Pseudomarganana, Dietrich & Magalhães & Takiya, 2020

Dietrich, Christopher H., Magalhães, Raysa Brito de & Takiya, Daniela M., 2020, Revision of the endemic Malagasy leafhopper tribe Platyjassini (Hemiptera: Cicadellidae: Iassinae), European Journal of Taxonomy 695, pp. 1-89 : 65-66

Pseudomarganana gen. nov.

urn:lsid:zoobank.org:act:274736D9-D03A-4A09-96B8-9B859C062032

Figs 3 H–I, 13H–O, 18A–C

Type species

Pseudomarganana olivacea sp. nov.

Diagnosis

This genus may be distinguished by the following combination of features: body medium-sized; dorsum ochraceous to olivaceous, with pair of black symmetrical spots on crown; vertex not overlapping anterolateral margin of eye, crown transversely striate; forewing with very few or no supernumerary crossveins; hindwing veins R4+5 and M1+2 confluent preapically but separate near apex; hind femur macrosetal formula 2+ 2+1; style without denticuli, apex foot-like; aedeagal shaft symmetrical, with pair of lateral preapical spines directed distad.

Etymology

The genus name, a feminine noun, combines ʻ pseudo -ʼ (ʻfalseʼ) with Marganana , the name of a superficially similar American genus belonging to tribe Gyponini .

Description

HABITUS. Medium-sized platyjassines (8.6–9.4 mm). Color olive brown to reddish brown, with pair of round black spots posterad of ocelli on crown and symmetrical black markings along anterior margin of pronotum.

HEAD. Crown declivous, slightly convex, with numerous well delimited transverse striations over entire length, anterior and posterior margins parallel, anterior margin well delimited by pair of parallel transverse carinae, not spatulate, forming only slight ledge over dorsal part of face, vertex without anterolateral extension over eye; ocelli mesad of anteromesal corners of eyes, closer to midline than to eyes. Frontoclypeus moderately convex with median dorsal depression, transversely rugulose; antennal ledge oblique, not overlapping frontoclypeus; lateral frontal suture extended to crown margin above antennal ledge; gena slightly emarginate below eye and relatively broad more ventrad, completely concealing proepisternum; lorum small, flat; anteclypeus slightly convex, lateral margin strongly divergent distally; rostrum broad, extended to middle coxae.

THORAX. Pronotum strongly declivous, in profile continuing contour of crown, much wider than head, lateral margins strongly divergent posteriorly, transverse striations well delimited. Forewing with very few or no supernumerary crossveins, appendix broad and extended to wing apex, inner apical cell relatively long and narrow. Hindwing veins R4+5 and M1+2 confluent preapically, then separate near apex. Front femur rows IC and AV well delimited, with stout setae of similar sizes, somewhat irregular; dorsal surface of tibia flattened and with few macrosetae between PD and AD. Hind femur macrosetal formula 2 +2+1, tibial row AD without smaller setae between successive macrosetae; tarsomere I with plantar setae scattered.

ABDOMEN. Male pregenital sternite distinctly longer than sternite VII, posterior margin truncate. Male pygofer base band-like, dorsally without median posterior projection; lobe separated from base by membranous cleft, with numerous macrosetae in distal half, processes and spines absent, ventral margin without distinct group of fine setae. Subgenital plate with median longitudinal row or band of macrosetae, dorsolateral margin with band of long, fine setae. Style apophysis slender, without ventral denticuli, apex curved dorsomesad, with small, foot-like apical extension. Connective stem long, arms weakly developed, anterior margin convex. Aedeagus with atrium V-shaped in posterior view, with weakly pigmented plate connecting arms of V; shaft simple, with pair of slender symmetrical lateral spines arising near midlength and extended distad, gonopore apical. Female ovipositor extended to pygofer apex; first valvula moderately slender, dorsal sculpturing strigate; second valvulae moderately slender throughout length, dorsal margin with several short, irregular teeth distally.

Remarks

This genus closely resembles Pseudocurtara gen. nov., but differs in having the forewing opaquely sclerotized and uniform in coloration, without extra crossveins.

Key to species of Pseudomarganana gen. nov. (males)

1. Dorsal coloration olivaceous, without red pigment ( Fig. 3H ); lateral spines of aedeagus straight in posterior view ( Fig. 13K ) .................................... Pseudomarganana olivacea gen. et sp. nov.

– Dorsal coloration stramineous, with forewing heavily marked with red pigment ( Fig. 3I ); lateral spines of aedeagus slightly bowed laterad in posterior view ( Fig. 13O ) ....................................... .......................................................................................... Pseudomarganana rosea gen. et sp. nov.

Figures

Fig. 3. Platyjassini, dorsal and lateral habitus of males. A. Plerujassus appendiculatus (Evans, 1959). B. Plerujassus brunnescens sp. nov. C. Plexijassus caliginosus sp. nov. D. Pseudocurtara minima sp. nov. E. Pseudocurtara nigripicta sp. nov. F. Pseudocurtara quadrata sp. nov. G. Pseudocyrta hyalina sp. nov. H. Pseudomarganana olivacea sp. nov. I. Pseudomarganana rosea sp. nov. J. Pulchrijassus anjozorobensis sp. nov. K. Pulchrijassus eunsunae sp. nov. L. Pulchrijassus pallescens sp. nov. M. Pulchrijassus roseus sp. nov. N. Pulchrijassus rubrilineatus sp. nov. O. Pulchrijassus sindhuae sp. nov. P. Pulchrijassus talatakelyensis sp. nov. Q. Pulchrijassus toamasinensis sp. nov. R. Punctijassus circularis sp. nov. S. Punctijassus compressus sp. nov. T. Punctijassus ivohibensis sp. nov. Scale bars = 1 mm.

Fig. 13. Pseudocurtara gen. nov., Pseudocyrta gen. nov. and Pseudomarganana gen. nov. – A–C. Pseudocurtara quadrata sp. nov. A. Genital capsule, lateral view. B. Genitalia, lateral view. C. Same, ventral view. – D–G. Pseudocyrta hyalina sp. nov. D. Genital capsule, lateral view. E. Genitalia, lateral view. F. Same, ventral view. G. Aedeagus, posterior view. – H–K. Pseudomarganana olivacea sp. nov. H. Genital capsule, lateral view. I. Genitalia, lateral view. J. Same, ventral view. K. Aedeagus, posterior view. – L–O. Pseudomarganana rosea sp. nov. L. Genital capsule, lateral view. M. Genitalia, lateral view. N. Same, ventral view. O. Aedeagus, posterior view. Photos not to scale.