Copelatus

Sheth, Sayali D., Ghate, Hemant V. & Hájek, Jiří, 2018, Copelatus Erichson, 1832 from Maharashtra, India, with description of three new species and notes on other taxa of the genus (Coleoptera: Dytiscidae: Copelatinae), Zootaxa 4459 (2), pp. 235-260: 251-252

publication ID

https://doi.org/10.11646/zootaxa.4459.2.2

publication LSID

lsid:zoobank.org:pub:73510C3B-6482-4760-8173-B6E701839940

persistent identifier

http://treatment.plazi.org/id/03BC3747-FF8B-FF82-FF5E-14B5FA64FE47

treatment provided by

Plazi

scientific name

Copelatus
status

 

Key to Copelatus  species of Maharashtra 

1. Body elongate oval; elytra with more than six dorsal striae..................................................... 2

- Body broadly oval; elytra with six dorsal striae.............................................................. 4

2. Elytra with 11–12 dorsal striae ( C. nigrolineatus  group)....................................................... 3

- Elytra with 9 dorsal striae ( C. consors  group). Base of pronotum distinctly wider than width of elytra; elytra completely striolate ( Fig. 4 View Figure )................................................................... Copelatus maushomi  sp. nov.

3. Bigger species (TL: 5.3–6.9 mm), elytra ochre unicolorous; elytral striae well impressed complete ( Figs 1–2 View Figure ). Median lobe in lateral aspect broad in basal three fourths, then narrowing to pointed apex; almost evenly curved except at base ( Fig. 17 View Figure )................................................................................ Copelatus deccanensis  sp. nov.

- Smaller species (TL: 4.0– 4.5 mm), elytra bicolorous with broad pale transverse basal band; elytral striae shallowly impressed, absent from apical fourth of elytral length ( Fig. 3 View Figure ). Median lobe in lateral aspect broad from base to apex, broader in apical half, apex abruptly pointed; not evenly curved ( Fig. 19 View Figure )............................ C. schuhi Hendrich & Balke, 1998 

4. Elytra with submarginal stria ( C. irinus  group).............................................................. 5

- Elytra without submarginal stria ( C. duodecimstriatus  group)................................................... 8

5. Median lobe in lateral view with two distinct 'teeth' on ventral side ( Figs 23, 29 View Figure ).................................... 6

- Median lobe simply sickle-shaped, without any 'teeth' on ventral side ( Figs 25, 27 View Figure ).................................. 7

6. Median lobe in apical third almost straight on dorsal side with distinctly dorsally bent apex ( Fig. 23 View Figure ); parameres smooth on inner side ( Fig. 24 View Figure )............................................................... Copelatus bezdeki  sp. nov.

- Median lobe in apical third almost regularly sinuous with shallow emargination before apex on ventral side ( Fig. 29 View Figure ); parameres with distinct serration on inner side ( Fig. 30 View Figure ).................................. C. schereri Wewalka, 1981 

7. Slender species with dorsal coloration uniformly dark except for lateral margin ( Figs 7–8 View Figure ). Elytral stria 1 starts at base. Median lobe in apical third gradually narrowing to pointed apex ( Fig. 25 View Figure )............................... C. indicus Sharp, 1882 

- Broader species with variable, but distinct yellow-black elytral coloration ( Figs 9–11 View Figure ). Elytral stria 1 starts subbasally. Median lobe in apical third broad with dorsally bent obtusely pointed apex ( Fig. 27 View Figure ).................. C. neelumae Vazirani, 1973 

8. Smaller species (TL: 3.7–4.2 mm). Median lobe almost evenly curved throughout, except basal fourth; apex narrowly pointed ( Fig. 31 View Figure ).................................................................. C. cryptarchoides Régimbart, 1899 

- Bigger species (TL: 4.9–5.6 mm). Median lobe broad in basal two thirds, almost straight and narrowing to pointed apex in apical fourth ( Fig. 33 View Figure ).............................................................. C. mysorensis Vazirani, 1970