Hydrocanthus marmoratus Sharp, 1882

Scheers, Kevin & Thomaes, Arno, 2014, A review of the Burrowing Water Beetles of Belize with a key to the species (Coleoptera: Noteridae), Belgian Journal of Entomology 51, pp. 1-17 : 1-17

Hydrocanthus marmoratus Sharp, 1882

( Figs 1B , 2B , 3B )

TYPE LOCALITY. Guatemala, Escuintla district, Paso Antonio .

MATERIAL EXAMINED. TOLEDO: Bladen NR, pond savannah, 16°31'11,7"N, 88°42'3,8"W, 19.IV.2015, Leg. K. Scheers & A. Thomaes (4ex.) ; Bladen NR, pond transition savannah-forest, 16°32'26,3"N, 88°42'57,1"W, 20.IV.2015, Leg K. Scheers & A. Thomaes (6ex.); Punta Gorda , fishpond, 16°06'24,6"N, 88°48'25,5"W, 13.IV.2015, Leg. K. Scheers & A. Thomaes (6ex) ; Punta Gorda , fishpond, 16°06'24,6"N, 88°48'25,5"W, 23.IV.2015, Leg. K. Scheers & A. Thomaes (16ex) ; Punta Gorda , pond edge forest, 16°06'30,6"N, 88°48'24,5"W, 13.IV.2015, Leg. K. Scheers & A. Thomaes (2ex.) ; Punta Gorda , small stream, 16°05'17,8"N, 88°52'4"W, 25.IV.2015, Leg. K. Scheers & A. Thomaes (2ex.) ; Punta Gorda , puddle in temporary marsh, 16°05’19,3”N, 88°52’3,7”W, 25.IV.2015, Leg. K. Scheers & A. Thomaes (1ex.) ; Indian Creek, Lake of former Lodge , 16°18'45,1"N, 88°49'31,4"W, 29.IV.2015, Leg. K. Scheers & A. Thomaes (7ex.) ; Big Falls , pool between rocks, 16°15'22,2"N, 88°53'14"W, 29.IV.2015, Leg. K. Scheers & A. Thomaes (1ex.) ; Punta Gorda , shallow pool, 16°05'19,7"N, 88°48'53,4"W, 05. V.2015, Leg. K. Scheers & A. Thomaes (2ex.) .

Published records from Belize: This species is newly recorded from Belize.

DIAGNOSIS. TL = 4.1–4.7 mm; dorsal color reddish brown with elytra marmorate but sometimes very indistinct; elytra usually slightly darker than head and pronotum ( Fig. 1B ); male genitalia with aedeagus somewhat thickened in lateral view and with only a very small indistinct hook ( Fig. 2B ). This species can only be confused with Hydrocanthus debilis , but it is larger and easily recognized by its male genitalia.

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DISTRIBUTION. (NT) Belize (first records), Costa Rica, Guatemala, Mexico, Panama.

HABITAT. H. marmoratus was most frequently encountered in exposed lentic habitats, both permanent and temporary. It occurs in marshy areas and shallow well vegetated ponds and also occupies the vegetated edges of more open ponds.

Figures

Fig. 1. Dorsal view of the species of Noteridae in Belize. A, Hydrocanthus debilis Sharp, 1882; B, Hydrocanthus marmoratus Sharp, 1882; C, Mesonoterus laevicollis Sharp, 1882; D, Suphisellus insularis (Sharp, 1882); E, Suphisellus lineatus (Horn, 1871); F, Suphisellus neglectus Young, 1979; G, Suphisellus nigrinus (Aubé, 1838); H, Suphisellus varians (Sharp, 1882); I, Notomicrus sharpi J. Balfour-Browne, 1939.

Fig. 2. Left lateral view of the aedeagus. A, Hydrocanthus debilis Sharp, 1882; B, Hydrocanthus marmoratus Sharp, 1882; C, Suphisellus insularis (Sharp, 1882); D, Suphisellus lineatus (Horn, 1871); E, Suphisellus neglectus Young, 1979; F, Suphisellus nigrinus (Aubé, 1838); G, Suphisellus varians (Sharp, 1882); H, Notomicrus sharpi J. Balfour-Browne, 1939.

Fig. 3. Distribution maps of the species of Noteridae in Belize. A, Hydrocanthus debilis Sharp, 1882; B, Hydrocanthus marmoratus Sharp, 1882; C, Mesonoterus laevicollis Sharp, 1882; D, Suphisellus insularis (Sharp, 1882); E, Suphisellus lineatus (Horn, 1871); F, Suphisellus neglectus Young, 1979; G, Suphisellus nigrinus (Aubé, 1838); H, Suphisellus varians (Sharp, 1882); I, Notomicrus sharpi J. Balfour-Browne, 1939 (white dots indicate sampled sites and black dots indicate sites where the species is recorded, elevation map as background in which dark shading increases with height).