Aulonochares lingulatus, Girón & Short, 2019

Giron, Jennifer C. & Short, Andrew Edward Z., 2019, Three additional new genera of acidocerine water scavenger beetles from the Guiana and Brazilian Shield regions of South America (Coleoptera, Hydrophilidae, Acidocerinae), ZooKeys 855, pp. 109-154 : 116-117

Aulonochares lingulatus sp. nov. Figs 1 G–I , 2H, I , 3 , 4A

Type material.

Holotype (♂): "SURINAME: Sipaliwini District; 2.97731N, 55.38500W; 200 m; Camp 4 (low), Kasikasima; sandy stream on trail to METS camp; 20.iii.2012; leg. A. Short; SR12-0320-02A" (NZCS). Paratypes (12): FRENCH GUIANA: "Unnamed Trib. To Crique Nouvelle France, 3.59627N, 53.17637W, above Courant double; 09.xi.2016, leg. D. Post" (SEMC, 1, DNA voucher specimen SLE 1173). SURINAME: Sipaliwini District: Same data as holotype (NZCS, SEMC, 10, including DNA voucher SLE 415); same, except "sandy creek, trail to Kasikasima; flotation; 22.iii.2012; SR12-0322-02A" (SEMC, 1).

Differential diagnosis.

Aulonochares lingulatus can be distinguished by its orange brown general coloration (Fig. 1 G–I ), and the shape of the median lobe of aedeagus, which is broad and flat (Fig. 2I ).

Description.

Body length 6.0-6.5 mm, width 3.2-3.6 mm. General coloration

orange brown (Fig. 1 G–I ). Aedeagus (Fig. 2I ) with outer margins of parameres subparallel, slightly diverging apically; median lobe flat, gradually widening towards apical region, widely rounded at apex.

Etymology.

Named with the Latin word lingulatus meaning tongue-like, after the shape of the median lobe of the aedeagus in this species.

Distribution.

Aulonochares lingulatus is known from the area surrounding Mt. Kasikasima in Suriname and a locality in central French Guiana (Fig. 3 ).

Remarks.

All specimens were collected in densely forested sandy streams (Fig. 4A ).

Figures

Figure 1. Habitus of Aulonochares spp.: A-C Aulonochares tubulus: A dorsal view B lateral view C ventral view. D-F Aulonochares novoairensis: D dorsal view E lateral view F ventral view. G-I Aulonochares lingulatus: G dorsal view H lateral view I ventral view. Scale bars: 5 mm.

Figure 2. Head and internal structures of Aulonochares spp.: A-E Aulonochares tubulus: A head, dorsal view B ventral view of mesoventrite with simply convex posterior elevation C posterior view of metafurca D fifth abdominal ventrite E aedeagus. F, G Aulonochares novoairensis: F head, dorsal view G aedeagus. H, I Aulonochares lingulatus: H head, dorsal view I aedeagus. Scale bars: 0.5 mm.

Figure 3. Distribution of Aulonochares spp.

Figure 4. Habitat of Aulonochares spp. A habitat and type locality for A. lingulatus, Suriname: Kasikasima, collecting event SR 12 - 0320 - 02 A B habitat for A. tubulus, Guyana: Upper Berbice, collecting event GY 14 - 0921 - 03 H.