Stethusa lurida ( Erichson, 1839 ) Erichson, 1839

Gusarov, Vladimir I., 2003, A revision of the Nearctic species of the genus Stethusa Casey, 1910 (Coleoptera: Staphylinidae: Aleocharinae), Zootaxa 239, pp. 1-43 : 29-30

Stethusa lurida ( Erichson, 1839) , new combination

( Figs. 10 , 37­38 , 46 , 53 in Klimaszewski & Peck, 1998)

Homalota lurida Erichson, 1839: 108 .

Atheta (Metaxya) lurida: Fenyes, 1920: 199 (as valid species). Atheta (s. str.) lurida: Bernhauer & Scheerpeltz, 1926: 645 (as valid species). Atheta lurida: Blackwelder, 1944: 160 (as valid species).

Atheta lurida: Pace, 1985: 454 (as valid species).

Atheta lurida: Klimaszewski & Peck, 1998: 238 (as valid species).

Material. No specimens of S. lurida have been examined.

Diagnosis. See Klimaszewski & Peck, 1998.

Discussion. Stethusa lurida is similar to the Nearctic species of the genus in the shape of posterior margin of the male tergum 8 ( Fig. 53 : Klimaszewski & Peck 1998); the pronotal pubescence of type I ( Fig. 10 : Klimaszewski & Peck 1998); the long pronotal macrosetae ( Fig. 10 : Klimaszewski & Peck 1998); the shape of the aedeagus ( Figs. 37­38 : Klimaszewski & Peck 1998), particularly the shape of the copulatory piece of the internal sac (indicated by denser punctation in both lateral and abparameral views of the median lobe ( Figs. 37­38 : Klimaszewski & Peck 1998)); and the shape of the spermatheca ( Fig. 46 : Klimaszewski & Peck 1998)). Since I have not examined any specimens of S. lurida , I rely on the published diagnosis and illustrations provided by Klimaszewski and Peck (1998) who noted that they had examined a syntype of Homalota lurida from Brasil (ZMNB).

Distribution. Stethusa lurida is known from Brasil, Argentina and the Galápagos Islands.

Figures

FIGURES 7 ­ 13. Mouthparts of Stethusa dichroa (Gravenhorst) (female, 18 km SSE Lawrence, Kansas). 7 – hypopharynx; 8 – prementum; 9 – right maxilla, ventral view; 10 – right galea, ventral view; 11 – right galea, dorsal view; 12 – right lacinia, dorsal view; 13 – mentum. Scale bar 0.1 mm (7 ­ 8, 10 ­ 13), 0.2 mm (9).

FIGURES 34 ­ 39. Aedeagus of Stethusa dichroa (Gravenhorst) (males, 12 km NNE Lawrence, Kansas (35 ­ 36, 38 ­ 39); 18 km SSE Lawrence (34, 37 )). 34 – everted internal sac, parameral view; 35 ­ 36 – details of retracted internal sac, abparameral view; 37 – everted internal sac, lateral view; 38 ­ 39 – details of retracted internal sac, lateral view. SB ­ sclerotized band. Scale bar 0.2 mm.

FIGURES 43 ­ 47. Abdominal segment 8 of Stethusa klimschi (Bernhauer) (male (43 ­ 45) and female (46 ­ 47) from Vicksburg, Mississippi). 43 – male tergum 8; 44 – male sternum 8; 45 – apex of male tergum 8; 46 – female tergum 8; 47 – female sternum 8. Scale bar 0.4 mm (43 ­ 44, 46 ­ 47), 0.2 mm (45).

FIGURES 53 ­ 57. Aedeagus and spermatheca of Stethusa klimschi (Bernhauer) (lectotype (53 ­ 54); male (55 ­ 56) and female (57) from Vicksburg, Mississippi). 53 – details of retracted internal sac, abparameral view; 54 – details of retracted internal sac, lateral view; 55 – copulatory piece, lateral view; 56 – copulatory piece, abparameral view; 57 – spermatheca. Scale bar 0.2 mm (53 ­ 54), 0.1 mm (55 ­ 57).