Aphengium ibateguara, Silva, Fernando A. B. & Vaz-De-Mello, Fernando, 2015

Silva, Fernando A. B. & Vaz-De-Mello, Fernando, 2015, A revision of the genus Aphengium Harold, 1868 (Coleoptera: Scarabaeidae: Scarabaeinae: Ateuchini), Zootaxa 3955 (4), pp. 505-520: 510-511

publication ID

http://dx.doi.org/10.11646/zootaxa.3955.4.3

publication LSID

lsid:zoobank.org:pub:B4E21D99-203B-4818-904E-BBA145E5CD33

persistent identifier

http://treatment.plazi.org/id/03D8893B-B175-CC30-2390-FA254861FD69

treatment provided by

Plazi

scientific name

Aphengium ibateguara
status

sp. nov.

Aphengium ibateguara   sp. nov.

(Figs 2, 3, 19–24, 33, 39, 41)

Etymology. The species name is a toponym in apposition referring to the type locality.

Diagnosis. Males of A. ibateguara   sp. nov. are similar to those of A. sordidum   by having dense and contiguous dorsal punctures on head ( Fig. 21 View FIGURES 19 – 24 ). However, it can be distinguished from A. sordidum   by the following characters of the genitalia: length of parameres less than one-half that of phallobase ( Fig. 33 View FIGURES 31 – 34 ); apical third of parameres abruptly narrowed ( Fig. 33 View FIGURES 31 – 34 ); and fronto-lateral peripheral sclerite (FLP) as in figure 39. Females can be immediately distinguished from other Aphengium   species by having the same puncture patterns on the central and posterior portions of head ( Fig. 22 View FIGURES 19 – 24 ).

Description. Length. Small (7–8 mm) ( Figs. 19, 20 View FIGURES 19 – 24 ). Head. Foveiform punctures dense and contiguous over dorsal surface; deeply impressed and often rounded ( Fig. 21 View FIGURES 19 – 24 ). Surface around clypeal teeth rugose. Pronotum. Covered by foveiform, setose punctures; larger on lateral and posterior portions, not contiguous, usually separated by distance equivalent to less than one puncture diameter ( Fig. 23 View FIGURES 19 – 24 ). Anteromedial punctures weakly impressed. Disc of pronotum slightly convex. Anterior angle of pronotum approximately 90 °. Lateral angle greater than 90 °; margin explanate. Margin between lateral and posterior angles straight. Elytra. Elongate-oval shape ( Figs. 19, 20 View FIGURES 19 – 24 ). Disc slightly convex, with dense and conspicuous setae. Lateral margins slightly curved outwards. Foveiform punctures separated on the elytral disc by distance equivalent to at least two times puncture diameter. Secondary sexual characters. Besides the sexual dimorphism described for the genus, females differs from the males in the following aspects: punctures on dorsal surface of head usually smaller and more dispersed than those in males ( Fig. 22 View FIGURES 19 – 24 ). Punctures around clypeus weakly impressed. Margin of pronotum, close to lateral angles, not explanate ( Fig. 24 View FIGURES 19 – 24 ). Aedeagus. Length of parameres less than one-half that of phallobase. Apical third of parameres abruptly narrowed; apex rounded ( Fig. 33 View FIGURES 31 – 34 ). Superior right peripheral sclerite (SRP) sigmoid. Fronto-lateral peripheral sclerite (FLP) as in figure 39.

Material studied. Holotype. BRAZIL: ALAGOAS: Ibateguara   , [Usina Serra Grande], [35 ° 56 ' 15 "W, 8 ° 58 ' 41 "S], 16.III. 2008, pitfall hum. faeces, B.K.C. Filgueiras (1 ♂ CEMT). Paratypes [9]. BRAZIL: ALAGOAS: Ibateguara   , [Usina Serra Grande], [35 ° 56 ' 15 "W, 8 ° 58 ' 41 "S], 19.IX. 2007, pitfall carrion, B.K.C. Filgueiras (1 ♂ CEMT); same, 21.IX. 2007, pitfall hum. faeces, B.K.C. Filgueiras (3 ♀ CEMT); same, 12.X. 2007, pitfall hum. faeces, B.K.C. Filgueiras (1 ♀ 1 ♂ CERPE); same, 10.XI. 2007, pitfall hum. faeces, B.K.C. Filgueiras (1 ♂ CEMT); same, 16.III. 2008, pitfall carrion, B.K.C. Filgueiras (2 ♂ CEMT).

Distribution. This species is known from a single locality that corresponds to the largest remaining Atlantic Forest fragment in Alagoas state. Extensive sampling in forest fragments of neighboring areas provided no further specimens of Aphengium   .