Amblycerus marinonii Ribeiro-Costa, 1993

Ribeiro-Costa, Cibele Stramare & Morse, Geoffrey E., 2025, Circumscription of the sclerolobii group of Amblycerus Thunberg (Coleoptera, Chrysomelidae, Bruchinae) with descriptions of four new species and a revision of the species groups of the genus, ZooKeys 1252, pp. 35-67 : 35-67

Amblycerus marinonii Ribeiro-Costa, 1993

Fig. 8 A – G , Table 1

Amblycerus marinonii Ribeiro-Costa, 1993: 8–9 (detailed original description, type locality: Goiás); Ribeiro-Costa 2000: 330 (mentioned); Ribeiro-Costa et al. 2018: 551 (catalog); Santos and Ribeiro-Costa 2019: 103 (taxonomy); Romero-Nápoles et al. 2021: 208 (catalog).

Type material.

Holotype • Deposited in DZUP, male, with labels: Brazil: Goiás, Dianópolis ; 16-22. I. 1962; J. Bechyné leg. ( Ribeiro-Costa 1993).

Additional material examined.

• ( n = 5) Cuiabá-MT / X / 1998 \ Souza, M. J. M. \ pl. hosp. \ Sclerolobium \ paniculatum \ var. rubiginosum [white label with black margin, printed in black]; Amblycerus \ marinonii \ Ribeiro-Costa, C. S. det. 2024 [white label with black margin, handwritten except name of identifier and date printed in black] ( USNM). New record. • ( n = 2) Brazil – Go Barro Alto \ 15 ° 04 ' 23.30 " S, 48 ° 59 ' 51.60 " W \ XI 2009 M. Pimenta & L. L. \ Bergamini cols Malaise [white label with black margin, handwritten except name of identifier and date printed in black]; Chrysomelidae \ Bruchinae sp. 4 p 831 \ L. L. Bergamini det. 2010 [white label with black margin, printed in black]; Amblycerus \ marinonii \ Ribeiro-Costa, C. S. det. 2024 [white label with black margin, handwritten except name of identifier and date printed in black] ( DZUP).

Diagnosis.

Amblycerus marinonii can be distinguished mainly by the presence in the internal sac of male genitalia at AR of one pair of tooth-shaped, large and strongly curved sclerite (Fig. 8 F ). Although A. marinonii shares one pair of sclerite with A. sclerolobii (Fig. 6 H ), A. tachigaliae (Fig. 10 G ), A. marinonii (Fig. 8 F ) and A. kingsolveri (Fig. 7 G ) it can be separated by the conspicuous form of the AR sclerites.

Distribution.

Brazil (Mato Grosso-Cuiabá, Goiás-Dianópolis, Barro Alto *).

Host plants.

Fabaceae : Tachigali rubiginosa (Mart. ex Tul.) Oliveira-Filho (quoted as Sclerolobium paniculatum var. rubiginosum ).

Figures

Figure 6. Amblycerus sclerolobii Ribeiro-Costa, 2000 A dorsal view B scutellum C lateral view D lateral view variation E head frontal view F male pygidium G female pygidium H median lobe of male genitalia I tegmen of male genitalia. Scale bars: 1.0 mm (A, C – G); 0.5 mm (B, H, I).

Figure 7. Amblycerus kingsolveri Ribeiro-Costa, 1993 A dorsal view B dorsal view variation C scutellum D head frontal view E male pygidium F lateral view G median lobe of male genitalia H tegmen of male genitalia. Scale bars: 1.0 mm (A, B – F); 0.5 mm (C, G, H).

Figure 8. Amblycerus marinonii Ribeiro-Costa, 1993 A dorsal view B scutellum C lateral view D head frontal view E male pygidium F median lobe of male genitalia G tegmen of male genitalia. Scale bars: 1.0 mm (A, C, D); 0.5 mm (B, E, F, G).

Figure 10. Amblycerus tachigaliae Kingsolver, 1976 A dorsal view B scutellum C lateral view D lateral view variation E head frontal view F male pygidium G median lobe of male genitalia H tegmen of male genitalia. Scale bars: 1.0 mm (A, C – F); 0.5 mm (B, G, H).