Haroldiataenius semipilosus (Van Dyke) Stebnicka & Skelley, 2009

Stebnicka, Z. Teresa & Skelley, Paul E., 2009, A revision of the genus Haroldiataenius Chalumeau (Scarabaeidae: Aphodiinae: Eupariini), Insecta Mundi 2009 (62), pp. 1-16 : 12-13

Haroldiataenius semipilosus (Van Dyke) , comb. nov.

( Fig. 4 , 8 , 20, 28)

Ataenius semipilosus Van Dyke 1928: 158 – Cartwright 1974: 34-36; Dellacasa 1988: 197 (catalogue).

Diagnosis. Clypeal margin rounded to weakly angulate each side of middle; surface finely punctate and weakly wrinkled. Pronotal coarse punctures evenly distributed, separated by 1-2 diameters, larger laterally, becoming small at medial anterior margin; basal marginal line distinct, width equal to coarse punctures. Elytral intervals evenly convex. Lateral margin of pronotum and elytron with fringe of short setae. Haroldiataenius semipilosus is found in the southwestern USA (Arizona, Texas) and northern Mexico.

Description. Length 3.2-4.2 mm. Dark castaneous, shiny ( Fig. 8 ). Clypeal margin finely reflexed, subdentate each side of moderately deep median emargination; genae rounded with clump of setae; surface narrowly concave above emargination and weakly transversely wrinkled, becoming obscure above median area, front and vertex with wide band of moderate punctures. Pronotum convex, sides and base arcuate, lateral margin crenate-fimbriate, setae moderate in length; surface quite evenly, coarsely punctate throughout, punctures separated by about one their diameter. Elytron convex, humerus sharply dentate, striae moderately deep punctate-crenate; intervals moderately convex, outside margin of each interval with row of fine punctures bearing fine, upright setae. Metasternum shining, finely punctate on disc, coarsely punctate-rugose at extreme sides; abdominal sternites with increasingly longer fluting along sutures and punctate from side to side, punctures finer at middle; sternite 5 and roughly eroded disc of pygidium with row of fine, long setae. Profemur posteriorly coarsely punctate; meso- and metafemora with scattered, setigerous punctures, posterior line of metafemur short ( Fig. 4 ); metatibia apically with short setae and strong, triangular accessory spine; basal tarsomere of metatarsus, upper tibial spur and next three tarsomeres combined equal in length. Epipharynx as in Fig. 20. Male genitalia short, weakly acute apically ( Fig. 28 ).

Type data. Holotype (not examined), “ Texas Pass, Dragon [Dragoon] Mountains, Arizona ”, “Van Dyke Coll”, in CASC.

Specimens examined (39). Mexico – (2 ex) Sonora, Hermosillo , 9-16.VII.1953, B. Malkin ( ISEA) . USA – (13 ex) Arizona, Cochise Co, Douglas , lite [sic], 18-22.VII.1972, S. McCleve Coll. ( FSCA); (2 ex) Arizona, Cochise Co, Peloncillo Mountains, Guadalupe Canyon , 1300me, UV light, 28.VIII.1982, R. S. Anderson, S. McCleve ( PESC); (1 ex) Arizona, Cochise Co, Texas Pass, Dragon [sic] Mts , 19.VII.1917, Wheeler ( FSCA); (2 ex) Arizona, Maricopa Co, Coon’s Bluff on Salt R., 19.VII.1985, W. B. Warner, UVBL ( PESC); (2 ex) Arizona, Maricopa Co., Fr. McDowell , 11.VII.1986, W.B. Warner, at light ( WBWC); (3 ex) Arizona, Maricopa Co, Phoenix, Salt River at Coon’s Bluff , 19.VII.1985, P.K. Lago ( PKLC); (1 ex) Arizona, Pima Co, Arivaca , 20.VII.1941, R. H. Beamer ( PESC); (1 ex) Arizona, Pima Co., Continental , 20.VII.1990, W. B. Warner, at light ( WBWC) ; Arizona, Pima Co., Green Valley , 28.VII.1990, W. B. Warner, at light ( WBWC); (2 ex) Arizona, Santa Cruz Co., Pena Blanca, Pajarito Mts. , 26.VII.1961, R. H. Arnett, Jr., E. VanTassell ( FSCA); (4 ex) Arizona, Santa Cruz Co., Pena Blanca Lake , 26.VII.1963, G. H. Nelson ( FSCA); (1 ex) Arizona, Santa Cruz Co, Nogales , 7.VII.1949, D.J.& J.N. Knull coll. ( FSCA); (2 ex) Arizona, Santa Cruz Co., 1 km S Rio Rico , 18.VII.1990, W. B. Warner, at light ( WBWC); (1 ex) Texas, 30 mi N of Presidio , 19.VII.1947, J.H. Russell, “ Ataenius semipilosus Van Dyke , det. O.L. Cartwight ” ( ISEA); (1 ex) Texas, Presidio Co., Candelaria , 15.VIII.1927, R. H. Beamer ( PESC) .

Remark. Most specimens of H. semipilosus have been collected at light, but a few were collected in Neotoma nests. Haroldiataenius semipilosus appears most similar to the partially sympatric H. lucanus (see remarks under H. lucanus ). However, H. semipilosus differs by its smoothly convex elytral intervals with scattered long setae and the incomplete posterior marginal line on the meso- and metafemora.

Figures

Figures 1-7. Haroldiataenius spp. 1) H. mariarum, lateral habitus. 2) H. hintoni lateral habitus. 3) H. lucanus, mesotibia. 4) H. semipilosus, mesotibia. 5) H. saramari, lateral habitus. 6) H. lucanus, lateral habitus. 7) H. limbatus, lateral habitus.

Figures 8-11. Haroldiataenius spp., lateral habitus. 8) H. semipilosus. 9) H. griffini. 10) H. buvexus, paratype. 11) H. convexus, holotype.

Figures 22-28. Haroldiataenius spp., male genitalia. 22) H. mariarum. 23) H. limbatus. 24) H. hintoni. 25) H. lucanus. 26) H. griffini. 27) H. saramari. 28) H. semipilosus.