Adota colpophila Gusarov

Gusarov, Vladimir I., 2003, A revision of Nearctic species of the genera Adota Casey, 1910 and Psammostiba Yosii & Sawada, 1976 (Coleoptera: Staphylinidae: Aleocharinae), Zootaxa 185, pp. 1-35 : 16-18

3. Adota colpophila Gusarov , sp. n.

( Figs. 42­51 )

Type material. Holotype:, MEXICO: Sonora: Punta Cirio, 29º53'N 112º40'W, wrack on sandy beach (V.Roth & W.Brown), 20.iii.1974 (UCR).

Paratypes: MEXICO: Sonora: 69 specimens, sama data as the holotype (UCR, KSEM, SPSU); 57 specimens, Punta Chueca, 29º00'N 112º05'W, light trap on beach (V.Roth), 18.i.1974 (UCR, KSEM, SPSU).

Diagnosis. Adota colpophila differs from Ad. maritima and Ad. gnypetoides in having glossy body, despite isodiametric microsculpture; posterior margin of male tergum 8 straight ( Fig. 42 ); median lobe with pointed apex ( Figs. 46­47 ; 23­24, 35­36) and the distinct shape of spermatheca ( Fig. 51 ).

Description. Length 2.4­2.6 mm. Body black, elytra dark brown to reddish brown, antennae black to brown, legs brown to yellowish brown.

Head surface glossy, with weak and dense isodiametric microsculpture, with fine punctation, distance between punctures equals their diameter. Frons with sparser punctation, in both sexes with weak impression. Temples as long as eyes. Antennal article 2 longer than article 3, articles 4­6 slightly elongate, article 7 as long as wide, articles 8­10 slightly transverse.

Pronotum slightly transverse, 1.1 times as wide as head, width 0.44­0.50 mm, length 0.37­0.43 mm, width to length ratio 1.1­1.3; glossy, with weak and dense isodiametric microsculpture; punctation poorly visible and finer than on head, distance between punctures equal to ½­1 times their diameter. Elytra much wider (0.61­0.66 mm) and longer (0.56­0.61 mm; measured from humeral angle) than pronotum (elytral length to pronotal length ratio 1.5), 1.1 times as wide as long, surface glossy, with weak and dense isodiametric microsculpture; punctation as on pronotum.

Abdominal terga glossy, with weak isodiametric microsculpture; with fine punctation, distance between punctures equals 1­3 times their diameter on terga 3­5 and 2­5 times on terga 6­7. Apical margin of tergum 7 with white palisade fringe.

Posterior margin of male tergum 8 with straight posterior margin ( Fig. 42 ).

Aedeagus as in Figs. 46­50 , median lobe with pointed apex ( Figs. 46­47 ).

Spermatheca as in Fig. 51 .

Distribution. Known from the Gulf of California ( Fig. 52 ).

Natural History. Adota colpophila is a littoral species, inhabiting decomposing seaweed on a beach.

Figures

FIGURE 52. Geographical distribution of Nearctic species of Adota.

FIGURES 42 ­ 45. Abdominal segment 8 of Adota colpophila Gusarov, sp. n. (male (42 ­ 43) and female (44 ­ 45) paratypes from Punta Chueca, Mexico). 42 – male tergum 8; 43 – male sternum 8; 44 – female tergum 8; 45 – female sternum 8. Scale bar 0.2 mm.

FIGURES 46 ­ 51. Genitalia of Adota colpophila Gusarov, sp. n. (male (46 ­ 50) and female (51) paratypes from Punta Chueca, Mexico). 46 – median lobe, parameral view; 47 – apex of median lobe, parameral view; 48 – median lobe, lateral view; 49 – apex of median lobe, lateral view; 50 – apex of left paramere; 51 – spermatheca. Scale bar 0.1 mm (47, 49 ­ 50), 0.2 mm (46, 48, 51).