Borneodessus zetteli kalimantanensi

Balke, M., Hendrich, L., Mazzoldi, P. & Biström, O., 2002, Borneodessus zetteli, new genus and new species, notes on biogeography and a checklist of Dytiscidae from Borneo (Insecta: Coleoptera: Dytiscidae), Journal of Natural History 36 (8), pp. 963-978 : 967-968

publication ID	https://doi.org/ 10.1080/00222930110062345
persistent identifier	https://treatment.plazi.org/id/A82B87C5-0E07-F233-4E7D-FA2EA3FBD52B
treatment provided by	Felipe
scientific name	Borneodessus zetteli kalimantanensi
status

Treatment

Borneodessus zetteli kalimantanensi s ssp. nov.

(®gures 2, 5, 8, 9)

Type material. HOLOTYPE male. Indonesia, East Kalimantan, Apokayan, Sunggai Barang, Lalut Wai , 850 m, 1 January 1998, P. Mazzoldi ( NMW) . PARATYPES: 1 male, 1 female, same label data as holotype ( CPM) .

Size. Length of beetle 3.2 mm (holotype), 3.5 mm (female); width 1.7 mm (holotype), 1.9 mm (female).

Description. This subspecies is rather similar to B. zetteli zetteli , but diOEers as follows: Borneodessus zetteli kalimantanensis (®gure 2) is distinctly larger (3.2 ±3.5 mm) than B. zetteli (2.8±2.9 mm). Median lobe of aedeagus in ventral view with tip appearing more narrowly produced (®gure 5); lateral margins slightly more parallel-sided (®gure 5) than in B. zetteli (®gure 4).

Distribution. Indonesia, East Kalimantan (Borneo), see ®gure 8.

Collecting notes. In shallow water among mats of ¯oating roots and in small isolated puddles, at the edges of streams (®gure 9). The species co-occurs with the rheobiont dytiscids Neptosternus kodadai Hendrich and Balke, 1997 and N. muluensis Hendrich and Balke, 1997 .