Madaglymbus unguicularis ( Regimbart , 1903) Regimbart, 1903

Ranarilalatiana, Tolotra, Raveloson Ravaomanarivo, Lala Harivelo & Bergsten, Johannes, 2019, Taxonomic revision of the genus Copelatus of Madagascar (Coleoptera, Dytiscidae, Copelatinae): the non- erichsonii group species, ZooKeys 869, pp. 19-90 : 19

Madaglymbus unguicularis ( Regimbart, 1903) comb. nov.

Copelatus unguicularis Régimbart, 1903:19.

Type locality.

Madagascar, Suberbieville [= Maevatanana].

Type material examined.

Mahajanga. Betsiboka: Maevatanana: -HT ♂ (GP) (MNHN, "coll. Régimbart”): // Data in NHRS | JLKB | 000030225 // Suberbieville | Madag. Perier // Type [red label] // MUSEUM PARIS | Coll. Maurice Régimbart | 1908 // C. unguicularis | Type // unguicularis Rég. //

Remarks.

Copelatus unguicularis was described by Régimbart (1903), based on a single male from Suberbieville [= Maevatanana]. It was classified by Régimbart in the fifth species group of Sharp (1882) (the consors species group sensu Guignot 1961) based on ten discal but no submarginal elytral stria where it is still classified today ( Guignot 1961; Guéorguiev 1968; Nilsson et al. 1997; Nilsson 2001; Nilsson and Hájek 2018). We have examined the male holotype and like the type of Copelatus apicalis , it has a stout spine-like setae on a protruding anterodistal corner of protarsomere IV and is not a Copelatus . In addition, the elytral striae are very irregular, more like very elongate and deep strioles and possibly not homologous to the regular impressed striae in Copelatus . We here transfer it to Madaglymbus : Madaglymbus unguicularis ( Régimbart, 1903) comb. nov.