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Two new species of Neomachilellus Wygodzinsky

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Two new species of

Neomachilellus

Wygodzinsky

(Meinertellidae, Microcoryphia) from the state of Amazonas, Brazil

P e d r o W y g o d z i n s k y ( * )

A b s t r a c t

T w o n e w s p e c i e s of M i c r o c o r y p h i a , N e o m a c h i l e l l u s

adisi and N . s c a n d e n s , o c c u r r i n g in t h e i n u n d a t i o n f o r e s t s near M a n a u s and c o l l e c t e d In t r e e - t r a p s , are

d e s c r i b e d and c o m p a r e d t o o t h e r s p e c i e s of t h e g e n u s .

The present paper contains the de-scriptions of t w o new species of the large,

mainly neotropical machilid genus

Neomachi-lellus Wygodzinsky, w i t h the purpose of making their names available for ecosystem analyses now being carried out by Adis (1977) in the inundation forests near Manaus, be-t w e e n December 1975 and May 1977. The species here described belong to a group of the genus so far known only f r o m southern Brazil. The apparent absence near Manaus of the northern South A m e r i c a n genus Meiner-tellus Silvestri is notable.

Neomachilellus adisi,

sp. n.

( F i g u r e s 1A, 2, 3)

M a x i m u m observed body length 12 m m ; maximum length or antennae 18 m m , of t e r m i -nal filament 14 m m . Color of body light y e l l o w ; hypodermal pigment on head, mouthparts, antennae and legs. Color pattern f o r m e d by scales, unknown.

Head w i t h 1 + 1 pigment spots between ocelli and 1 + 1 spots behind ocelli (figs. 1A,

3 D ) . Color pattern of eyes ( f i g . 2A) consisting of three dark, curved stripes, their curvature parallel to that of anterior margin of eyes; uppermost dark stripe wider than the t w o o t h e r s . Eyes approximately as long as w i d e , their line of contact equal to five sixth of their

length. Ocelli (figs. 1A, 3D) only slightly shorter than anterior border of eyes, narrowly

sole-shaped. Head capsule w i t h o u t secondary sexual -characters. Antennae longer than body.

Scapus w i t h pigment arranged as shown in figure 1A, characterized by elongate parallel--sided marking on outer s u r f a c e . Flagellum light b r o w n , w i t h intermediate j o i n t l e t s slightly but d i s t i n c t l y darker than chains ( f i g . 3E). Pigmentation of mandibles as shown in figure 2C. Maxillary palpi as shown in figures 2E, 3A, their pigment pattern characterized by narrow longitudinal dark mark on second arti-cle w i t h field of short, semierect hairs ( f i g . 1J); remaining articles w i t h o u t special features; seventh as long as p e n u l t i m a t e . Labial palpi narrowly bordered w i t h pigment along anterior surface (figs. 2B, 3F). Terminal article of labial palp strongly widened in both sexes, a l m o s t t w i c e as wide as long in male.

Pigmentation of legs as s h o w n in figures 2F, G; 3B, C, characterized by elongate narrow marking on tibiae of all legs, although in some cases less developed on hind legs ( f i g . 3C). Femora and tibiae w i t h o u t spine-like setae, although some present on t a r s i . Underside of

hind tibiae w i t h very numerous short, simple setae ( f i g . 21).

Stylets of ninth abdominal segment of male as long as coxite ( f i g . 2H), in female three fourths as long as c o x i t e . Distal spine of s t y l e t V one half as long as s t y l e t ( f i g . 3G), distal spine of stylet IX one f o u r t h as long as s t y l e t ( f i g . 2H).

Apical portion of penis as illustrated ( f i g . 2K). Ovipositor attaining level of t e r m i n a l spine of s t y l e t IX. Gonapophyses consisting of 68-75 articles, their chaetotaxy ( f i g . 3H) as usual for the genus.

M A T E R I A L E X A M I N E D :

Brazil:

Amazonia:

Taruma M i r i m , near Manaus, in tree-traps, J. Adis leg. (one male, holotype, one female.

( * ) — The A m e r i c a n M u s e u m of N a t u r a l H i s t o r y , N e w Y o r k .

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short setae on the under surface of the hind

tibiae, much longer in albuquerquei, and by

the smaller field of short semierect setae on the apex of the second article of the maxillary palp of the male.

Neomachilellus scandens,

sp. n.

( F i g u r e s I B , 4, 5)

M a x i m u m observed body length 12 m m . ; m a x i m u m length of antennae 17 m m , of t e r m i -nal f i l a m e n t 13 m m . Color of body y e l l o w i s h w h i t e ; hypodermal pigment on head, mouth-parts, antennae and legs. Color pattern formed

by scales, u n k n o w n .

Head w i t h 1 + 1 pigment spots between ocelli ( f i g . 4F) and '4-1 spots behind o c e l l i .

F i g . 2 — N e o m a c h i l e l l u s a d i s i , m a l e . — A . Eye and o c e l l u s , s u b l a t e r a l v i e w . B. Labial p a l p . C . M a n d i -b l e . D. A p e x of t e r m i n a l a r t i c l e of m a x i l l a r y p a l p . F. H i n d l e g . G . F o r e l e g . H . C o x i t e IX w i t h s t y l e t . I. A p e x of h i n d t i b i a . J . A p e x o f s e c o n d a r t i c l e o f m a x i l l a r y p a l p . K. A p e x of p e n i s . L. C e n t e r of hind

b o r d e r of u r o s t e r n i t e V I I I . — W y g o d z i n s k y d e l . F i g . 1 — Head w i t h scapus of a n t e n n a and w i t h basal

a r t i c l e s of m a x i l l a r y p a l p , lateral v i e w . — A . Neo-m a c h i l e l l u s a d i s i . B. N e o Neo-m a c h i l e l l u s s c a n d e n s —

W y g o d z i n s k y d e l .

allotype, in the Instituto Nacional de Pesqui-sas da Amazonia (INPA); 10 paratypes and 32 additional specimens in the Instituto Nacional de Pesquisas da Amazonia (INPA) and in The American M u s e u m of Natural H i s t o r y ) .

E T Y M O L O G Y; This species is named for

its c o l l e c t o r .

D I S C U S S I O N: In t h e last published key to

the species of Neomachilellus (Wygodzinsky,

1952), N. adisi w o u l d key out to N. ibiti

Wygodzinsky, N. lenti Wygodzinsky and N.

al-buquerquei Wygodzinsky, all described f r o m southern Brazil. N. adisi differs from ibiti by the presence of w e l l developed pigment on the

legs, absent in ibiti; by the much narrower

distal article of the labial palp, in both sexes, and by the hypodermal pigment arranged in a dark, narrow longitudinal band on the second article of the maxiallry palp, very faint in ibiti. N. adisi can be distinguished f r o m N. lenti by the relatively s h o r t apical spine of the stylets of urosternite V, the spine being as long as the s t y l e t itself in lenti; by the very short setae of the under surface of the hind t i b i a e , much longer in lenti; by the absence of a field of short spiniform setae on the apical portion of the second article of the maxillary palp of

the male, present in lenti, and by the slightly

but d i s t i n c t l y darkened intermediate jointlets of the flagellum of t h e antennae, concolorous w i t h the chains in lenti. Finally, N. adisi can be distinguished f r o m N. albuquerquei by the much more extensive pigment on the maxillary palpi; by the presence of pigment on the legs,

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F i g . 3 — N e o m a c h i l e l l u s a d i s i , f e m a l e . — A . M a x i l l a r y p a l p , o u t l i n e o n l y . B, Fore l e g . C . H i n d l e g . D . Eyes and o c e l l i , f r o n t v i e w . E. P o r t i o n of f l a g e l l u m o f a n t e n n a . F. Labial p a l p . G . U r o s t e r n i t e V . H . D i s t a l area of a n t e r i o r g o n a p o p h y s i s . — W y g o d z i n s k y d e l .

Color pattern of eyes ( f i g . 4G) consisting of large diffuse spots (probably better defined in live s p e c i m e n s ) . Eyes ( f i g . 4E-G) slightly wider than long ( l e n g t h / w i d t h = 1 / 1 . 1 ; t h e i r line of contact equal to three f i f t h s t h e i r length. Ocelli only slightly shorter than anterior border of eyes, narrowly sole-shaped ( f i g s . 1B, 4E, F). Head capsule not sexually d i m o r p h i c .

Antennae longer than body. Scapus w i t h pigment arranged as in figure 1B, characterized by wide subapical, darkly p i g m e n t e d , trans-verse m a r k i n g . Flagellum light b r o w n , w i t h intermediate j o i n t l e t s concolorous ( f i g . 4C) w i t h chains or slightly darker. Pigment pattern of mandibles as shown in f i g u r e 5 H . Maxillary palpi as s h o w n in figures 4A, 5A, t h e i r pigment pattern characterized by hourglass-shaped, in some cases interrupted dark marking on second article ( f i g s . 1B, 4A, 5 A ) . Second article of palp of male w i t h slightly sclerotized process beset w i t h several long setae ( f i g . 4J); inner surface of apex of article only w i t h

scattered hairs, specialized setae absent. Remaining articles w i t h o u t special features, seventh as long as p e n u l t i m a t e . Labial palpi narrowly bordered w i t h pigment along anterior surface (figs. 4D, 5G). Terminal article of labial palp strongly widened in both sexes, almost t w i c e as long as w i d e in m a l e .

Pigmentation of legs as s h o w n in figure 5B. C, similar in both sexes, characterized by wide extension of pigment on tibiae, especially on fore legs. Femora and tibiae w i t h o u t

spine-like setae, although some present on tarsi Under surface of posterior t i b i a e w i t h dense, slender, medium-sized setae ( f i g . 41).

Stylets of ninth segment of male six seventh as long as coxite. in female t w o thirds as long as c o x i t e . Distal spine of styles V

F i g . 4 — N e o m a c h i l e l l u s s c a n d e n s . m a l e . — A . Ma-x i l l a r y p a l p . B. A p e Ma-x of t e r m i n a l a r t i c l e of m a Ma-x i l l a r y p a l p . C . P o r t i o n of f l a g e l l u m . D . Labial p a l p . E. Eye and o c e l l u s , s u b l a t e r a l v i e w . F. Eyes and o c e l l i , f r o n t v i e w . G . Eye w i t h c o l o r p a t t e r n , s c h e m a t i c . H C e n t e r o f u r o s t e r n i t e V I I I . I. S e t a e of u n d e r s u r f a c e of h i n d t i b i a . J . H o o k - s h a p e d p r o c e s s o f s e c o n d a r t i c l e of m a x i l l a r y p a l p . K. D i s t a l p o r t i o n o f p e n i s . — W y g o d

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(fig. 5F) t w o thirds as long as s t y l e t ; distal spine of stylet IX one half as long as stylet (fig. 5E).

Penis as i l l u s t r a t e d ( f i g . 4K). Ovipositor attaining or slightly surpassing level of apex of terminal spine of stylets IX. Gonapophyses consisting of 55-60 a r t i c l e s , their chaetotaxy (fig. 5D) as usual for the genus.

M A T E R I A L E X A M I N E D: Brazil: Amazonia:

Taruma M i r i m , near Manaus. in tree traps, J. Adis l e g . (one male, holotype, one female, allotype, in the Instituto Nacional de Pesqui-sas da Amazonia (INPA) Manaus; 11 paratypes and 42 additional specimens in the Instituto Nacional de Pesquisas da Amazonia (INPA) and The A m e r i c a n M u s e u m of Natural History, New Y o r k ) .

F i g . 5 — N e o m a c h i l e l l u s s c a n d e n s , f e m a l e . — A . M a -x i l l a r y p a l p . B. H i n d l e g . C . Fore l e g . D . T e r m i n a l

p o r t i o n of a n t e r i o r g o n a p o p h y s i s . E. S t y l e t I X . F. Portion of u r o s t e r n i t e V . G . Labial p a l p . H . M a n d i

-b l e . — W y g o d z i n s k y d e l .

E T Y M O L O G Y: From the Latin scando,

climb, in allusion t o the arboreal way of life of the s p e c i e s .

D I S C U S S I O N : Neomachilellus scandens

also keys out to N. ibiti, N. lenti and N. albu-querquei. N. scandens can be distinguished f r o m ibiti by the relative length of the terminal article of the maxillary palp, equal in length

to the penultimate article in scandens but

d i s t i n c t l y shorter than the penultimate in ibiti,

and by the apical spine of stylet V, about t w o thirds as long as the s t y l e t proper in scandens

and much shorter in i b i t i . N. scandens differs from N. Icnti by the absence, in the male, of a group of short s p i n i f o r m setae on the apex of the second article of the maxillary palp, present in lenti, and by the relative size of the t e r m i n a l article of the maxillary palp of both

sexes, as long as the penultimate in scandens

but much shorter than the penultimate in lenti.

Finally, N. scandens is distinguished f r o m N. albuquerquei by the apical spine of the stylets V, t w o thirds as long as t h e s t y l e t proper in

scandens but only about half as long as the s t y l e t in albuquerquei. In albuquerquei, the t e r m i n a l article of the maxillary palp is much shorter than the penultimate, but about as

long as the penultimate in scandens.

Con-spicuous hypodermal pigment is present on

articles l-IV of the maxillary palp in scandens,

but only on articles l-IV in albuquerquei.

Neomachilellus adisi and N. scandens are occasionally collected together and are clearly sympatric in the Manaus area. The t w o species can be distinguished as f o l l o w s :

1 . Eye pattern consisting of transverse stripes (fig. 2A); pigment of scapus f o r m i n g large longitudinal band ( f i g . 1A); second article of maxillary palp of male w i t h pigment arranged in shape of longitudinal s t r i p e

(figs. 1A, 2E); fore tibia w i t h pigment arranged in longitudinal s t r i p e ( f i g . 2G); apical spine of stylet proper ( f i g . 3G); t e r m i n a l spine of s t y l e t IX one f o u r t h as

long as stylet proper ( f i g . 2H) adisi

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large subapical annulus ( f i g . 1B); second article of maxillary palp of male w i t h pigment arranged in hourglass-shaped spot (figs. 1B, 5A); f o r e t i b i a almost entirely

S u m á r i o

São d e s c r i t a s duas e s p é c i e s novas de M i c r o c o r y p h i a .

N e o m a c h i l e l l a s a d i s i e N . S c a n d e n s q u e o c o r r e m nos igapós p e r t o de M a n a u s . Foram c o l e t a d a s em a r m a -dilhas c o l o c a d a s nas á r v o r e s . Essas novas e s p é c i e s são c o m p a r a d a s c o m o u t r a s e s p é c i e s d o g ê n e r o q u e , até e s t e r e l a t o , era apenas c o n h e c i d o do s u l do B r a s i l .

pigmented ( f i g . 5C); apical spine of stylet V t w o thirds as long as s t y l e t proper ( f i g . 5F); terminal spine of s t y l e t IX one half as long as stylet proper ( f i g . 5E) . . scandens

BIBLIOGRAFIA CITADA

A D I S , J O A C H I M

1977 — Programa m í n i m o para análise de e c o s s i s t e -mas : A r t r o p o d e ^ t e r r e s t r e s e m f l o r e s t a s

i n u n d á v e i s da A m a z ô n i a C e n t r a l . A c t a A m a -zônica. 7(2) : 223-229.

W Y G O D Z I N S K Y , P E D R O

1952 — A c t a Z o o l . Lilloana, 11 : 443-446.

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