Platyjassini Evans, 1953,

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: 3-10

publication ID	https://doi.org/10.5852/ejt.2020.695
publication LSID	lsid:zoobank.org:pub:DC24EAB0-DCF5-44A8-B1A0-82BF25D280C2
DOI	http://doi.org/10.5281/zenodo.4342129
persistent identifier	http://treatment.plazi.org/id/03A587FC-FF89-B528-FDE6-834EFA8D525B
treatment provided by	Valdenar
scientific name	Platyjassini Evans, 1953
status

Treatment

Tribe Platyjassini Evans, 1953

Platyjassini Evans, 1953: 113 (type genus: Platyjassus Evans, 1953 ).

Description

HABITUS. Medium-sized to large (4.9–19.0 mm) pale yellow (green in life) or brown leafhoppers, with or without red, yellow or brown markings. Body moderately to strongly depressed ( Figs 1–3View FigView FigView Fig).

HEAD. With crown flat to slightly convex, usually produced, with two or more transverse carinae delimiting crown-face transition ( Figs 23View Fig D–F). Ocelli on crown well separated from anterior margin and eyes. Face ( Figs 23View Fig D–E) flattened to slightly convex; antenna inserted near anterodorsal corner of eye, shorter than head width; antennal ledge oblique, sharply carinate but not concealing antennal base, or amalgamated with marginal rim of crown; lateral frontal sutures absent or extended only to dorsal margin of face; gena slightly to strongly emarginate below eye, partially to completely concealing proepisternum; lorum flat, not extended to lateral margin of face; anteclypeus flat to slightly convex, distinctly broadened distally; rostrum short, not extended beyond middle coxae.

THORAX. Pronotum ( Figs 1–3View FigView FigView Fig) with transverse striations indistinct to well developed, lateral margins carinate and slightly to strongly divergent posterad of eyes, usually wider than head. Forewing venation ( Fig. 23GView Fig) including at least one s, two r-m and three m-cu crossveins, appendix well developed, much wider than inner apical cell, extended to or near wing apex. Hindwing venation complete, with R4+5 and M1+2 partially ( Fig. 23HView Fig) to completely confluent ( Fig. 23IView Fig). Front femur with AM1 well developed, other setae of AM poorly differentiated or absent; row IC uniseriate or with setae scattered near apex; AV usually with several long, stout setae; tibia cylindrical or with dorsal surface somewhat flattened, row PD with widely spaced macrosetae; AD weakly differentiated; ventral rows moderately to well differentiated. Middle femur usually with several widely spaced macrosetae in AD and PD. Hind femur macrosetal formula usually 2+ 2+1, with penultimate pair close-set; supernumerary macrosetae sometimes present; tibia with all macrosetal rows well differentiated and extended for nearly full length of tibia, PD macrosetae more numerous and usually slightly longer than in AD; tarsomere I with dorsoapical pair of macrosetae, plantar rows variably developed, pecten with four or more platellae.

ABDOMEN. Male abdomen with 2S apodemes usually well developed, capitate ( Fig. 21EView Fig); sternite VII enlarged, posterior margin truncate, slightly produced or slightly emarginate, concealing at least basal half of subgenital plates with genital capsule in resting position. Pygofer ( Fig. 21FView Fig) broadly fused to valve, base well sclerotized dorsally, lobes with numerous scattered macrosetae in distal half, with or without appendages. Subgenital plates ( Fig. 21GView Fig) separate to base, freely articulated to valve, narrow at base, broadened toward middle, then tapered to slightly compressed apices, usually extended to or near pygofer apex, with or without macrosetae, usually with some long, fine setae along dorsolateral margin. Style ( Fig. 19HView Fig) narrow and sinuate basally, with short apodeme and elongate apophysis often bearing denticuli ventrally. Connective ( Figs 19HView Fig, 20HView Fig) with median anterior lobe variably developed, articulated to aedeagus. Aedeagus with dorsal apodeme usually well developed, shaft usually curved dorsad, with or without processes. Ovipositor with dorsal sculpturing of first valvulae strigate ( Fig. 16AView Fig) or (rarely) imbricate-areolate ( Fig. 17QView Fig); second valvulae usually broad distally with dorsal margin serrate distally ( Fig. 16RView Fig), rarely narrow with two widely spaced dorsal teeth ( Fig. 16CView Fig).

Remarks

As mentioned by Evans (1953), Platyjassini are superficially similar to members of the endemic New World iassine tribe Gyponini in having the crown usually well delimited and flattened, with the ocelli on the crown and well separated from the anterior margin and eyes. The two tribes also have a similar structure of the male and female genitalia, forewing venation and leg chaetotaxy. Platyjassini differ from Gyponini in having the anteclypeus broadened apically, the forewing appendix much wider than the inner apical cell, and the hindwing with veins R4+5 and M1+2 partially to completely confluent.

Checklist of Platyjassini Evans, 1953

Betsileonas Kirkaldy, 1903 Betsileonas marmorata ( Blanchard, 1840) . Southern Madagascar.

Pachyjassus gen. nov.

Pachyjassus alatus sp. nov. Mahajanga.

Pachyjassus basifurcatus sp. nov. Toliara.

Pachyjassus ranomafanensis sp. nov. Antananarivo.

Pallijassus gen. nov.

Pallijassus reticulatus ( Evans, 1959) comb. nov. Mahajanga and Toliara.

Pallijassus stenospatulatus ( Evans, 1959) comb. nov. Antananarivo, Mahajanga and Toliara.

Petalojassus gen. nov. Petalojassus ochrescens sp. nov. Fianarantsoa.

Phaiojassus gen. nov.

Phaiojassus acutus sp. nov. Fianarantsoa.

Phaiojassus bispinosus sp. nov. Antananarivo and Fianarantsoa.

Phaiojassus constrictus sp. nov. Antsiranana.

Phaiojassus grandis sp. nov. Antsiranana.

Phaiojassus spatulatus sp. nov. Antsiranana.

Phaiojassus undulatus sp. nov. Antsiranana.

Phaiojassus unispinosus sp. nov. Antananarivo, Fianarantsoa and Toliara.

Pictojassus gen. nov.

Pictojassus kirindiensis sp. nov. Toliara.

Pictojassus productus sp. nov. Toliara.

Pictojassus tulearensis sp. nov. Toliara.

Platyjassella gen. nov.

Platyjassella ancora sp. nov. Antsiranana and Toamasina.

Platyjassella andohahelensis sp. nov. Toliara.

Platyjassella attenuata sp. nov. Toliara.

Platyjassella cormorana sp. nov. Mahajanga.

Platyjassella emarginata sp. nov. Antananarivo.

Platyjassella immaculata sp. nov. Toliara.

Platyjassula gen. nov.

Platyjassula cyclura sp. nov. Mahajanga.

Platyjassula heterofurca sp. nov. Mahajanga and Toliara.

Platyjassula isofurca sp. nov. Toliara.

Platyjassula mahajangensis sp. nov. Antsiranana and Mahajanga.

Platyjassus Evans, 1953

Platyjassus acutus sp. nov. Fianarantsoa.

Platyjassus asymmetricus sp. nov. Fianarantsoa.

Platyjassus fisheri sp. nov. Antsiranana.

Platyjassus griswoldi sp. nov. Antananarivo and Mahajanga.

Platyjassus harinhalai sp. nov. Toliara.

Platyjassus irwini sp. nov. Antananarivo.

Platyjassus pedistylus sp. nov. Fianarantsoa.

Platyjassus pennyi sp. nov. Fianarantsoa.

Platyjassus pictipennis sp. nov. Antsiranana and Mahajanga.

Platyjassus symmetricus sp. nov. Mahajanga.

Platyjassus vestigius sp. nov. Fianarantsoa.

Platyjassus viridis Evans, 1953 . Antananarivo, Antsiranana, Mahajanga and Fianarantsoa.

Plerujassus gen. nov.

Plerujassus appendiculatus ( Evans, 1959) comb. nov. Mahajanga and Toliara. Plerujassus brunnescens sp. nov. Mahajanga.

Plexijassus gen. nov. Plexijassus caliginosus sp. nov. Antsiranana and Fianarantsoa.

Pseudocurtara gen. nov.

Pseudocurtara minima sp. nov. Antananarivo and Antsiranana.

Pseudocurtara nigripicta sp. nov. Toamasina.

Pseudocurtara quadrata sp. nov. Antananarivo, Antsiranana and Fianarantsoa.

Pseudocyrta gen. nov. Pseudocyrta hyalina sp. nov. Antsiranana.

Pseudomarganana gen. nov.

Pseudomarganana olivacea sp. nov. Antananarivo and Fianarantsoa.

Pseudomarganana rosea sp. nov. Fianarantsoa.

Pulchrijassus gen. nov.

Pulchrijassus anjozorobensis sp. nov. Antananarivo.

Pulchrijassus eunsunae sp. nov. Antsiranana.

Pulchrijassus pallescens sp. nov. Fianarantsoa.

Pulchrijassus roseus sp. nov. Fianarantsoa.

Pulchrijassus rubrilineatus sp. nov. Fianarantsoa.

Pulchrijassus sindhuae sp. nov. Antananarivo and Fianarantsoa.

Pulchrijassus talatakelyensis sp. nov. Fianarantsoa.

Pulchrijassus toamasinensis sp. nov. Toamasina.

Punctijassus gen. nov.

Punctijassus circularis sp. nov. Toliara.

Punctijassus compressus sp. nov. Toliara.

Punctijassus ivohibensis sp. nov. Toliara.

Key to genera of Platyjassini (males)

1. Dorsal coloration nearly uniformly yellow or light brown (or green in life), without distinct pattern consisting of numerous colored spots or larger maculae ( Fig 1AView Fig), at most with small black spot or dark infuscation near apex of forewing clavus or corium, or fuscous crown margin.........2

– Dorsal coloration not uniformly yellow or light brown, either mostly dark brown, red or black( Fig.1FView Fig), or with pattern consisting of numerous conspicuous spots or larger maculae ( Figs 1NView Fig, 3D, JView Fig).........8

2. Crown in dorsal view without acute anterolateral extension distinctly overlapping eye ( Figs 21AView Fig, 23BView Fig)....................................................................................................................................................3

– Crown in dorsal view with acute anterolateral extension distinctly overlapping eye ( Figs 22AView Fig, 23View Fig A–B)...............................................................................................................................................4

3. Frontoclypeus punctate, without transverse striations ( Fig. 23DView Fig) ............ Pallijassus gen. nov.

– Frontoclypeus transversely rugose ( Fig. 23EView Fig) ............................................ Plerujassus gen. nov.

4. Length of male 6.7 mm or less; aedeagus symmetrical or nearly so, or, if distinctly asymmetrical, with only distal processes present ( Figs 7DView Fig, 15EView Fig).................................................5

– Length of male> 6.7 mm; aedeagus either symmetrical with paired basal processes or distinctly asymmetrical, with single process arising from atrium and well separated from shaft ( Fig. 10FView Fig, except Platyjassus asymmetricus sp. nov. with asymmetrical process near shaft apex, Fig. 9CView Fig)......6

5. Hind coxa and apex of femur without black spot; male pygofer lobe often with sclerotized dorsal appendage or with apex emarginate ( Fig. 7E, OView Fig); style apophysis with numerous conspicuous denticuli ( Fig. 7B, FView Fig) ................................................................. Platyjassella gen. nov.

– Hind coxa and apex of femur each with distinct black spot ( Figs 3View Fig R–S, 23F); male pygofer lobe rounded distally, without processes ( Fig. 15AView Fig); style apophysis without distinct denticuli ( Fig. 15CView Fig) .................................................................................................. Punctijassus gen. nov.

6. Male style with two prominent acute projections apically (not foot-like, Fig. 8BView Fig); pygofer sometimes with ventral process ( Fig. 8HView Fig) ...................................................... Platyjassula gen. nov.

– Male style apex foot-like with short heel and more elongated toe ( Fig. 10DView Fig), or with single acute point ( Fig. 10KView Fig); pygofer without ventral process...............................................................7

7. Anterolateral extension of crown overlapping <½ of anterolateral margin of eye ( Figs 1AView Fig, 23AView Fig); hind coxa and apex of femur each with distinct black spot ( Fig. 23FView Fig); aedeagus with pair of long basal processes ( Fig. 4A, EView Fig) .......................................................... Pachyjassus gen. nov.

– Anterolateral extension of crown overlapping> ½ of anterolateral margin of eye ( Fig. 23BView Fig); hind coxa and apex of femur without black spots; aedeagus with basal process absent, or present but unpaired and asymmetrical ................................................... Platyjassus Evans, 1953

8. Vertex in dorsal view with acute lateral extension overlapping anterolateral margin of eye ( Figs 3C, JView Fig, 23BView Fig)..........................................................................................................................................9

– Vertex in dorsal view without acute lateral extension overlapping anterolateral margin of eye ( Figs 3D, IView Fig, 23FView Fig).........................................................................................................................................13

9. Body length including forewings 15 mm or more, head distinctly wider than pronotum .............. ................................................................................................................. Betsileonas Kirkaldy, 1903

– Body length including forewings <13 mm, head narrower than pronotum................................10

10. Dorsal color pattern consisting of symmetrical red spots or pale green transcommissural marking ( Fig. 1View Fig M–O); hindwing veins RP and MA confluent for short distance, then separate distally......11

– Dorsal markings not as above, usually consisting of distinct longitudinal stripes ( Fig. 3CView Fig, J–Q); hindwing veins RP and MA completely confluent distally...........................................................12

11. Dorsum with numerous conspicuous symmetrical red spots ........................ Pictojassus gen. nov.

– Dorsum with pale green transcommissural marking .................................... Petalojassus gen. nov.

12. Forewing vein R without supernumerary branches extended to costal margin, with extra crossveins usually present between veins R, M and CuA; dorsum usually with bold symmetrical pattern of dark and pale markings ( Fig. 3View Fig J–Q) ...................................................... Pulchrijassus gen. nov.

– Forewing vein R with one or more long supernumerary branches extended to costal margin, without extra crossveins between veins R, M. and CuA; dorsum nearly uniform dark brown or black ( Fig. 3CView Fig) .................................................................................................... Plexijassus gen. nov.

13. Forewing with numerous supernumerary crossveins ( Fig. 3FView Fig) .............. Pseudocurtara gen. nov.

– Forewing with, at most, 1–2 supernumerary crossveins ( Fig. 3View Fig G–I)...........................................14

14. Forewing mostly hyaline, appendix crenulate ( Fig. 3GView Fig); hind femur with supernumerary macrosetae ........................................................................................................................... Pseudocyrta gen. nov.

– Forewing membrane with extensive opaque sclerotization, appendix flat, not crenulate ( Fig. 3View Fig H–I); hind femur macrosetae 2+2 +1........................................................................................15

15. Crown with pair of round black spots posterad of ocelli, pronotum with anterior group of irregular black maculae ( Fig. 3View Fig H–I); aedeagus symmetrical, with pair of lateral spines closely paralleling shaft .................................................................................... Pseudomarganana gen. nov.

– Crown without pair of round black spots, pronotum unicolorous, without group of anterior maculae ( Fig. 1FView Fig); aedeagus usually asymmetrical, with spines variously arranged ..... Phaiojassus gen. nov.

Kingdom	Animalia
Phylum	Arthropoda
Class	Insecta
Order	Hemiptera
Family	Cicadellidae