Copelatus : GUEORGUIEV 1968
Creators: name: Megna, Yoandri S.
name: Epler, John H.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Dytiscidae
Copelatus

description: Key to Copelatus of Cuba   
1 Elytra with well-defined striae, either linear or undulating/anastomosing (Figs. 2–4, 8–10)............................................................................................................................ 2  
- Elytra mostly smooth, at most with longitudinal series of weak punctures (Figs. 1, 5, 6, 7)................................................................................................................................... 9  
2 Elytra with 5–10 well defined linear striae; males and females (Fig. 2–4, 8–10)......... 3  
 - Elytra striae fine, undulating/anastomosing; females 1 (Fig. 9)................................... 12   
3 Each elytron with 5 or 6 discal striae (Fig. 4)............................................................... 4  
- Each elytron with 10 discal striae (Fig. 8)..................................................................... 5  
 4 Each elytron with a posterolateral submarginal stria and 6 discal striae (Fig. 4)....................................................................................................... C. cubaensis Schaeffer, 1908   
 - Each elytron with a posterolateral submarginal stria and 5 discal striae......................................................................................................................... C. blatchleyi Young, 1953 (not recorded from Cuba, but may occur there due to its presence in Florida Keys and Bahamas)   
 5 Each elytron with striae 1, 3, 5, and 9 extending to apical third (Fig. 8). Body size larger, TL> 6.0 mm; EW> 3.0 mm......................................... C. posticatus (Fabricius, 1801)   
- Each elytron with all striae almost complete (Fig. 2); TL <6.5 mm............................ 6  
 6 Median lobe with apex similar to a bird head (Fig. 20a) (C. caelatipennis)................. 7   
- Median lobe of different shape, not similar to a bird head........................................... 8  
 7 Pronotum in both sexes usually without strioles on disc, if strioles are present, they are restricted to pronotal sides...................... C. caelatipennis angustatus Chevrolat, 1863   
 - Pronotum in both sexes usually with short strioles on disc........................................................................................................................ C. caelatipennis princeps Young, 1963   
 8 Male protibia with two ventrobasal emarginations; median lobe with outside margin abruptly expanded at midlength (Figs. 21a, b); parameres broad, with short setae on inner margin (Fig. 21c); female with interstrial space mostly smooth.....  C. cordovai sp. nov.    
 - Male protibia without emarginations ventrobasally; median lobe with inner margin strongly concave at midlength (Fig. 11a); parameres narrow, with long setae on inner margin (Fig. 11c); female with interstrial space with minute, complex striation (Fig. 9)...............................................................................................................  C. danyi sp. nov.    
 9 Larger, TL = 5.9– 6.3 mm; elytra with apical fasciae reduced (Fig. 1)............................................................................................................................. C. barbouri Young, 1942   
- Smaller, TL = 5.3–5.9 mm; elytra with apical fasciae large (Figs. 5–7)..................... 10  
 10 Male protibiae not modified, their posterior margin straight (Fig. 17).......................................................................................................................... C. darlingtoni Young, 1942   
- Male protibiae modified, their anterior margin weakly to strongly bowed, posterior margin with ventrobasal emargination (Fig. 18)..................................................................... 11  
 11 Elytra fusco-testaceous with base and apex lighter (Fig. 6); median lobe with apex strongly curved in lateral aspect (Fig. 14a)...................................... C. insolitus Chevrolat, 1863   
 - Elytra fuscous with well-defined basal markings and testaceous apex (Fig. 7); median lobe with apex slightly curved in lateral aspect (Fig. 15a)........... C. montivagus Young, 1942   
 1 Identification of isolated females is problematic/impossible.
description: Published as part of Megna, Yoandri S. & Epler, John H., 2012, A review of Copelatus from Cuba, with the description of two new species (Coleoptera: Dytiscidae: Copelatinae), pp. 383-410 in Acta Entomologica Musei Nationalis Pragae 52 (2) on page 387, DOI: 10.5281/zenodo.5331014