Callistethus marginatus ( Fabricius, 1792 )

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 : 120-121

§ Callistethus marginatus ( Fabricius, 1792)

Melolontha marginata Fabricius 1792: 164 (none)

= Melolontha annulata Germar 1824: 121 ( U.S.A.)

Distribution. Brazil: Blackwelder 1944: 244 (as Anomala marginata ). Venezuela: Ohaus 1897: 419 (as Anomala marginata ). “Amazon Basin”: Ohaus 1897: 419 (as Anomala marginata ); Machatschke 1972: 174. Other: Fabricius 1792: 164 (none - as Melolontha marginata ); Germar 1824: 121 (U.S.A. - as Melolontha annulata ); Ohaus 1897: 419 (“Amazon Basin”–North America - as Anomala marginata ); Blackwelder 1944: 244 (Central and South America - as Anomala marginata ); Machatschke 1972: 174 (“Amazon Basin”–North America).

Note 1. Callistethus marginatus is described as Melolontha marginata in Fabricius (1792: 164) , while Strigoderma marginata is described as Melolontha marginata in Olivier (1789: 70) . We are unaware whether this homonymy has already been resolved. If it is still unresolved, it seems logical to keep the older S. marginata ( Olivier, 1789) as a valid name and use as a replacement name for its junior homonym the name M. annulata Germar, 1824 (p. 121), which is found to be a synonym of M. marginata Fabricius, 1792 in Burmeister (1844: 266) . We have refrained from doing so because we have not verified the validity of the synonymy of M. marginata Fabricus, 1792 with M. annulata Germar, 1824 , while we are also unsure if older synonymies or homonymies of these names exist.

Note 2. Although we have found no records or specimens of Callistethus marginatus for the research area, we have elected to include this species in this checklist because of its proximity to the research area and to draw some attention to the nomenclatural issue mentioned above. See also at Strigoderma marginata .