Canthidium (Neocanthidium) ayri, Carvalho De Santana & Pacheco & Vaz-De, 2019

Carvalho De Santana, Edrielly C., Pacheco, Thaynara L. & Vaz-De, Fernando Z., 2019, Taxonomic revision of the Canthidium Erichson, 1847 species of the gigas group (Coleoptera, Scarabaeidae, Scarabaeinae), European Journal of Taxonomy 530, pp. 1-24 : 7-8

Canthidium (Neocanthidium) ayri sp. nov.

urn:lsid:zoobank.org:act:0209148B-40FB-43DE-8566-3EEB43646298

Figs 4 , 8

Diagnosis

Canthidium ayri sp. nov. is differentiated from the other species in the group by the unarmed head and pronotum, lacking projections.

Etymology

Named for Ayr de Moura Bello, great collector and enthusiast of Brazilian beetles, directly or indirectly responsible for the present increase of studies on Brazilian Coleoptera .

Type material

Holotype

BRAZIL • ♂; “Cerqueira César/ SP-Brasil/ II-1995 / COL. J. Carlos ”; CEMT, ex AMBC.

Paratypes

BRAZIL – São Paulo • 1 ♀; Anhembi; EECFA, Esalq /USP; light trap, Eucalyptus urophylla ; 22°40 ′ S, 48°10 ′ W; E.N.L. Ferreira leg.; CEMT . – Paraná • 1 ♀; Icaraima, Estância Felipe ; same collection data as for preceding; 23 Dec. 2018 – 5 Jan. 2019; D.F. Rodrigues leg.; CEMT . – Minas Gerais • 1 ♂; Monjolinho ; 19°33 ′ 10 ″ S, 49°15 ′ 25 ″ E; Nov. 1989; CEMT • 3 ♂♂; 6 ♀♀; same locality as for preceding; Dec. 1988; CEMT • 1 ♂; 1 ♀; same locality as for preceding; Dec. 1988; BMNH • 1 ♀; Três Marias ; 18°12 ′ 23 ″ S, 45°13 ′ 53 ″ E; Nov. 1989; CEMT • 1 ♀; same locality as for preceding; Nov. 1991; J.C. Zanúncio leg.; CEMT .

Description (holotype)

MEASUREMENTS. Length: 8 mm.

HEAD. Surface with microsculpture obscurely variolate. Without frontoclypeal carina.

PRONOTUM. Regularly convex, strongly and completely punctate, without projections along anterior margin.

HYPOMERON. Hypomeral carina complete.

METAVENTRITE. With simple and shallow punctation, laterobasal region with stronger punctation, lateral region with microsculpture obscurely variolate, almost semicircular.

MESEPIMERON AND MESEPISTERNUM. With shallow punctation, stronger microsculpture obscurely variolate, almost semicircular.

HIND LEG. Metafemora with a carina along posterior edge, anterior edge with setal fringe, surface with fine punctation. Metatibiae elongated and gradually dilated towards the apex; external margin serrated.

AEDEAGUS. In dorsal view, parameres with median angulation nearly absent and with a shallow apical cavity; in lateral view, with dorsal angulation at the basal one-third.

Variation and sexual dimorphism

Length ranging from 8.00 to 8.31 mm. Males with ventrite VI wider medially, female ventrite VI with the same length throughout. Males also have protibial spur flattened, while in females the protibial spur is narrowed and pointed.

Geographical distribution

The specimens examined were collected in the Brazilian state of São Paulo in the Paraná and Chacoan dominion.

Figures

Fig. 4. Canthidium ayri sp. nov., holotype (CEMT) A. Dorsal view. B. Lateral view of aedeagus. C. Dorsal view of aedeagus. Scale bars: 1 mm.

Fig. 8. Geographical distribution of Canthidium kelleri (Martínez et al., 1964) (circles) and Canthidium ayri sp. nov. (triangles).