Deltochilum (Hybomidium) guildingii ( Westwood, 1835 )

Hielkema, Auke J. & Hielkema, Meindert A., 2019, An annotated checklist of the Scarabaeoidea (Insecta: Coleoptera) of the Guianas, Insecta Mundi 732 (732), pp. 1-306 : 77-78

Deltochilum (Hybomidium) guildingii ( Westwood, 1835)

Hyboma guildingii Westwood 1835: 372 (Equatorial America - see González-Alvarado and Vaz-de-Mello (2014: 451))

= Hyboma chalcea Buquet 1844: 19 (none - LECTOTYPE) - González-Alvarado and Vaz-de-Mello 2014: 451 (syn. nov.)

Distribution. Suriname: González-Alvarado and Vaz-de-Mello 2014: 451; MHCN; RMNH. Brazil (NA): González-Alvarado and Vaz-de-Mello 2014: 451 (NA). Venezuela (EO): González-Alvarado and Vaz-de-Mello 2014: 451 (EO). Other: Westwood 1835: 372 (none - as Hyboma guildingii ); Buquet 1844: 19 (Colombia as Hyboma chalcea ); Gillet 1911b: 35 (Colombia - as D. chalceum ; not mentioned - as D. guildingii ); Blackwelder 1944: 202 (Colombia - as D. chalceum ; not mentioned - as D. guildingii ); Medina et al. 2001: 136 (Colombia - as D. orbignyi ); González-Alvarado and Vaz-de-Mello 2014: 451 (Colombia, Panama, Trinidad and Tobago - as Deltochilum (Hybomidium) guildingii ; none - designation LECTOTYPE Hyboma chalcea ).

Note 1. Paulian (1938: 262) considered Hyboma chalcea a synonym of Deltochilum orbignyi , while Vulcano and Pereira (1964: 649) considered H. guildingii a synonym of D. icarus . These synonymizations are discussed and invalidated in González-Alvarado and Vaz-de-Mello (2014: 449, 454).

Note 2. The records of Deltochilum gibbosum from Guyana and Venezuela east of the Orinoco in, respectively, Forsyth and Gill (1993: 70) and Ferrer-Paris et al. (2013: 109) are probably attributable to misidentifications. D. gibbosum is a species from North America, and the species D. densepunctatum , D. sublaeve and D. panamensis , which for some time were considered subspecies of D. gibbosum , appear to be confined to Mexico ( D. densepunctatum and D. sublaeve ) and Costa Rica, Colombia, Ecuador, Panama and Peru ( D. panamensis ). The material mentioned in Forsyth and Gill (1993) and Ferrer-Paris et al. (2013) probably belongs to D. guildingii , but as we cannot confirm this, we have not included these records here.

Note 3. According to González-Alvarado and Vaz-de-Mello (2014: 454), the record of Deltochilum orbignyi for Colombia in Medina et al. (2001: 136) concerns in fact D. guildingii . Several more authors ( Paulian 1938: 262; Vulcano and Pereira 1964: 650; Noriega et al. 2007: 82) have mentioned D. orbignyi (now D. orbignyi orbignyi ) for the Guianas and/or Colombia, but according to González-Alvarado and Vaz-de- Mello (2014: 448) this subspecies is restricted to Argentina and Bolivia. As we are unable to examine the relevant specimens to confirm our assumption that they too belong to D. guildingii , we have not included them here. See also under D. orbignyi .