Nanosaphes hesperus, Girón & Short, 2018

Giron, Jennifer C. & Short, Andrew Edward Z., 2018, Three new genera of acidocerine water scavenger beetles from tropical South America (Coleoptera, Hydrophilidae, Acidocerinae), ZooKeys 768, pp. 113-158 : 141-143

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scientific name

Nanosaphes hesperus

sp. n.

Nanosaphes hesperus sp. n. Figs 16E-H View Figure 16 ; 17A-C View Figure 17 ; 18B View Figure 18 ; 19 View Figure 19 ; 20A, C, D View Figure 20

Type material examined.

Holotype (male): " SURINAME: Sipaliwini District/ 2°10.521'N, 56°47.244'W, 228 m/ Camp 1, on Kutari River; leg. Short/ & Kadosoe; forest stream/ 20.viii.2010; SR10-0820-01A/ 2010 CI-RAP Survey" (NZCS). Paratypes (38): GUYANA: Region IX: " 2°06.492'N, 59°13.653'W, 274 m/ Parabara, N. side of river/ small flowing forested creek/ detritus margins & leaf packs/ leg. Short, Isaacs, Salisbury/ 3.xi.2013; GY13-1103-02A" (1, SEMC); Region VI: " 4°09.143'N, 58°11.207'W, 105 m/ Upper Berbice, c. 1 km W/ Basecamp 1; washing sand/ banks; leg. A. Short; 22.iv.2014/ GY14-0921-03E" (1, SEMC); "margins of creek/ leg. Short, Salisbury, La Cruz/ 22.iv.2014/ GY14-0921-03H" (1, SEMC). SURINAME: Sipaliwini District: " 2°21.776'N, 56°41.861'W, 237 m/ Camp 3, Wehepai; leg. Short &/ Kadosoe; sandy forest creek/ 4-6.ix.2010; SR10-0904-01A/ 2010 CI-RAP Survey" (19, SEMC); same, except "small stream/ 5.ix.2010; SR10-0905-01A" (1, SEMC); same, except " 2°10.521'N, 56°47.244'W, 228 m/ Camp 1, on Kutari River/ Short & Kadosoe; forest stream/ 19.viii.2010; SR10-0819-02A" (1, SEMC); same, except "20.viii.2010; SR10-0820-01A" (8, SEMC); same, except " 2.97731°N, 55.38500°W, 200 m/ Camp 4 (low), Kasikasima; sandy/ stream on trail to METS camp/ 20.iii.2012; SR12-0320-02A/ leg. A. Short; 2012 CI-RAP Survey" (3, SEMC, including DNA voucher SLE485); " 04°40.966'N, 56°11.262'W, 96 m/ Raleighfallen Nature Reserve/ plateau below Voltzberg; rock pool/ leg. A. Short, Maier & McIntosh/ 28.vii.2012; SR12-0728-01F" (1, SEMC); " 04°40.910'N, 56°11.138'W, 78 m/ Raleighfallen Nature Reserve/ Voltzberg trail; margin of stream/ leg. C. Maier & V. Kadosoe/ 30.vii.2012; SR12-0730-01A" (1, SEMC); Raleighfallen Nature Reserve, 17.iii.2016, leg. Girón, SR16-0317-04A (1, SEMC, DNA voucher SLE1070).

Differential diagnosis.

Nanosaphes hesperus (Fig. 16E-H View Figure 16 ) can be easily recognized by its smooth elytra (as opposed to rather coarsely punctate as in N. punctatus , see Fig. 15E, F View Figure 15 ), and the coloration pattern along the body, with brown elytra, yellow pronotum and brown head with orange clypeus (as opposed to uniform brown coloration along the body as in N. castaneus , or uniformly dark brown head (including the clypeus) as in N. tricolor , see Fig. 16D View Figure 16 ). Furthermore, it differs from the remaining known species by the sharp, strongly elevated, and pointed carina on the mesoventrite (as opposed to weakly elevated).


Body length 1.3-1.5 mm, width 0.7-0.9 mm. Body elongate oval, weakly convex, with brown head, orange clypeus, yellow pronotum and brown elytra (Fig. 16E-H View Figure 16 ). Dorsal surface shallowly punctate. Posterior elevation of mesoventrite sharply carinate. Pubescence of ventral surface scanty. Aedeagus (Fig. 18B View Figure 18 ) with basal piece 0.35-times the length of parameres; parameres as long as median lobe, with narrowly round apex; gonopore situated near apex of median lobe.


Named in reference to the gradation of orange to brown colorations along the body of the beetles, which resembles the colors of the sunset, with the Latin word hesperus meaning evening.


Guyana, Suriname. Elevation range 105-228 m. See Fig. 19 View Figure 19 .


This species has been collected along the margins of forested streams (see Fig. 20A, C, D View Figure 20 .