Nanosaphes tricolor, 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 : 144-146

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scientific name

Nanosaphes tricolor

sp. n.

Nanosaphes tricolor sp. n. Figs 5C, D View Figure 5 ; 16A-D View Figure 16 ; 18A View Figure 18 ; 19 View Figure 19 ; 20D-F View Figure 20

Type material examined.

Holotype (male): " SURINAME: Sipaliwini District/ 2.97731°N, 55.38500°W, 200 m/ Camp 4 (low), Kasikasima; sandy/ creek, trail to Kasikasima; leg. A. Short/ 22.iii.2012; SR12-0322-02A/ flotation; 2012 CI-RAP Survey" (NZCS). Paratypes (136): GUYANA: Region XII: " 5°17.823'N, 59°50.000'W, 684 m/ Ayanganna Airstrip, trail from/ Blackwater Creek Camp to Potaro/ River; sand/gravel washing in/ gravel bar; leg. A. Short / 18.iii.2014; GY14-0318-03C" (1, SEMC; DNA voucher SLE1067). 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" (47, SEMC, including DNA voucher SLE130); same, except "small stream/ 5.ix.2010; SR10-0905-01A" (1, SEMC); same, except " 2°19.280'N, 56°52.595'W, 224 m/ Rapids on Kutari River/ leg. A.E.Z. Short; forest stream/ 18.viii.2010; SR10-0818-01A" (1, SEMC); same, except " 2.97731°N, 55.38500°W, 200 m/ Camp 4 (low), Kasi kasima; sandy/ stream on trail to METS camp/ 20.iii.2012; SR12-0320-02A" (4, SEMC); same data as holotype (9, SEMC); same, except " 04°42.480'N 56°13.159'W, 24 m/ Raleighfallen Nature Reserve, trail/ to Raleighfallen; creek margins/ leg. Short, McIntosh, & Kadosoe/ 27.vii.2012; SR12-0727-03A" (3, SEMC); same, except " 04°40.910'N, 56°11.138'W, 78 m/ Raleighfallen Nature Reserve / Voltzberg Station; sand bar in/ stream; leg. C. McIntosh / 29.vii.2012; SR12-0729-02C" (8, SEMC); same, except "Votlzberg trail; margin of stream; leg. C. Maier, V. Kadosoe; 30.vii.2012; SR12-0730-01A" (1, SEMC); " 2°00.342'N, 55°58.149'W, 337 m/ Sipaliwini Savanna Nature Res./ 4-Brothers Mts.; clearwater stream/ sandy w/detritus; 31.iii.2017/ leg. Short & Baca; SR17-0331-01B" (32, SEMC); same, except "sandy w/ emergent veg; SR17-0331-01C" (19, SEMC); same, except "at night; leg. Short; SR17-0331-01F" (10, SEMC).

Differential diagnosis.

Nanosaphes tricolor 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 uniformly dark brown head (including the clypeus, see Fig. 16D View Figure 16 ), yellow pronotum and brown elytra (see Fig. 16A, B View Figure 16 ; as opposed to uniform brown coloration along the body as in N. castaneus , Fig. 15E, H View Figure 15 ). It is similar to N. hesperus in the paler coloration of the pronotum, but differs from it by the uniform and darker coloration of the head (orange in N. hesperus ) and the weak development of the longitudinal elevation of the mesoventrite (as opposed to strongly elevated as to form a sharp and pointed carina in N. hesperus ).


Body length 1.1-1.4 mm, width 0.7-0.75 mm. Body elongate oval, weakly convex, with uniformly dark brown head (including clypeus, Fig. 16D View Figure 16 ), yellow pronotum and brown elytra (Fig. 16A, B View Figure 16 ). Dorsal surface shallowly punctate. Posterior elevation of mesoventrite weakly carinate. Pubescence of ventral surface very dense. Aedeagus (Fig. 18A View Figure 18 ) with basal piece nearly 0.6-times the length of parameres; parameres slightly shorter than median lobe, with obliquely round apex; gonopore situated near apical third of median lobe.


Noun in apposition. Named after the three colors present along the body of the beetles (uniformly dark head, yellow pronotum and brown elytra), with the Latin prefix tri meaning three and the Latin word color.


Guyana, Suriname. Elevation range 24-684 m. See Fig. 19 View Figure 19 .


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