Novochares bisinuatus, Short & Girón, 2023

Short, Andrew Edward Z. & Giron, Jennifer C., 2023, Revision of the Neotropical water scavenger beetle genus Novochares Giron & Short (Coleoptera, Hydrophilidae, Acidocerinae), ZooKeys 1171, pp. 1-112 : 1

Novochares bisinuatus sp. nov.

Figs 18A, B , 22B

Type material.

Holotype (male): "BRASIL: Goiás, Sta./ Isabel, R. Araguaia,/ Isla do Bananal/ I,8-11,1961./ B. Malkin leg." (FMNH). Paratype (1 ex.): Brazil: Goiás: Same data as holotype (1, SEMC).

Differential diagnosis.

The aedeagal form of this species is most similar to N. yanomami , but that species has a deeply forked dorsal plate of the median lobe that extends to the apex of the parameres (Fig. 18C ); it is not forked and it is much shorter in N. bisinuatus (Fig. 18A ).

Description.

Body length 5.5-6.3 mm. Coloration: Dorsal surfaces brown to dark brown, with slightly to strongly paler (orange) margins of clypeus, head, pronotum, and elytra. Head: Maxillary palps nearly 1.2 × width of head, uniformly orange in color. Thorax: Ground punctation on pronotum and elytra relatively dense and moderately impressed. Each elytron with eight or nine well-defined rows of serial punctures on dorsal surface, with very faint rows (one dorsal and two or three lateral) of scarce and weakly marked systematic punctures; elytral ground punctation moderately impressed. Prosternum flat. Posterior elevation of mesoventrite transverse, curved, and posteriorly concave. Abdomen: Apical emargination of fifth ventrite relatively broad and deep, U-shaped. Aedeagus: (Fig. 18A, B ) Overall shape pear-like, nearly 2 × longer than wide; lateral projection on apical region of outer margin of each paramere pointed; at closest point, dorsal inner margins of parameres separated by distance 0.2 × greatest width of a paramere; dorsal plate of median lobe with neck 0.2 × as broad as base; apex of dorsal plate of median lobe medially emarginate, not forming distinct arms; gonopore placed at base of dorsal plate of median lobe; ventral plate of median lobe moderately sclerotized, triangular, apically acute, apex nearly extending to apex of dorsal plate; basal piece 0.37 × length of a paramere. In lateral view, aedeagus nearly straight at base, somewhat teardrop-shaped, with ventral outline of parameres 3 × longer than greatest width near basal 1/3; dorsal outline nearly straight along basal 1/2.

Etymology.

Referring to the bisinuate apex of the dorsal plate of the median lobe.

Distribution.

Known only from the type locality in central Brazil (Fig. 22B ).

Habitat.

Nothing is known about the habitat of this species.

Figures

Figure 18. Aedeagi of the Novochares sallaei species group A, B N. bisinuatus C-E N. yanomami F-I N. fernandezae J, K N. unguis L N. clavieri M-P N. cochlearis A, C, F, J, L, M, O, P dorsal view B, H, N lateral view D, G ventral view E, I, K oblique view M, N Brazil O Venezuela P Suriname.

Figure 22. Distribution of Novochares sallaei species group A N. cochlearis (red: circles, examined specimens; squares, literature / unconfirmed records), N. dicranospathus (yellow), N. pastinum (blue) B N. atratus (red: circles, examined specimens; squares, literature / unconfirmed records), N. clavieri (yellow), N. bisinuatus (blue), N. garciai (green) C N. chaquensis (red: circles, examined specimens; squares, literature / unconfirmed records), N. pichilingue (yellow) D N. fernandezae (red), N. tridentis (yellow), N. quadrispinus (blue), N. unguis (green).