Hydraena decui Spangler, 1980

DELER-HERNÁNDEZ, ALBERT & DELGADO, JUAN A., 2012, The Hydraenidae of Cuba (Insecta: Coleoptera) I: Contribution to the fauna of eastern Cuba, Zootaxa 3478 (1), pp. 213-238 : 218

Hydraena decui Spangler, 1980

( Figs. 4 , 10 , 14, 19, 20 , 38, 39 , 48, 49 , 58 , 61 )

Hydraena decui Spangler, 1980: 329 .— Perkins, 1980: 144.— Spangler, 1981: 162.— Jäch et al. 2000: 80.— Peck, 2005: 55.

Diagnosis: Habitus as in Fig. 14. Male terminalia: Ventrite VII as in Fig. 10 , subrectangular, with distal margin rounded; spiculum gastrale long, narrow and distally curved, firmly attached to ventrite. Terminal tergite ( Fig. 4 ) reniform. Female terminalia: Gonocoxite ( Fig. 19 ) with outer plate rather symmetrical, anterolateral condyles moderately large and a pair of subapical setal tufts. Inner plate slightly asymmetrical with two impressions, one subrounded and the other quite complex in shape and irregular outline. Last tergite as in Fig. 20 . Male genitalia as in Figs. 38–39 . Spermatheca: As in Figs. 48–49 , angulate in lateral view. Spermathecal duct long and slender. For a detailed external description consult Perkins (1980: 144).

Material examined: Santiago de Cuba: 1 male, 4 females (in alcohol) ( BSC-E); 1 male (dry-mounted) ( CUMS): “CUBA: Santiago de Cuba / Res. [erva] Ecológica Loma del Gato / 20º00’44,6’’N 76º02’53,0’’W, 800 m / 26-VI-2009, coll.: A. Deler-Hernández & F. Cala-Riquelme ”. 1 male (dry-mounted) ( CUMS): “CUBA: Santiago de Cuba / Río Turquino , Los Morones / 19º58’33,6’’N 76º46’4,8’’W, 200 m / 19-VI-2008, coll.: J. C. Salazar ”. 8 males, 14 females ( BSC-E, CUMS): “CUBA: Santiago de Cuba / Gran Piedra, 26-IX-2010 / 20º00’22’’N 75º36’56’’W, 1120 m / coll.: A. Deler-Hernández ”. 7 males, 5 females (in alcohol) ( BSC-E): “CUBA: Santiago de Cuba / Gran Piedra, 11-V-2010, arroyo stream] / 20º00’22’’N 75º36’56’’W, 1120 m / coll.: A. Deler-Hernández ” .

Guantánamo: 3 males, 7 females (in alcohol) ( BSC-E, CUMS): “ CUBA: Santiago de Cuba / Yunque de Baracoa , remanso [backwater] / 20º19’46,2’’N 74º35’34,08’’W, 540 m / 28/ 30-I-2010, coll.: A. Deler- / Hernández & F. Cala-Riquelme ” .

Distribution: Currently known from eastern Cuba ( Fig. 58 ).

Habitat: A typical inhabitant of well preserved mountain streams from 200 to 1020 m a.s.l. It has been collected mainly among stones and mud in sheltered shaded areas ( Fig. 61 ).

Figures

FIGURES 2–7. Terminal male tergite. 2, Gymnochthebius fossatus. 3, Ochthebius attritus. 4, Hydraena decui. 5, H. perkinsi. 6, H. guadelupensis. 7, H. franklyni. Scale = 0.1 mm.

FIGURES 8–13. Male ventrite VII and speculum gastrale. 8, Gymnochthebius fossatus. 9, Ochthebius attritus. 10, Hydraena decui. 11, H. franklyni. 12, H. guadelupensis. 13, H. perkinsi. Scale = 0.1 mm.

FIGURES 15–20. Gonocoxite and last female tergite. 15, gonocoxite of Gymnochthebius fossatus. 16, last female tergite of G. fossatus. 17, gonocoxite of Ochthebius attritus. 18, last female tergite of O. attritus. 19, gonocoxite of Hydraena decui. 20, last female tergite of H. decui. Scale = 0.1 mm.

FIGURES 36–39. Male genitalia. 36, Hydraena perkinsi (lateral view). 37, H. perkinsi (ventral view). 38, H. decui (lateral view). 39, H. decui (ventral view). Scale = 0.1 mm.

FIGURES 45–55. Spermathecae. 45, G.fossatus(lateral view). 46, G. fossatus (ventral view). 47, O. attritus (ventral view). 48, H. decui (lateral view). 49, H. decui (ventral view). 50, H. franklyni (lateral view). 51, H. franklyni (ventral view). 52, H. guadelupensis (lateral view). 53, H. guadelupensis (ventral view). 54, H. perkinsi (lateral view). 55, H. perkinsi (ventral view). Scale = 0.1 mm.

FIGURES 56–58. Distribution maps for all species of Hydraenidae in eastern Cuba. 56, squares = G. fossatus, circles = O. attritus. 57, squares = H. franklyni, circles = H. guadelupensis. 58, squares = H. decui, circles = H. perkinsi.

FIGURES 59–61. Habitats of Hydraenidae species. 59, habitat and type locality of H. franklyni. Gran Piedra, Santiago de Cuba (Photo by A. Deler-Hernández, 04-III-2012). 60, habitat of G.fossatus and H. perkinsi. Temporary pool, Dos Caminos, San Luis, Santiago de Cuba (Photo by A. Deler-Hernández, 20-VII-2011). 61, habitat of H. decui. Stream, Gran Piedra, Santiago de Cuba (Photo by L. O. Mélian, 09-XI-2011).