Revision of the water scavenger beetle genus Notionotus Spangler, 1972 in the Neotropical Region (Coleoptera, Hydrophilidae, Enochrinae)
Gonzalez-Rodriguez, Liza M.
Short, Andrew Edward Z.
ZooKeys
2022
2022-07-01
1109
141
191
9GDFX
http://zoobank.org/7954CB9D-66E9-492F-865E-90BA4991ADF3
González-Rodríguez & Short, 2022
González-Rodríguez & Short
2022
Insecta
Hydrophilidae
Notionotus
CoL
Animalia
Notionotus bicolor
Coleoptera
0
141
Arthropoda
species
bicolor
sp. nov.
Figs 4A , 8A , 10D , 12D , 15
Type material examined. Holotype(male): "SURINAME: Sipaliwini District/ 4.42313°N, 57.19198°W, 104 m/ Kabalebo Nature Resort/ Moi Moi Creek; 10-14.iii.2019/ leg Short & Baca small seeps/ SR19-0310-01F" (NZCS). Paratypes(88 exs.): Suriname: Sipaliwini District: Same data as holotype (8 exs., SEMC); Kabalebo Nature Resort: Charlie Falls, 4.38302°N, 57.21161°W, 174 m, 11.iii.2019, leg. Short, Baca and class, rocks pools in creekbed, SR19-0311-01A (55 exs., NZCS, SEMC, including DNA vouchers SLE1810 and SLE2120); same data except leg. Short, Seepage, SR19-0311-01B (14 exs., SEMC); same data except leg. Baca, side pools in gravel in creekbed, SR19-0311-01E (2 exs., SEMC); Kabalebo Nature Resort Moi Moi creek, 4.42313°N, 57.19198°W, 104 m, 10-14.iii.2019 leg. Short, Baca and class, margin of seepage, SR19-0310-01E (2 exs., SEMC); same data except leg. Baca, margin of stream pool with root mats, SR19-0310-01L (1 ex., SEMC); same data except leg. Short and class, small trickle on rocks w/detritus, SR19-0310-01M (4 exs., SEMC); CSNR: Tafelberg Summit, near Caiman Creek Camp, 3°53.942'N, 56°.10.849'W, 733 m, 19.viii.2013, leg. Short and Bloom, margins and leaf packs in Caiman Creek, SR13-0819-05D (2 exs., SEMC).
Differential diagnosis. Notionotus bicolorshares the bicolorous dorsal coloration that can also be observed in N. garciae, N. patamona, and N. lohezi. It can be recognized by the shape of the aedeagus, the median lobe is much shorter than in N. insignitus(Fig. 8B) and N. patamona(Fig. 8D), and slightly longer than in N. lohezi(Fig. 8F). The margins of the median lobe are sinuate with a widening in the middle length, this differs in the other species where the margins are slightly straight. Moreover, the apex is slightly narrow and rounded, this differs in N. insignituswith acute apex, N. patamonawith rounded and wide apex and N. loheziwith blunt apex. Figure 8.Aedeagi of Notionotus lohezispecies group A N. bicolor(holotype) B N. insignitus(holotype) C N. brunbadius(holotype) D N. patamona(holotype) E N. retusus(holotype) F N. lohezi(paratype) G N. juma(holotype) H N. garciae(holotype).
Description. Size and form: Body length 1.7-2 mm. Body form elongate oval, moderately convex in lateral view (Fig. 4A). Color and punctation: Dorsally bicolor, head brown, frons dark brown; pronotum yellow with two small black round spots along posterior margin; elytra dark brown, elytra margins paler (Fig. 4A). Ventrally brown; maxillary palps, mouthparts, and antennae yellow (antennal club slightly darker), pro legs yellow, meso and meta legs pale brown. Clypeus and labrum with dense, fine, and weakly impressed ground punctation (punctures separated by 2 xtheir width); pronotum and elytra ground punctation fine, weakly impressed and sparser than on head (punctures separated by 3-4 xtheir 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 (Fig. 10D); elevation flat in ventral view; mesoventrite with triangular shape in ventral view. Metaventrite convex in the median region, pubescent with narrow 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 sparse pubescence along the entire basal posterior margin. Abdomen: Abdominal ventrites very densely pubescent. Aedeagus (Fig. 8A) with basal piece 0.7 xthe length of a paramere. Base of the parameres slightly narrower than the base of the median lobe; outer margin convex, inner margins along basal two-thirds slightly convex, apical third straight; apex of parameres slightly acute, pointing inwards. Median lobe shorter than the parameres, wide at basal region, narrowing in the midlength, then sinuate, apex slightly acute; gonopore situated at the apex of median lobe.
Etymology. The name derived from the Latin words bimeaning two and colormeaning hue, referring to the dorsal coloration of the species. This species has yellow coloration in the pronotum and black in the elytra.
Distribution. Known from two localities in central Suriname: Kabalebo and the summit of Tafelberg Tepui (Fig. 15).
Life history. At Kabalebo, this species was collected in several streams, including both along the margin, rock pools with detritus in the creek bed, and in seepage habitats (Fig. 12D). At Tafelberg, the species was collected along a rocky creek margin with detritus.