Incoltorrida zahamena, Perkins & Bergsten, 2019

Perkins, Philip D. & Bergsten, Johannes, 2019, New Myxophagan water beetles from Madagascar (Coleoptera: Torridincolidae, Hydroscaphidae), Zootaxa 4657 (1), pp. 57-96 : 76-80

publication ID	https://doi.org/ 10.11646/zootaxa.4657.1.2
publication LSID	lsid:zoobank.org:pub:F27CB967-C001-436A-9F25-184D5484363C
DOI	https://doi.org/10.5281/zenodo.5934257
persistent identifier	https://treatment.plazi.org/id/AD076747-FFC1-FFD4-FF6D-FA48B16B905F
treatment provided by	Plazi
scientific name	Incoltorrida zahamena
status	sp. nov.

Treatment

Incoltorrida zahamena , new species

Figs. 11 View FIGURES 11–12 (habitus); 12 (genitalia); 36 (map); 50, 51 (habitat)

Type Material. Holotype (male): Madagascar: Toamasina: Alaotra-Mangoro: Zahamena National Park, Antanandava Sect., midaltitude rainforest: Manambato river ~ 100m downstream of Camp Cascade , hygropetric rocks at night, 17.5438S, 48.7230E, 1280m, 10.III.2018, MAD 18-111 View Materials , Leg. J. Bergsten & T. Ranarilalatiana ( NHRS) GoogleMaps . Paratypes, same data as holotype (2 females NHRS, BMNH) GoogleMaps .

Differential Diagnosis. Differentiated from other members of the genus by the combination of small size (ca. 1.97 mm), oval habitus ( Fig. 11 View FIGURES 11–12 ), pronotum without median longitudinal ridge, and elytron with eight costae. The elytral series are irregular, giving the elytra a scabrous appearance.

Description. Size: holotype (length/width, mm): body (length to elytral apices) 1.97/1.19; head width 0.39; pronotum 0.43/0.92; elytra 1.21/1.19. Dorsum dark brown to black, venter reddish brown, legs reddish brown except femoral-tibial articulations and tarsi dark brown.

Sides of frontoclypeal shield slightly arcuate. Clypeus about as long as frons.

Pronotum with short oblique carinae on anterior 1/3 moderately developed, no indication of midlongitudinal carina, area posterior to carinae transversely rounded, with no indication of ridges or depressions. Cuticle rough, subgranulate.

Elytron with eight costae of varying height; costa #6 very low and short, costa #8 generally higher and stronger than other costae; transverse ridges between costae absent or very indistinct. Serial punctures large and coarse, producing scabrous appearance.

Metaventral tabella with very faint, indistinct transverse grooves; midlongitudinal groove in posterior 1/2 of metaventral tabella widest at about midlength.

Midlongitudinal carina of first abdominal ventrite strong and extends length of ventrite.

Male genitalia in lateral view distinctively thickened in basal 1/2, apical 1/2 narrowing, with tip slightly widened and spinose ( Fig. 12 View FIGURES 11–12 ).

Etymology. Named in reference to the type locality.