem processes (ontogeny, individual variation, sexual dimorphism, or taphonomic deformation) cannot be excluded with certainty as a cause for the morphological disparity found in the fossil. Specimen-based phylogenetic analyses are the only way to test for such variation. As mentioned above, highly homoplastic characters are the most likely to encompass variation seen between individuals in specimen-based phylogenetic analyses. These characters should either be deleted or down-weighted compared to the less variable characters, as is done by implied weighting (Goloboff, 1993). Finally, by scoring single specimens of a species, and thereby detecting individual variation in some characters, researchers create a firmer base for how to score species- or even genus-level OTUs.
Mostrar mais

298 Ler mais

Taxonomic revision and molecular phylogenetics of the Idarnes incertus species-group (Hymenoptera, Agaonidae, Sycophaginae)

Taxonomic revision and molecular phylogenetics of the Idarnes incertus species-group (Hymenoptera, Agaonidae, Sycophaginae)

(http://www.figweb.org—Van Noort & Rasplus, 2016) and as Supplemental Information 1. The electronic version of this article in Portable Document Format (PDF) will represent a published work according to the International Commission on Zoological Nomenclature (ICZN), and hence the new names contained in the electronic version are effectively published under that Code from the electronic edition alone. This published work and the nomenclatural acts it contains have been registered in ZooBank, the online registration system for the ICZN. The ZooBank LSIDs (Life Science Identifiers) can be resolved and the associated information viewed through any standard web browser by appending the LSID to the prefix http://zoobank.org/. The LSID for this publication is: urn:lsid:zoobank.org:pub:22286699-8306-4931-8D7F-7BF05EB2B304. The online version of this work is archived and available from the following digital repositories: PeerJ, PubMed Central and CLOCKSS.
Mostrar mais

47 Ler mais

Taxonomic revision and phylogenetic relationships of the Roeboides microlepis species-group (Ostariophysi, Characiformes, Characidae).

Taxonomic revision and phylogenetic relationships of the Roeboides microlepis species-group (Ostariophysi, Characiformes, Characidae).

Maxilar longo, com 6 a 19 dentes, extremidade posterior entre as verticais que passam pela metade da órbita e sua margem posterior; jovens somente com dentes cônicos de base larga, e tod[r]

26 Ler mais

Taxonomic revision of doubtful Brazilian freshwater shrimp species of genus Macrobrachium (Decapoda, Palaemonidae)

Taxonomic revision of doubtful Brazilian freshwater shrimp species of genus Macrobrachium (Decapoda, Palaemonidae)

exopodite laminiform well developed (Figs 13.2, 14.2, 15.2). Third maxilliped elongated, basis, ischium and merus fused and distally extended with exopodite laminiform developed reaching the proximal end of the carpus; coxae with lobed epipodite; setae on all articles, mainly on the propodus and dactylus (Figs 13.3, 14.3, 15.3). First pereiopods (P1) reaching with half or with the proximal third of the carpus beyond the scaphocerite. Second pereiopods (P2) very unequal. The smaller one reaching with proximal third of the chelae or until half part of the carpus beyond the scaphocerite (fingers 1.5 times length of palm, bent to form a gap; cutting edges with a tooth in proximal part; both cutting edges with rigid and long setae directed inwardly, filling the gap between the fingers; palm slightly compressed and 1.5 times as long as wide; longitudinal rows of spinules present on the palm and fingers being the lower larger and more spaced; carpus slightly larger than palm and almost equal to merus; carpus and merus little swollen and provided with spinules as in the palm; ischium 3/4 of the length of the merus). The larger one reaching with entire carpus or until with the distal third of the merus beyond the scaphocerite. Ischium half to 2/3 as long as the merus. Merus swollen in the median portion; with longitudinal row of spines as in carpus, smaller and more dense dorsally, stronger and more spaced ventrally. Carpus strongly swollen anteriorly, constricted near the base; 2/3 as long as the palm; about as long as the merus; about 2 times as long as high; rows of small spines dorsally. Propodus two times as long as the dactylus and two times as long as the carpus. Palm slightly compressed and swollen, with upper and lower margin superior and inferior convex; 1.5 to 2.5 times as long as high and about as long as the fingers; dense velvety pubescence on the inner, outer and lower surfaces
Mostrar mais

12 Ler mais

Revision and taxonomic position of the genus Euphronia Martius ex Martius Zuccarini( Voc

Revision and taxonomic position of the genus Euphronia Martius ex Martius Zuccarini( Voc

The genus Euphronia was originally pu- blished by Martius and Zuccarini in 1825, based on material collected by Martius, and placed in Kunth's family Spiraeaceae.. L[r]

5 Ler mais

Taxonomic revision of the Elephant Pupinid snail genus Pollicaria Gould, 1856 (Prosobranchia, Pupinidae)

Taxonomic revision of the Elephant Pupinid snail genus Pollicaria Gould, 1856 (Prosobranchia, Pupinidae)

No external anatomical features were found to exhibit useful taxonomic characters. Internal anatomy: he internal anatomical description of P. mouhoti mouhoti col- lected form Tam Wungdang, Nern Maprang, Phitsanulok, hailand serves as being representative of the genus. Kidney (k) a brownish lobule, constricted-triangular in shape. Heart located on the left side of kidney; pericardium (pcd) thin, atrium (at) slightly larger than ventricle (ven). Lung cavity (lc) with reticulated vessels. Stomach (st) embedded in dark brown lobulated digestive gland (dg). Rectum (rt) large, at- tached to genital apparatus (prostate gland or uterus), and tapering anteriorly to anus
Mostrar mais

22 Ler mais

Taxonomic revision of thorny catfish genus Hassar (Siluriformes: Doradidae)

Taxonomic revision of thorny catfish genus Hassar (Siluriformes: Doradidae)

Dorsal-fin II,6 (n=52), triangular with distal margin approximately straight, vertical when erected. Dorsal-fin spine slightly compressed and curved, with relatively small antrorse serrations along anterior margin (serrations reduced or absent on distal third); slightly larger retrorse serrations along posterior margin (serrations absent on proximal portion). Pectoral fin modally I,8, range I,7-9 (n=52); distal margin straight, oblique relative to body axis. Pectoral-fin spine slightly depressed and curved, with antrorse serrations along anterior margin (serrations absent on distal third); slightly larger retrorse serrations along posterior margin (serrations larger distally). Pelvic fin i,6 (n=52); distal margin rounded. Anal fin modally iv,8, range iii-v,7-9 (n=51); subtriangular with scarcely rounded distal margin. Adipose fin relatively small, teardrop-shaped, with rounded free posterior margin. Caudal fin i,7/8,i (n=52, rarely i,7/7,i or i,7/ 9,i), distinctly forked, with lobes approximately equal in size. Gas bladder (Fig. 4) moderately large, cordiform. Gas bladder walls entirely smooth in small specimens (up to 50 mm SL). Large specimens have only two short rounded diverticula on each side of anterior chamber; in the largest specimen examined (ANSP 69392, 201.6 mm SL) a third pair of diverticula are present at middle of lateral margin of posterior chambers; lateral diverticula rarely branched (only in large specimens). Gas bladder rounded posteriorly, not extended into terminal diverticula.
Mostrar mais

28 Ler mais

Taxonomic revision of the Malagasy members of the Nesomyrmex angulatus species group using the automated morphological species delineation protocol NC-PART-clustering

Taxonomic revision of the Malagasy members of the Nesomyrmex angulatus species group using the automated morphological species delineation protocol NC-PART-clustering

rugae. Mesopleuron sculpture: areolate ground sculpture superimposed by dispersed rugulae. Metapleuron sculpture: areolate ground sculpture superimposed by dispersed rugulae. Petiole width vs. absolute cephalic size (PEW/CS): 0.410 [0.376, 0.445]. Dorsal region of petiole sculpture: ground sculpture areolate, main sculpture rogoso-reticulate. Postpetiole width vs. absolute cephalic size (PPW/CS): 0.488 [0.443, 0.546]. Dorsal region of postpetiole sculpture: ground sculpture areolate, main sculpture dispersed rugose. Diagnosis. Workers of N. angulatus can be convincingly separated from those of N. clypeatus based on the lack of median clypeal notch in the former species (Fig. 4A). Nesomyrmex angulatus differs from species of bidentatus-complex and devius-complex (N. devius, N. exiguus, N. fragilis, N. gracilis and N. hirtellus) by having sharp anterolateral pronotal angles (Fig. 4C) and a numeric key, FRS/CS ratio yields perfect separation between workers of N. angulatus and members of bidentatus-complex (Table 2). Distribution. In the Malagasy zoogeographical region, this species is known to occur in coastal dry forests, mangroves and the coastal scrub of the northern, dry area of Madagascar and on adjacent islands in the Mozambique channel (Fig. 3). Worldwide, N. angulatus has spread to the eastern Africa and the Middle East.
Mostrar mais

35 Ler mais

Taxonomic revision of the deep channel electric fish genus Sternarchella (Teleostei: Gymnotiformes: Apteronotidae), with descriptions of two new species

Taxonomic revision of the deep channel electric fish genus Sternarchella (Teleostei: Gymnotiformes: Apteronotidae), with descriptions of two new species

limb length. Post-temporal fused with supracleithrum in mature specimens. Ventral ethmoid large and robust with a large fan-shaped lateral process. Dorso-anterior portion of mesethmoid straight. Anterior tip of mesethmoid scyphate on dorsal surface. Anterior fontanel longer than posterior fontanel. Lateral ethmoid large hour-glass shaped, most narrow portion at mid-length. Orbitosphenoid broad, well ossified in median nasal septum with ventral margin longer than dorsal margin. Dorso-medial portion of orbitosphenoids in contact (visible through anterior fontanel in dorsal view). Absence of ventral process of pterosphenoid, anterior ventral margin of pterosphenoid similar to posterior ventral margin of orbitosphenoids. Lateral process of parasphenoid small, lateral margins of parasphenoid not extending to a horizontal with trigeminal foramen. Parasphenoid ventral margin straight or slightly curved. Distance between parietal ridges narrow, lateral to supraoccipital, parietal ridges are very large and pronounced. No thorny projections present at border of parietal and supraoccipital. Dorsal margin of supraoccipital crest exceed dorsal margin of parietals. Supraoccipital crest extends to a dorsal distal tip. Internal carotid foramen reduced. Ventral surface of basioccipital smooth. Anterior extension of infraorbital canal short. Supraorbital canal fused to frontal. Mandibular canal size small. Mandibular canal ossicles form long slender tubes. Supratemporal laterosensory canal curved at a sharp angle on surface of parietal, extending posterior onto epaxial surface of body, terminal canal pore oriented posteriorly, epidermis overlying supratemporal canal depigmented. Endopterygoid large, contacting frontal. Base of gill rakers contacting gill arch. Gill rakers long with ossified distal tips. Dorsal surface of basihyal flat; small ridge may be present posteriorly. Second basibranchial hour-glass shaped with most narrow portion at mid-length. Third basibranchial unossified. Twelve or less teeth present on pharyngobranchial. Eight or more teeth present on sixth hypobranchial. Medial surface of fourth hypobranchial with a process or bridge extending to meet contralateral process on midline. Urohyal blade unossified. First hypohyal bell- or cylinder shaped.
Mostrar mais

30 Ler mais

Revisão taxonômica das espécies do gênero Ornithonyssus (Acari: Macronyssidae) parasitos...

Revisão taxonômica das espécies do gênero Ornithonyssus (Acari: Macronyssidae) parasitos...

BASTOS, F. A. N. Taxonomic revision of species of the genus Ornithonyssus (Acari: Macronyssidae) on small wild mammals from Brazil and the rickettsial infection evaluation in these mites [Revisão taxonômica das espécies do gênero Ornithonyssus (Acari: Macronyssidae) parasitos de pequenos mamíferos terrestres no Brasil e avaliação da infecção desses ácaros por Rickettsia spp]. 2008. 63f. Dissertação (Mestre em Medicina Veterinária) - Faculdade de Medicina

63 Ler mais

Taxonomic revision of Spectracanthicus Nijssen Isbrücker (Loricariidae: Hypostominae: Ancistrini), with description of three new species

Taxonomic revision of Spectracanthicus Nijssen Isbrücker (Loricariidae: Hypostominae: Ancistrini), with description of three new species

For the majority of the ornamental loricariid fish species from Amazon basin, the most imminent danger is the construction of dams. In the case of rio Xingu, the project of Belo Monte Dam includes a major barrage located 40 km downstream from the city of Altamira (Volta Grande region), forming the reservoir Xingu. As a consequence, areas of the River with current water will give rise to a large lake of standing water. Fish that live in this type of environment are not adapted to slow flowing waters or lenthic environments which are low in oxygen. Furthermore, dozens fish species that exist only at the Volta Grande may disappear, because while the region is a lotic environment, it will not keep sufficient flow to maintain such species (L. M. Sousa, pers. comm.). The Xingu Spectracanthicus species are widely distributed along the rio Xingu and have several subpopulations. In this case, some of these subpopulations may be greatly reduced or even become locally extinct, but the species as a whole will probably not be extinguished, since it will remain in little or non-impacted areas where the water reaming is current. The same scenario may be expected to occur with S. zuanoni, even though its subpopulations are smaller than S. puctatissimus.
Mostrar mais

25 Ler mais

Taxonomic Revision of Pinus fujiii (Yasui) Miki (Pinaceae) and Its Implications for the Phytogeography of the Section Trifoliae in East Asia.

Taxonomic Revision of Pinus fujiii (Yasui) Miki (Pinaceae) and Its Implications for the Phytogeography of the Section Trifoliae in East Asia.

In addition to the problem on its affinity, we recently realized that Pinus trifolia may have a nomenclatural problem. Before the publication of P. trifolia by Miki [30], a new name, Pinites fujiii, was given to a female cone collected from the Seto Formation [34]. Yasui [34] stated the diagnosis for Pinites fujiii as “The phyllotaxy of the scales is 8/21. The end of the scale is gener- ally wedge-shaped with the point drawn out into a hook. In the middle part of the cone the hook is elongated and deflected, while at the base it points downward.” Therefore, Pinites fujiii and Pinus trifolia apparently largely share the same female cone characters; however, the rela- tionship between the two species has not been discussed until now.
Mostrar mais

18 Ler mais

Taxonomic revision of the Rineloricaria species (Siluriformes: Loricariidae) from the Paraguay River basin

Taxonomic revision of the Rineloricaria species (Siluriformes: Loricariidae) from the Paraguay River basin

. Paraguay: Departamento de Alto Paraguay: MNHNP 3673, 1, 58.2 mm SL, río Paraguay, Fuerte Olimpo. MNHNP 3674, 1, 53.3 mm SL, río Paraguay, Puerto 14 de mayo. NRM 33313, 1 (plus 30 ex. of R. parva), 58.1 mm SL, río Paraguay, Bahia Negra. NRM 37673, 2 (plus 11 ex. of R. parva), 52.2-58.5 mm SL, río Paraguay, Bahia Negra. Departamento de Amambay: MNHNP 2662, 5, 44.5-64.5 mm SL, affluent of the río Apa, Bella Vista. Departamento de Caaguazú: NRM 42111, 2, 54.0-67.5 mm SL, affluent of the río Tebicuary-mí, Coronel Oviedo. NRM 42849, 8, (4), 23.5-72.0 mm SL, affluent of the río Yhaguy, San José. Departamento de Canindeyú: MNHNP 474, 2, (1), 42.7-68.4 mm SL, affluent of the río Jejuí, San Isidro de Curuguaty. MNHNP 1589, 1, 46.9 mm SL, tributary of the río Jejuí, San Isidro de Curuguaty. MNHNP 2866, 1, (1), 73.4 mm SL, affluent of the río Jejuí, Colonia Lomas Valentinas. MNHNP 3608, 1, 53.4, río Jejuí-mí, Reserva Natural del Bosque Mbaracayú. MNHNP 3669, 1 c&s, 72.0 mm SL, arroyo Pira-Cajón, Reserva Natural del Bosque Mbaracayú. NRM 22472, 1, (1), 66.6 mm SL, NRM 32580, 3, (2), 45.0-59.6 mm SL, río Jejuí- mí, Curuguaty. UMMZ 206295, 1 (plus 19 ex. of R. lanceolata), 42.2 mm SL, arroyo Carimbatay, Curuguaty. Departamento de Concepción: MNHNP 510, 2, (1), 50.4-65.6 mm SL, Tagatiyá-Mí, Paso Barreto. MNHNP 3664, 3, (1), 47.2-64.4 mm SL, Tagatiyá- Mí, Paso Barreto. MNHNP 3670, 1 c&s, 67.1 mm SL, affluent of the río Apa, Parque Nacional Paso Bravo. MZUSP 54228, 2, (2), 56.1-62.3 mm SL, río Aquidabán, Concepción. NRM 23028, 1 (plus 11 ex. of R. parva), 38.9 mm SL, arroyo Laguna Penayo, Paso Barreto. NRM 32584, 3, (2), 63.9-65.9 mm SL, arroyo Laguna Penayo, Paso Barreto. Departamento de Cordillera: ANSP 164276, 1, (1), 69.1 mm SL, possibly Caacupé. CZCEN 315, 1 c&s, 60.2 mm SL, affluent of the río Yhaguy, Caraguatay. MNHNP 3655, 5,
Mostrar mais

27 Ler mais

MATERIAL AND METHODS Taxonomic revision

MATERIAL AND METHODS Taxonomic revision

Redescription (male, Fig. 35A): Integument very shiny, head dark brown with frons lighter, antennomeres I-III reddish-brown, IV-XI dark brown; pronotum light yellowish-brown or ochre with posterior angles, anterior and posterior borders black; scutellum with borders darker, elytra light brown with surrounding area of punctures darker; ventral surface dark brown to black, except for the posterior part of prosternum, epipleura, femur and lateral border of ventrites  1-4 and ventrite  5 light brown; pilosity yellow. Total length 10.0-14.0 mm; elytral base 1.10-1.12x wider than prothorax, elytra 3.12-3.33x longer than pro- notum. Frons with a triangular concave area, frontal carina produced; antenna (Fig. 17A) reaching the base to apex of the posterior pronotal angles; antennomere IV-IX as long as wide; X 1.28x longer than wide; XI oval 1.75x longer than wide. Pronotum weakly con- vex (Fig.  17B) 1.17-1.19x wider than long, lateral sides straight and roundly narrowed from posterior angle to anterior margin, posterior angles long, nar- row and carinate; lateral carina nearly reaching the anterior margin, nearly entirely visible dorsally; disc with punctures umbilicate, 1-2 diameters apart, a little larger and denser on lateral and anterior bor- ders; prosternal process (Fig. 17C) without subapical tooth. Lamellae of pro- and mesotarsomere I a little smaller than the others, present on metatarsomere I. Elytra tapering apicad from humerus or anterior third, punctures of apical striae larger than those of the pronotal lateral border; elytral interstices weakly convex, smooth, sparsely punctate. Abdomen with ventrites 2-3 strongly concave laterally, with long de- cumbent setae on ventrites 2-4, a little shorter on ven- trite  1. Pregenitalic segments and aedeagus covered with yellow to light-brown setae. Sternite VIII with posterior margin straight or emarginate medially, an- terior sclerotization inverted V-shaped 0.28x the total width of sternite; sternite IX with apex acute.
Mostrar mais

76 Ler mais

Taxonomic revision of the genus Prionopelta (Hymenoptera, Formicidae) in the Malagasy region

Taxonomic revision of the genus Prionopelta (Hymenoptera, Formicidae) in the Malagasy region

Worker description. Highest cephalic index on average of Malagasy Prionopelta (CI 81.78–85.31 (83.78); posterior margin of the head with slight notch medially in full-face view; cephalic foveae shallow, large, and widely spaced; directly adjacent cephalic foveae either completely lacking, or very rare; if any foveae are adjacent, then always with only 2–3 foveae connected, and these usually always medially on the head in full-face view; majority of cephalic foveae separated by 1–3 foveal diameters, appear cleanly scooped from the shining integument, and lack raised margins; median cephalic band devoid of foveae is uniformly broad, and not swelling above the integument; apical tooth very long, longest of all Malagasy Prionopelta, over four times the length of the third apical tooth measured from base to tip (Fig. 2C); sculpture of the dorsum of the mesosoma consisting of large, shallow foveae which are widely spaced at 2–3 foveal diameters with punctures present between foveae; no metanotal suture present in dorsal view, but rather a shining surface with no clear distinction between propodeum and mesonotum; in a few speci- mens, a slightly perceptible depression is sometimes visible at the site of the metanotal suture, with associated notches on the lateral edges of the dorsum of the mesosoma, but this depression always lacks scarring; in lateral view, mesopropodeal suture weak, ap- pearing as a gradual depression rather than a scar; posterior propodeal edge seen dorsally strongly concave; sharp lamellae of the posterior propodeum present.
Mostrar mais

36 Ler mais

A taxonomic revision of the Southern South American species of the genus F

A taxonomic revision of the Southern South American species of the genus F

Legs: Dark grey to black, yellow brown at articula- tions. F1: normal to thin (length/width = 7.1), with 1 row of pd as long as femoral width, with five to six rows of short hair-like p; 1 row of pv slightly longer than femoral width. T1 with 1 subapical pd; 1 apical v and 1 apical pv; 1 apical and 1 submedial ad, lack- ing medial row of ad. Fore tarsomere 1 flattened and expanded, partially yellowish white and with a broad leaf-like spine at the tip of posterior surface; tarsomere 2 completely yellowish white; tarsomere 3 and 4 as wide as long, partially yellowish white (Fig. 2A). F2 with 1 complete row of ad and 1 row of a; 1 row of hair-like av at base, stout and shorter towards apex; 1 complete row of hair-like pv at base, and two rows of shorter and stouter setae in apical third; 1 row of hair-like p at base, stouter and ventrally directed at apex. T2 constricted at base, with a subbasal protu- berance; ventral pubescence short, 0.3x tibial width; with 1 submedian and 3 apical a; 1 subapical ad; 1 strong, slightly curved apical av; 1 submedian and 1 weaker apical pd; 1 short and stout apical p. Mid tar- somere 1 with a basal ventral crest, followed by short strong seta. C3 bare at apex of posterior surface. F3 thin (length/width = 10); ventral and posteroventral surfaces with a very prominent preapical tubercle (Fig. 2B); 1 row of ad, longer and dorsally directed towards apex; 1 row of av as long as femoral width, interrupted preapically and with 2 or 3 long apical av; preapical tuft of hair-like pv, 1.5x femoral width. T3 with 1 long submedian and 1 shorter (0.5x length of submedian) subapical d, 1 submedian and 1 api- cal ad, lacking median row; 2 medial and 1 apical av; ventral and posteroventral surfaces with a weak apical ctenidium at apex.
Mostrar mais

59 Ler mais

Taxonomic revision of genus Homodiaetus (Teleostei, Siluriformes, Trichomycteridae).

Taxonomic revision of genus Homodiaetus (Teleostei, Siluriformes, Trichomycteridae).

TAXONOMIC REVISION OF GENUS HOMODIAETUS (TELEOSTEI, SILURIFORMES, TRICHOMYCTERIDAE). The genus Homodiaetus Eigenmann & Ward, 1907 is revised and four species are recognized. Its distribution is restricted to southeastern South America, from Uruguay to Paraguay river at west to the coastal drainages of Rio de Janeiro State, Brazil. Homodiaetus is currently distinguished from other genus of Stegophilinae by the combination of the following characters: origin of ventral-fin at midlength between the snout tip and the caudal-fin origin; opercle with three or more odontodes; and gill membranes confluent with the istmus. Homodiaetus anisitsi Eigenmann & Ward, 1907, is diagnosed by the caudal-fin with black middle rays, margin of upper and lower procurrent caudal-fin rays with dark stripes extending to the caudal-fin, and 3-6 opercular odontodes; H. passarellii (Ribeiro, 1944) with 6-7 opercular odontodes, 21-24 lower procurrent caudal-fin rays and 23-26 upper procurrent caudal-fin rays; H. banguela sp. nov. with 9 opercular odontodes, 17-19 lower procurrent caudal-fin rays, 17-22 upper procurrent caudal-fin rays, reduction of fourth pharyngobranchial with only three teeth and untoothed fifth ceratobranchial; and H. graciosa sp. nov. with 5-6 dentary rows, 7-9 opercular odontodes and 16-23 upper procurrent caudal-fin rays.
Mostrar mais

14 Ler mais

Taxonomic revision of Galeocharax (Characiformes: Characidae: Characinae)

Taxonomic revision of Galeocharax (Characiformes: Characidae: Characinae)

The taxonomy of Galeocharax, a genus of freshwater fishes distributed in most South American cis-Andean river systems, except the rio Negro, rio São Francisco and rio Xingu basins and the eastern drainages of Brazil, is herein revised. A total of 1229 specimens were examined from which 680 had meristic and morphometric data taken. Osteological and morphological features were also examined through radiographs, scanning electron microscopy and in cleared and stained specimens. Three of the four species previously considered as valid are herein recognized: Galeocharax humeralis from rio Paraguay and lower rio Paraná basins; Galeocharax goeldii, from rio Madeira basin, with records of geographical distribution expanded to the río Madre de Dios, río Beni, rio Mamoré and rio Guaporé basins and Galeocharax gulo, which is widespread throughout rio Amazonas, río Orinoco, rio Tocantins, and upper rio Paraná basins. Galeocharax knerii is herein considered a junior synonym of Galeocharax gulo. A key to species of Galeocharax is presented.
Mostrar mais

32 Ler mais

Show all 10000 documents...

temas relacionados