Notionotus bifidus, González-Rodríguez & Short, 2022

Gonzalez-Rodriguez, Liza M. & Short, Andrew Edward Z., 2022, Revision of the water scavenger beetle genus Notionotus Spangler, 1972 in the Neotropical Region (Coleoptera, Hydrophilidae, Enochrinae), ZooKeys 1109, pp. 141-191 : 141

publication ID	https://dx.doi.org/10.3897/zookeys.1109.80775
publication LSID	lsid:zoobank.org:pub:A418DA2C-02DD-4023-A9F8-41FA0AEAAC83
persistent identifier	https://treatment.plazi.org/id/AEAADA10-0A40-4AB9-B48E-FC27A126792B
taxon LSID	lsid:zoobank.org:act:AEAADA10-0A40-4AB9-B48E-FC27A126792B
treatment provided by	ZooKeys by Pensoft
scientific name	Notionotus bifidus
status	sp. nov.

Treatment

Notionotus bifidus View in CoL sp. nov.

Figs 4J View Figure 4 , 9D View Figure 9 , 12A View Figure 12 , 14 View Figure 14

Type material.

Holotype (male): "VENEZUELA: Amazonas State/ 5°23.207'N, 67°36.922'W, 125 m/ Tobogan de la Selva; 8.viii.2008/leg. A. Short, M. García, L. Joly/ AS-08-080b; old “tobogancito” /on seepage area w/detritus" (MIZA). Paratypes (54 exs.): Venezuela: Amazonas State: Same data as holotype (18 exs., SEMC, including DNA voucher SLE1113); same data except 14.i.2009, leg. A. Short, clumps of wet leaves on rock, VZ09-0114-01D (15 exs., SEMC, including DNA voucher SLE2369); same date except 14.i.2009, leg. K. Miller, detrital rock pools, VZ09-0114-01E (1 ex., SEMC); same data except 14.i.2009, leg. Short & Miller partly shaded wet rock w/algae, VZ09-0114-01G (20 exs., MIZA, SEMC).

Differential diagnosis.

Notionotus bifidus can be separated from all other species of Notionotus lohezi group by being the only species in the group that present uniformly dorsal yellow coloration (Fig. 4J View Figure 4 ), the rectangular shape of the median lobe and its bifurcation at the apex, and the abrupt tapering of the parameres along apical third (Fig. 9D View Figure 9 ).

Description.

Size and form: Body length 1.5-1.7 mm. Body form elongate oval, moderately convex in lateral view (Fig. 4J View Figure 4 ). Color and punctation: Dorsally yellow, head mostly dark brown, frons and medial region of the clypeus dark brown, lateral sides of clypeus yellow; pronotum yellow with two small dark brown round spots along posterior margin; elytra yellow (Fig. 4J View Figure 4 ). Ventrally dark brown; maxillary palps, mouthparts, and antennae yellow. Pro legs yellow, meso and meta legs pale brown. Clypeus and labrum with dense, fine, and weakly impressed ground punctation (punctures separated by 2 × their width); pronotum and elytra ground punctation fine, weakly impressed and sparser than on head (punctures separated by 3 × their width). Head: Clypeus and labrum shallowly emarginate anteromedially, lateral margins of the labrum bearing setae. Thorax: Prosternum carinate medially, strongly raised, acute and pointing anteriorly. Elevation of mesoventrite with two transversal ridges, elevated medially, lateral sides concave; longitudinal ridge broad anteriorly and sharp posteriorly, the point where the three ridges merged wide and blunt (e.g., Fig. 10C, D View Figure 10 ); elevation flat in ventral view; mesoventrite with triangular shape in ventral view. Metaventrite convex in the median region, pubescent with broad glabrous patch on the medial and posterolateral area; anterior margin extending to mesoventrite elevation. Metafemora with dense hydrofuge pubescence along basal three-quarters of the anterior margin and along basal one-quarter of posterior margin, then apical half of posterior margin with sparse setae. Abdomen: Abdominal ventrites very densely pubescent. Aedeagus (Fig. 9D View Figure 9 ) with basal piece 0.6 × the length of a paramere. Base of the parameres narrower than the base of the median lobe; outer margins straight along basal two-thirds, then narrowing abruptly along apical third, inner margins convex along basal two-thirds and then apically slightly concave; apex of parameres rounded. Median lobe shorter than the parameres, approximately rectangular, narrow along apical fifth, apex bifurcated; gonopore drop-shaped and situated at apical fourth of median lobe.

Etymology.

The specific name comes from the Latin word bifidus meaning split into two parts, after the form of the median lobe "bifurcated apically" of the aedeagus.

Distribution.

Known only from the type locality in Venezuela (Fig. 14 View Figure 14 ).

Life history.

This species was collected in seepage habitats that were covered with algae and detritus (Fig. 12A View Figure 12 ).