Copelatus, : GUEORGUIEV, 1968

Megna, Yoandri S. & Epler, John H., 2012, A review of Copelatus from Cuba, with the description of two new species (Coleoptera: Dytiscidae: Copelatinae), Acta Entomologica Musei Nationalis Pragae 52 (2), pp. 383-410 : 387

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.

Figures

Figs.1–8. Habitus and color patterns of Copelatus species from Cuba.1 – C.barbouri Young, 1942; 2 – C. caelatipennis angustatus Chevrolat, 1863; 3 – C. cordovai sp. nov.; 4 – C. cubaensis Schaeffer, 1908; 5 – Copelatus darlingtoni Young, 1942; 6 – C. insolitus Chevrolat, 1863; 7 – C. montivagus Young, 1942; 8 – C. posticatus (Fabricius, 1801).

Figs. 9–11. Copelatus danyi sp. nov. 9 – female habitus; 10 – male habitus; 11 – male genitalia (a – median lobe in right lateral view; b – same in left lateral view; c – left paramere in lateral view).

Figs. 20–23. Male genitalia of Cuban species of Copelatus. 20 – C. caelatipennis angustatus author, year; 21 – C. cordovai sp. nov.; 22 – C. cubaensis Schaeffer, 1908; 23 – C. posticatus (Fabricius, 1801). Parts of male genitalia: a – median lobe of aedeagus in left lateral view, b – left paramere in lateral view.

Figs. 12–19. Male genitalia (12–15) and left protibia (16–19) of Cuban species of Copelatus. 12, 16 – C. barbouri Young, 1942; 13, 17 – C. darlingtoni Young, 1942; 14, 18 – C. insolitus Chevrolat, 1863; 15, 19 – C. montivagus Young, 1942. Parts of male genitalia: a – median lobe of the aedeagus in left lateral view, b – same in ventral lateral view, c – left paramere in lateral view.