Gymnochthebius fossatus ( LeConte, 1855 )

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 : 215-216

Gymnochthebius fossatus ( LeConte, 1855)

( Figs. 1, 2 , 8 , 15, 16 , 43–46 , 56 , 60 , 63 )

Ochthebius fossatus LeConte, 1855: 362 .— Spangler, 1981: 163. Ochthebius tuberculatus LeConte, 1878: 380 . Synonymy: Fall, 1919: 213. Ochthebius foveicollis LeConte, 1878: 381 . Synonymy: Fall, 1919: 213.— Leng & Mutchler, 1917: 100. Ochthebius parvulus Sharp, 1882: 91 . Synonymy: Perkins, 1980: 277. Ochthebius nutiduloides Orchymont, 1943: 43 . Synonymy: Perkins, 1980: 277. Gymnochthebius falli Perkins, 1980: 281 . Synonymy: Jäch, 1994: 307. Gymnochthebius fossatus ( LeConte, 1855) — Perkins, 1980: 277.— Jäch, 1994: 307.— Delgado et al. 1995: 15.— Peck, 2005:

55.— Pérez-Gelabert, 2008: 85.— Deler-Hernández & Cala-Riquelme, 2010: 73.— Epler, 2010: 10.4.— Valladares & Short,

2011: 64.

Diagnosis: Habitus as in Fig. 1. Male terminalia: Ventrite VII ( Fig. 8 ) piriform, with pronounced anterior angles, spiculum gastrale short, firmly and broadly attached to ventrite. Terminal tergite as in Fig. 2 . Female terminalia: Gonocoxite ( Fig. 15 ) rather simple, with outer plate symmetrical, anterolateral condyles small and apical setae short and slender; inner plate without impressions or cavities. Last tergite oval, as in Fig. 16 . Male genitalia as in Figs. 43–44 . Spermatheca: wide, of approximately similar width along its length, spermathecal duct wide and sinuous, as in Figs. 45–46 . For a detailed external description see Perkins (1980: 279).

Material examined: Las Tunas: 1 female (in alcohol) ( BSC-E); 4 males, 6 females (dry-mounted) ( CUMS): “CUBA: Las Tunas. Las Cuarenta / 20º00’9,72’’N 76º57’48,6’’W, 100 m / 27-XI-2004, arroyo [stream] / coll.: Y. S. Megna ”. 2 males (in alcohol) ( BSC-E): “CUBA: Las Tunas / Comunales, Amancio / 20º49’17,7’’N 77º34’40,8’’W, 50 m / 16-I-2009, Laguna temporal [temporary pool] / coll.: Y. S. Megna ” . Granma: 6 males, 21 females (in alcohol) ( BSC-E): “CUBA: Granma / Cauto Cristo, Río Arroyón / 20º33’26,28’’N 76º28’44’’W, 44 m / 25/ 27-XI-2004 / coll.: L. Chávez ”. 8 males, 17 females (in alcohol) ( BSC-E); 6 males, 8 females (dry-mounted) ( CUMS): “CUBA: Granma / Cauto Cristo, Laguna permanente [permanent pool] / 20º33’33,1’’N 76º28’44’’W, 44 m / 04-I-2005 / coll.: L. Chávez ”. 12 males, 11 females (in alcohol) ( BSC-E): “CUBA: Granma / Cauto Cristo, Laguna permanente [permanent pool] / 20º33’33,1’’N 76º28’44’’W, 44 m / 11-I-2005 / coll.: L. Chávez ” . Santiago de Cuba: 2 males (in alcohol) ( BSC-E): “CUBA: Santiago de Cuba / Embalse Chalons / 20º4’13,8’’N 75º48’48,9’’W, 109 m / 06-III-2005 / coll.: Y. S. Megna ”. 12 females (in alcohol) ( BSC-E): “CUBA: Santiago de Cuba / Dos Caminos / 20º11’2,50’’N 75º46’17,7’’W, 150 m / 25-IV-2008, laguna temporal [temporary pool] / coll.: A. Deler-Hernández ”. 7 males, 5 females (in alcohol) ( BSC-E); 5 females (dry-mounted) ( CUMS): “CUBA: Santiago de Cuba / Dos Caminos / 20º11’2,50’’N 75º46’17,7’’W, 150 m / 14-V-2008, laguna temporal [temporary pool] / coll.: A. Deler-Hernández ”. 2 males, 10 females (in alcohol) ( BSC-E): “CUBA: Santiago de Cuba / Monte Barranca / 20º20’13,5’’N 76º1’11,6’’W, 203 m / 21-XII-2008, arroyo [stream] / coll.: A. Deler-Hernández & F. Cala-Riquelme ”. 6 males, 8 females (in alcohol) ( BSC-E): “CUBA: Santiago de Cuba / Río Sevilla , La Redonda / 20º00’54,3’’N 75º45’45,6’’W, 15 m / 17-V-2009 / coll.: A. Deler-Hernández ”. 8 males (in alcohol) ( BSC-E): Same locality 07-X-2009. 7 males (in alcohol) ( BSC-E): Same locality 02-XI-2009. 1 male (in alcohol) ( BSC-E): “Gran Piedra / La Sofía / 19º59’5,64’’N 75º35’23,6’’W, 770 m / 28-I-2012 / arroyo [stream] / coll.: A. Deler-Hernández ” .

Guantánamo: 6 males, 11 females (in alcohol) ( BSC-E): “ CUBA: Guantánamo / Baracoa / Nibujón / 20º30’8,6’’N 74º38’88’’W, 8 m / 03-II-2010, laguna temporal [temporary pool] / coll.: A. Deler-Hernández & R. Correa ” .

Distribution: USA, México, Guatemala, Honduras, Nicaragua, Colombia, Venezuela, Argentina, Jamaica, Hispaniola, Puerto Rico and Cuba ( Perkins 1980; Delgado et al. 1995; Peck 2005; Pérez-Gelabert 2008; Valladares & Short 2011). In Cuba, known from the eastern region only ( Fig. 56 ).

Habitat: Perkins (1980) suggested that this species is adapted to lotic environments. In eastern Cuba, it was collected in shallow margins of a wide range of aquatic habitats, from clear permanent running streams ( Fig. 63 ) to standing temporary water bodies with abundant organic matter ( Fig. 60 ). This species is mostly found at low altitudes, ranging from sea level to 100 m a.s.l., although it has also been collected at approximately 770 m a.s.l.

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 41–44. Male genitalia. 41, Ochthebius attritus (lateral view). 42, O. attritus (ventral view). 43, Gymnochthebius fossatus (lateral view). 44, G. fossatus (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).

FIGURES 62–64. Habitat of Hydraenidae species. 62, habitat of H. guadelupensis. Stream, protected area “Loma del Gato”, Santiago de Cuba (Photo by J. Lastre, 27-I-2011). 63, habitat of G. fossatus and H. perkinsi. Sevilla River, La Redonda, Santiago de Cuba (Photo by A. Deler-Hernández, 20-VII-2011). 64, habitat of O. attritus. Temporary pool, Humedal San Miguel de Parada, Santiago de Cuba (Photo by F. Cala-Riquelme, 15-VI-2009).