Hydraena manabica, Perkins, Philip D., 2011

Perkins, Philip D., 2011, New records and description of fifty-four new species of aquatic beetles in the genus Hydraena Kugelann from South America (Coleoptera: Hydraenidae), Zootaxa 3074, pp. 1-198 : 62

Hydraena manabica , new species

Figs. 127 (habitus), 129 (aedeagus), 182 (spermatheca), 203 (map)

Type Material. Holotype (male): Ecuador: Manabi, 38 km E. of Portoviejo, collected in splash zone at waterfall, 1° 4' S, 80° 10' W, 11 v 1975, Spangler, Langley, Cohen. Deposited in the USNM. Paratypes: Same data as holotype (3 USNM).

Differential Diagnosis. A broad, darkly colored species, with relatively short elytra. Similar to H. cochabamba in dorsal habitus, in having the mesoventral intercoxal process very narrow, and lacking plaques ( Figs. 127 , 130 ); differentiated therefrom by the smaller size (ca. 1.44 mm vs. 1.59 mm), the relatively shorter elytra (L/W ca. 1.27 vs. 1.39), and the differently shaped pronotum. The male genitalia of the two species distinctively differ in details, while showing some basic plan similarities ( Figs. 129, 132).

Description. Size: holotype (length/width, mm): body (length to elytral apices) 1.44/0.66; head 0.24/0.38; pronotum 0.36/0.53, PA 0.43, PB 0.45; elytra 0.84/0.66. Dorsum of head piceous; pronotum dark brown to piceous, darkest on disc; elytra dark brown; legs brown; maxillary palpi light brown, tip not darker. Body form broad, with relatively short elytra.

Frons punctures near eyes ca. 1.5xef, smaller and sparser medially; interstices shining, ca. 1xpd laterally, 2– 4xpd medially. Clypeus microreticulate laterally, very finely sparsely punctulate medially. Mentum moderately coarsely, moderately densely punctulate, interstices shining; postmentum very sparsely punctulate, nitid. Genae raised, shining, without posterior ridge.

Pronotum weakly arcuate laterally; anterior margin straight behind eyes, emarginate behind frons, scintilla absent; punctures on disc ca. 1xpd largest punctures on frons, interstices shining, 2–4xpd medially, punctures larger and denser at anterior, posterior and laterally; PF1, PF2 and PF4 absent; PF3 moderately deep.

Elytra moderately arcuate laterally; summit of posterior declivity before midlength; lateral explanate margins moderately wide; on basal 1/3 punctures ca. 1xpd largest pronotal punctures, punctures becoming finer and more widely spaced toward posterior. Intervals not raised, shining, on basal 1/3 ca. 1–2xpd, as are interstices between punctures of a row, a few punctures subserial. Apices in dorsal aspect conjointly rounded, in posterior aspect margins forming shallow angle with one another.

P1 laminate; median carina sinuate in profile. P2 very narrow, l/w ca. 5/1, sides slightly diverging toward blunt apex. Plaques absent. Metaventrite with median area deeply concave. AIS width at straight posterior margin ca. 3.5x P2. Legs short and stout. Protibia wide, tapering from about midlength to apex, distal 1/2 with short spines along median margin. Mesotibia with row of short stout spines along lateral and medial margins. Metatibia straight, medial margin with short spines. Male abdominal apex very slightly, if at all, asymmetrical. Female (microslide mount, n=1): last tergite broadly rounded, with moderately deep apicomedian notch, ca. 14 short and thick, closely spaced, hooked setae, not attaining free margin; gonocoxite not midlongitudinally divided, apical margin sharply rounded, low transverse ridge evident at border of microreticulation; spermatheca type C1.

Etymology. Named in reference to the type locality.

Distribution. Currently known only from the type locality ( Fig. 203).

Figures

FIGURE 127. Hydraena manabica, holotype, dorsal and lateral habitus, and venter.

FIGURE 130. Hydraena cochabamba, holotype, dorsal and lateral habitus, and venter.