Bagous trapae

ROBERTO CALDARA, CHARLES W. O’BRIEN & MASSIMO MEREGALLI, 2017, A phylogenetic analysis of the aquatic weevil tribe Bagoini (Coleoptera: Curculionidae) based on morphological characters of adults, Zootaxa 4287 (1), pp. 1-63 : 49

30. Bagous trapae group

Diagnosis. Tibiae with long fine swimming hairs, many much longer than diameter of tibia (char. 47.1). Tibiae broad, with outer and inner margin more or less perpendicular to apex, the apex not slightly narrowed (char. 49.1). Tarsi elongate and linear, tarsomere 3 subglabrous beneath, with few long setae (char. 53.2). Orificial lateral sclerites with basal margin distinct, raised and basally recurved upwards (char. 75.2), distinctly laterally movable (char. 78.1). Median setal brush behind orifice situated on ventral surface of dorsal process (char. 92.3). Dorsal surface of penis body, behind dorsal process with broad depression (char. 99.1). Post-orificial dorsal process of penis body almost horizontal, directed distally (char. 98.1). Arms of spiculum ventrale apically broadly fused, leaving small to large membranous central fenestra. Insertion of spermathecal gland attached on body, anteapically (char. 115.1).

Remarks. This group is well-distinguished by a series of synapomorphies of the legs and especially of the penis, which bears an extremely curious dorsal process that is rich in apomorphies. In B. colossus the elytral strial punctures are large, one-third to more than one-half intervals width, similar to other unrelated species.

Species included. AFR: ¹ Bagous punctipennis Marshall, 1906 , ¹ B. remaudierei Hoffmann, 1954 ; AUS: ¹ B. natator O'Brien, 1992 ; ORR: *² B. colossus O'Brien, 1995 , *¹ B. trapae Parshad, 1961 .