Helicops hagmanni Roux, 1910

Schoeneberg, Yannis & Koehler, Gunther, 2022, Distribution and identification of the species in the genus Helicops Wagler, 1830 (Serpentes, Colubridae, Xenodontinae), Biodiversity Data Journal 10, pp. 69234-69234 : 69234

Helicops hagmanni Roux, 1910

Materials

Type status: Other material. Occurrence: catalogNumber: MTKD 7801 ; recordedBy: Poeppig leg.; individualCount: 1; sex: male; Taxon: scientificName: Helicops hagmanni Roux , 1910; Location : country: Brazil; stateProvince: Amazonas; Event : year: 1831; Record Level : institutionID: MTKD Type status: Other material. Occurrence: catalogNumber: ZMB C-826 ; recordedBy: A. Freiherr v. Dungern leg.; individualCount: 1; sex: female; Taxon: scientificName: Helicops hagmanni Roux , 1910; Location : country: Brazil; stateProvince: Para; locality: Umgebung von Para ; Record Level : institutionID: ZMB

Diagnosis

Helicops hagmanni is distinguished from all its congeners by having subcaudal keels, 21-29 dorsal scale rows at mid-body (versus 17-20 in H. angulatus ; 21-22 in H. apiaka ; 19 in H. gomesi ; 23-25 in H. pastazae ) and 50-59 subcaudals (compared to 79-103 in H. apiaka ; 72-117 in H. pastazae ); (for information on references, see Suppl. material 3).

Distribution

The distribution of H. hagmanni ranges from the Estuary of the Amazonas to the Brazilian Provinces Amazonas, Acre, Rondônia and the Venezuelan Province Amazonas. There is also one record from south-western Colombia ( Rossman 1975, Fig. 2 a).

Morphology remark

The examined specimens had smooth subcaudal scales on the anterior part of the tail, changing to weakly-keeled scales at the posterior tail, which contrasts with the examination results in Moraes-da-Silva et al. (2019) who reported them to be absent, without further notes on methodology for this character (see also Tables 1 , 2 ).