Grouvellinus sp. 1, Champion, 1923

Freitag, Hendrik, Molls, Christian, Bouma, Aglaia M., Garces, Jhoana M., Rossato, Marzia, Cosentino, Emanuela & Delledonne, Massimo, 2019, Additional new species of Grouvellinus Champion 1923 (Insectaı Coleopteraı Elmidae) discovered by citizen scientists and DNA barcoded in the field applying a novel MinIONbased workflow, Journal of Natural History 53 (41), pp. 2593-2620 : 2616

Grouvellinus sp. 1

( Figure 8 )

Material examined. 1♀ [H2] (SP) ‘ MALAYSIA: Sabah: Tawau River; Light trap near Park Headquarter ; ca. 4°24 ʹ 14 ʹʹ N, 117°53 ʹ 35 ʹʹ E, 270 m a.s .l.; leg. Taxon Expedition participants 12.March.2018 (1)L ’.

Remarks

This undoubtedly new species is represented by a single female specimen in our collection from the light trap at Tawau River. It appears most similar in proportion, elytral shape and size to Grouvellinus borneensis sp. nov., but differs externally by the bluish-purple metallic shine and a more rugose pronotum. It possesses the distinct rugulose elongate elytral patches between intervals 1 and 3 as also seen in females of the former species (comp. Figures 8 , 16 (b)). CL: 1.7 mm; EW: 0.8 mm. Due to the lack of male specimens and their aedeagi as the most distinctive morphological character,we refrain from a formal description. However, we provide an mtDNA barcode for comparison with any additional material to be described in the future: LR738837 .The barcode of this specimen varies at least 14.6% from all other known Grouvellinus species of Borneo.

Figures

Figure 16. Grouvellinus borneensis, sp. nov. (paratypes): (a) anteriodorsal aspect with pronotum and elytra; (b) ventral aspect with prosternum and mesoventrite; (c) posteriodorsal aspect with metaventrite and ventrites 1–5.

Figures 6–9. Habitus of the Grouvellinus species collected from the Tawan Hills Park. 6: G. luciaensis, sp. nov. (paratype male from Lucia River); 7: G. borneensis, sp. nov. (paratype male from Tawau River environment); 8: G. sp.1 (female from Tawau River environment); 9: G. sp.2 (female from Lucia River). Scale: 1 mm.