Heterogamodes, Chopard, 1929

Bohn, Horst, 2024, The spine armament of the legs as an important means for the characterisation of the genera of Corydiinae and their relationships (Blattodea, Corydiidae), Zootaxa 5482 (1), pp. 1-79 : 28-29

Determination key for the males of the genus Heterogamodes

1 Midtibia armament with seven dorsal and seven apical spines [7.7.1] (Subgen. Atuberculoblatta )...................................................................................... Heterogamodes (Atuberculoblatta) intermedia

- Midtibia armament with six dorsal and eight apical spines [6.8.n]............................................... 2

2 Mid- and hindfemora without an apical spine.............................................................. 10

- Mid- and hindfemora with an apical spine (Subgen. Heterogamisca, Cerverae -species group)......................... 3

3 Hindtibia with 8 dorsal spines [8.7.3–4].................................. Hetrogamodes (Heterogamisca) arenarum

- Hindtibia with more than 8 dorsal spines................................................................... 4

4 Hindtibia with 9 dorsal spines [9.7.4]; wings shortened, surpassing the abdominal end by less than 5 mm .......................................................................... Heterogamodes (Heterogamisca) brevipennis , sp. nov.

- Hindtibia with 10 or 11 dorsal spines; wings not shortened, surpassing the abdominal end by more than 5 mm ............ 5

5 Dorsal spines of midtibia and ventral spines of the hindtibia immediately adjacent to the spines of the respective apical whorl, separated by less than half of the spine length, the ventral spines of the hindtibia arranged close together fairly in one longitudinal line, armament of hindtibia [9/10.7.4].................................... Heterogamodes (Heterogamisca)zavattari

- Dorsal spines of midtibia and ventral spines of the hindtibia at a distance from the respective apical whorl, the latter pairwise approached, but pairs widely separated from each other and from the apical whorl.................................. 6

6 Tegmina completely transparent without any darkening, costal field whitish ( Fig. 20G ); armament of hindtibia [(8–)10.7.4(5)].................................................................. Heterogamodes (Heterogamisca) cerverae

- Tegmina at least darkened along the subcosta............................................................... 7

7 Pronotum lightly coloured: disk light ochre, laterally near the anterior border on both sides with a whitish patch, remaining parts transparent, tegmina almost completely transparent, subcosta darkened, brownish; armament of hindtibia [(11)10.7.4(3]................................................................. Heterogamodes (Heterogamisca) pallens , sp. nov.

- Pronotum at least with a darker, brownish disk, tegmina darker................................................. 8

8 Posterior half of pronotum dark, sometimes in the middle (disk) lightened; size rarely more than 20 mm; armament of hindtibia [(9)10.7.4].......................................................... Heterogamodes (Heterogamisca) dumonti

- Disk darkest part of the pronotum; size always more than 20 mm ............................................... 9

9 Disk of pronotum rather dark brown, often with very distinct darker maculae; tegmina towards the costal field strongly darkly marbled; armament of hindtibia [(10)11.7.4]............................ Heterogamodes (Heterogamisca) senegalensis

- Disk lighter coloured, reddish brown; tegmina indistinctly marbled; armament of hindtibia [10.7.4].................................................................................... Heterogamodes (Heterogamisca) zolotarevskyi

10 Midtibia armament without a ventral spine [6.8.0], with 3 ventral spines on the hindtibia, arranged in an oblique row (Subgenus Heterogamodes )...................................................... Heterogamodes (Heterogamodes) ursina

- Midtibia armament with one ventral spine [6.8.1], with four (rarely five) ventral spines on the hindtibia arranged in two prallel rows (Subgenus Heterogamisca , bolivari- species group)..................................................... 11

11 Pronotum mainly lightly coloured, only lateral and posterior margin partly tinged with. brown ( Fig. 21B ); tegmina apart from whitish costal field completely transparent; armament of hindtibia [10.7.4]..................................................................................................... Heterogamodes (Heterogamisca) sulcata , sp. nov.

- Pronotum with at least posterior 2/3 brown ( Fig. 21A ); tegmina variously brownish coloured........................ 12

12 Hindtibia with 9 or 10 dorsal spines [9–10.7.4]............................................................. 14

- Hindtibia with 8 dorsal spines [8·7·4].................................................................... 13

13 Pronotum uniformly medium brown; tegmina very broad, anterior and posterior border regularly rounded, costal field only at the base with a small lighter patch, length 17.5 mm ( Fig. 20A )................ Heterogamodes (Heterogamisca) adelungi

- Pronotum with a broad lightly (yellowish and transparent) coloured anterior margin, posteriorly brown; tegmina elongate, anterior border at 1/3 of the length obtuse angularly deflected, posteriorly followed by a shallow concavity, costal field completely whitish transparent, length 15 mm ( Fig. 20C )...................... Heterogamodes (Heterogamisca) bolivari

14 Tegmina (apart from the whitish transparent costal field) dark brown, towards the apex slightly lightened, not marbled ( Fig. 20D ); pronotum in the posterior brown area with a pair of small yellow spots; armament of hindtibia [10·7·4]............................................................................. Heterogamodes (Heterogamisca) bifoveolata

- Tegmina mainly pale brown or transparent, indistinctly darker marbled; pronotum without yellowish spots in the posterior brown area......................................................................................... 15

15 Discoidal field (Medio-Cubital field) of tegmina with about 16 branches of veins, transparent anal furrow not broadening -distally ( Fig. 20E ); ventral surface of femora without tiny spicules ( Fig. 2E ); hindtibiae with rather long bristles surpassing the length of the spines ( Fig. 2A ); armament of hindtibia [(9)10·7·4], the two most proximal ventral spines inserted at some distance in an oblique line.................................... Heterogamodes (Heterogamisca) longipilosa , sp. nov.

- Discoidal field of tegmina with about 19 branches of veins, transparent anal furrow distally broadening ( Fig. 20B ); ventral surface of hindfemora with numerous tiny spinules ( Fig. 2C,D ); hindtibia with shorter bristles, mostly shorter than the spines ( Fig. 2B ); armament of hindtibia [9·7·4], the two most proximal ventral spines inserted immediately side by side........................................................................... Heterogamodes (Heterogamisca) jeffreyana

Figures

FIGURE 2. Leg structures. A–E: Distinguishing features between the species Heterogamisca longipilosa, Holotype: A, proximal part of left hindtibia, E left hindfemur, both mirror images,—and H. jeffreyana, Holotype: B, proximal part of right hindtibia, C right hindfemur, arrows delimit the area shown in higher enlargement in D. Notice the longer bristles on the tibia of H. longipilosa, and the tiny spinules along the anterio-ventral edge of the hindfemur in H. jeffreyana, which are missing in the other species. F: Right hindtibia of the female of Nymphrytria mirabilis (specimen from Erg er Raoui, view on the anterior surface), showing the row of five large spines along the ventral edge of the broadened tibia, row formed by four ventral (ve) and one apical spine (a). At the bottom parts of the leg from the other side are visible. G: Left midtibia of the same specimen (view on anterio-dorsal surface), the seven dorsal spines (do) arranged in two longitudinal rows, the row at the right is completed by one apical spine.—Further abbreviations: Fe femur, Ti tibia, Ta tarsus.—Enlargements: Scale in D 0.2 mm, in all others 0.5 mm.

FIGURE 20. Left tegmen of male.—Species: A: Heterogamisca adelungi, Holotype; B: H. jeffreyana, Holotype; C: H. bolivari, Syntype (same specimen as used for prep. Bo1359); D: H. bifoveolata, Lectotype; E: H. longipilosa, Holotype; F: H. brevipennis, Holotype; G: H. cerverae (same specimen as used for prep. Bo 1365). The tegmina are photographed from microscopical preparations with transmitted light; the black netlike markings in the costal field are in reallity intransparent whitish deposits.—Enlargements: Scale 3 mm, same for all figures.

FIGURE 21. Pronota of some species of the genus Heterogamodes. Species: A: Heterogamisca longipilosa, Paratype; B: H. sulcata, Holotype (Bo 1417); C: H. cerverae (Bo 1360); D: H. pallens, Holotype; E: H. senegalensis (Bo 1419); F: H. zolotarevskyi (Bo 1418). Transparent parts of the pronotum appear dark due to the dark background; it mainly concerns a relatively large area mesally at the anterior margin, in (B) additionally an apparently dark band at the lateral margins. Preparation numbers between parentheses indicate that the same specimen was also used for the production of microscopical preparations.— Enlargements: Scale 2 mm.