Adota maritima Mannerheim 1843

Field: Agricultural and Biological Sciences (Life Sciences)

1. Adota maritima (Mannerheim, 1843) (Figs. 1­16, 18­30) Homalota maritima Mannerheim, 1843: 224. Atheta (Adota) massettensis Casey, 1910: 68. Atheta (Adota) subintima Casey, 1910: 68, syn. nov. Atheta (Panalota) setositarsis Casey, 1910: 71, syn. nov. Atheta (Adota) scortea Casey, 1911: 124, syn. nov. Atheta (Adota) scolopacina Casey, 1911: 124, syn. nov. Atheta (Adota) insons Casey, 1911: 125, syn. nov. Adota massettensis: Fenyes, 1920: 176 (misspelled as masettensis; as valid species). Adota subintima: Fenyes, 1920: 176 (as valid species). Adota scortea: Fenyes, 1920: 176 (as valid species). Adota scolopacina: Fenyes, 1920: 176 (as valid species). Adota insons: Fenyes, 1920: 176 (as valid species). Atheta (Metaxya) maritima: Fenyes, 1920: 199. Panalota setositarsis: Fenyes, 1920: 243 (as valid species). Atheta (Panalota) maritima: Bernhauer & Scheerpeltz, 1926: 611 (as valid species). Atheta (Panalota) setositarsis: Bernhauer & Scheerpeltz, 1926: 611 (as possible synonym of At. maritima). Atheta (Adota) insons: Bernhauer & Scheerpeltz, 1926: 659 (as valid species). Atheta (Adota) massettensis: Bernhauer & Scheerpeltz, 1926: 659 (misspelled as masettensis; as valid species). Atheta (Adota) scolopacina: Bernhauer & Scheerpeltz, 1926: 659 (as valid species). Atheta (Adota) scortea: Bernhauer & Scheerpeltz, 1926: 659 (as valid species). Atheta (Adota) subintima: Bernhauer & Scheerpeltz, 1926: 659 (as valid species). Atheta (Panalota) maritima: Brundin, 1943: 24. Atheta (Brundinia) maritima: Moore & Legner, 1975: 366 (as valid species). Atheta (Adota) massettensis: Moore & Legner, 1975: 366 (as valid species). Atheta (Adota) subintima: Moore & Legner, 1975: 366 (as synonym of Atheta massettensis). Atheta (Adota) insons: Moore & Legner, 1975: 364 (as valid species). Atheta (Panalota) setositarsis: Moore & Legner, 1975: 366 (as valid species). Atheta (Adota) scolopacina: Moore & Legner, 1975: 373 (as valid species). Atheta (Adota) scortea: Moore & Legner, 1975: 373 (as valid species). Panalota maritima: Seevers, 1978: 265 (as valid species). Panalota setositarsis: Seevers, 1978: 265 (as valid species). Xenota massettensis: Seevers, 1978: 270 (as valid species). Xenota subintima: Seevers, 1978: 271 (as valid species). Xenota scortea: Seevers, 1978: 271 (as valid species). Xenota scolopacina: Seevers, 1978: 271 (as valid species). Xenota insons: Seevers, 1978: 270 (as valid species). Adota maritima: Lohse & Smetana, 1985: 282 (as valid species). Adota massettensis: Lohse & Smetana, 1985: 282 (misspelled as massetensis; as synonym of Adota maritima). Adota setositarsis: Lohse & Smetana, 1985: 282 (as valid species). Type material. Lectotype of Homalota maritima (designated by Lohse and Smetana (1985)),, UNITED STATES: Alaska: Sitka (MZHF). Lectotype of Atheta massettensis (here designated):, "Q.[ueen] C.[harlotte] I.[slands] [Massett (J.H.Keen)]", " Adota massettensis Csy. ", " TYPE USNM 39364" (red label), " CASEY bequest 1925" (NMNH). Paralectotypes: 4, "Q.[ueen] C.[harlotte] I.[slands] [Massett (J.H.Keen)]", " massettensis PARATYPE USNM 39364" (red label), " CASEY bequest 1925" (NMNH). Lectotype of Atheta subintima (here designated):, "Metlakatla, B.[ritish] Col.[umbia] (Keen)", " subintima Csy. ", " TYPE USNM 39365" (red label), " CASEY bequest 1925" (NMNH). Paralectotypes: 14 specimens, "Metlakatla, B.[ritish] Col.[umbia] (Keen)", " subintima PARATYPE USNM 39365" (red label), " CASEY bequest 1925" (NMNH). Holotype of Atheta setositarsis:, "Cal.[ifornia, San Francisco]", " Panalota setositarsis Csy. ", " TYPE USNM 39358" (red label), " CASEY bequest 1925" (NMNH). Lectotype of Atheta scortea (here designated):, "Cal.[ifornia, Berkeley, Alameda Co.]", " scortea Csy. ", " TYPE USNM 39367" (red label), " CASEY bequest 1925" (NMNH). Lectotype of Atheta scolopacina (here designated):, "Cal.[ifornia, Berkeley, Alameda Co.]", " scolopacina Csy. ", " TYPE USNM 39369" (red label), " CASEY bequest 1925" (NMNH). Lectotype of Atheta insons (here designated):, "Cal.[ifornia, San Diego]", " insons Csy. ", " TYPE USNM 39370" (red label), " CASEY bequest 1925" (NMNH). Additional material. UNITED STATES: Alaska:, Kodiak (MZHF); Kenai Peninsula Co.: 8 specimens, Homer, S shore of Homer spit, 59º36.33'N 151º25.71'W, sandy seashore, in seaweed (V.I.Gusarov), 22.vii.1998 (AMNH, SPSU); Haines Co.:, Haines, sifting algae on beach (Campbell & Smetana), 3.vii.1968 (CNCI); California: Marin Co.:, Stinson State Beach, under seaweed on sand beach (K.J.Ahn & J.S.Ashe), 14.v.1991 (KSEM); Los Angeles Co.: 5, Santa Catalina Isl., Descanso Beach, under seaweed on rocks with numerous Diptera larvae (K.J.Ahn), 31.v.1991 (KSEM); 2 specimens, Sonoma Co.: 34.5 km SWW Santa Rosa, Bodega Head, University of California Marine Laboratory, 38º19.013'N 123º04.254'W ± 10m, seashore, in seaweed (V.I.Gusarov), 4.vi.2002 (KSEM); Santa Cruz Co.:, 10.5 km NW Davenport, nr. Hwy. 1, nr. Greyhound Rock, 37º04.821'N 122º16.062'W ± 6m, seashore, in seaweed (V.I.Gusarov), 19.vi.2002 (SPSU); Mendocino Co.: 2, Needle Rock, on beach (D.Giuliani), 6.x.1974 (UCR); San Francisco Co.:, 2, without locality label (MCZ); CANADA: British Columbia: 2, 2, Miracle Beach, 17 mi. S Campbell River (J.M. & B.A.Campbell), 22.vii.1975 (CNCI);,, Massett (BMNH). Diagnosis. Adota maritima is very similar to Ad. gnypetoides, but differs in having larger body size, longer antennal segments (Figs. 18; 17), wider apex of median lobe (Figs. 23­24; 35­36), posterior margin of male tergum 8 emarginate medially (Fig. 19) and larger spermatheca (Figs. 29­30; 40­41). Adota maritima differs from Ad. colpophila by having matte body, posterior margin of male tergum 8 with four blunt projections (Fig. 19), median lobe with blunt apex (Figs. 23­ 24; 46­47) and the distinct shape of spermatheca (Figs. 29­30). Description. Length 2.5­3.2 mm. Body black with dark brown legs and light brown tarsi. Head surface matte, with strong and dense isodiametric microsculpture, with fine punctation, distance between punctures equals 1­2 times their diameter. Frons with sparser punctation, in both sexes with longitudinal impression. Temple length to eye length ratio 1.0­1.2. Antennal article 2 is 1.1 times as long as article 3, articles 4­5 slightly elongate (length to width ratio 1.2­1.3), articles 6­7 as long as wide, articles 8­10 slightly transverse (length to width ratio 0.8) (Fig. 18). Pronotum subquadrate or slightly transverse, 1.1 times as wide as head, width 0.47­ 0.61 mm, length 0.41­0.51 mm, width to length ratio 1.2; matte, with strong and dense isodiametric microsculpture; punctation finer than on head, poorly visible on matte background. Elytra much wider (0.63­0.89 mm) and longer (0.57­0.79 mm; measured from humeral angle) than pronotum (elytral length to pronotal length ratio 1.5), 1.1 times wider than long, surface matte, with strong and dense isodiametric microsculpture; punctation poorly visible. Abdominal terga matte, with strong and dense isodiametric microsculpture; with fine punctation, distance between punctures equals 2­3 times their diameter on terga 3­5 and 3­ 5 times on terga 6­7. Apical margin of tergum 7 with white palisade fringe. Posterior margin of male tergum 8 with four blunt projections, emarginate medially (Fig. 19). Aedeagus as in Figs. 23­28, median lobe with wide apex (Figs. 23­24). Spermatheca as in Figs. 29­30. Discussion. The types of Homalota maritima, Atheta massettensis, At. subintima, At. setositarsis, At. scortea, At. scolopacina and At. insons fall within the range of variability of Adota maritima and have similar shape of genitalia and male abdominal tergum 8. The holotype of Atheta insons is smaller (pronotal width 0.47 mm) than most specimens of Adota maritima. However, it differs from Adota gnypetoides by the wide apex of median lobe and the shape of posterior margin of the male tergum 8, and I interpret it as a small specimen of Ad. maritima. Examined specimens of Ad. maritima from southern California are smaller than the specimens from British Columbia and Alaska and approach in size examined specimens of Ad. gnypetoides. Additional collecting is needed to study the variability of Ad. maritima. Distribution. Known from the Pacific coast of North America, from Alaska to California (Fig. 52). Natural History. Adota maritima is a littoral species, common in decomposing seaweed on a beach.