Orchestomerus whiteheadi Colonnelli, 1991

Yoshitake, Hiraku & Anderson, Robert S., 2015, A Review Of The Genus Orchestomerus Dietz (Coleoptera: Curculionidae: Ceutorhynchinae: Cnemogonini) Of The Usa, The Coleopterists Bulletin 69 (4), pp. 565-578 : 575-576

Orchestomerus whiteheadi Colonnelli, 1991 ( Figs. 7, 8 , 33–40 )

Orchestomerus whiteheadi Colonnelli 1991: 274 (type locality: “ Arizona, Santa Rita Mts.”). Korotyaev and Anderson 2002: 753 (biology); Colonnelli 2004: 77 (catalog).

Diagnosis. Orchestomerus whiteheadi is characterized mainly by the following points: body mostly dark brown; rostrum much stouter; prothorax with sides narrowing in straight line from middle to subapical calli; median paired prominences on pronotum stronger and sharper; elytral intervals rugged with relatively large and sharp granules; elytral sides hardly bisinuate on basal half of each side; middle tibiae mucronate in males, but hind tibiae simple apically in both sexes; corbels basally indefinitely angulate on middle and hind legs; and apical margin of male abdominal ventrite 5 strongly roundly produced in the middle.

Redescription. Male. LB = 2.25–2.53 mm (mean 2.41 mm). WF = 0.23–0.26 mm (mean 0.24 mm). LR = 0.83–0.93 mm (mean 0.88 mm). WR = 0.24–0.28 mm (mean 0.25 mm). WAR = 0.25–0.28 mm (mean 0.26 mm). LP = 0.84–0.98 mm (mean 0.93 mm). WP = 1.08–1.21 mm (mean 1.17 mm). LE = 1.60–1.81 mm (mean 1.71 mm). WE = 1.71–1.96 mm (mean 1.85 mm). n = 5 for all measurement variables. Habitus as shown in Figs. 7 and 8 . Integument mostly dark brown, except apices of rostrum, prothorax, elytra, femora, and tibiae tinged with red; antennae and tarsi paler. Body mostly covered with hair-like to linear scales; head mostly covered with light-colored scales; prothorax and elytra mottled with dark and light-colored scales, sparsely mingled with white, ovate to elliptic scales. Pygidium mostly covered with brownish hairs and hair-like scales, except lower margin fringed with white scales. Head coarsely, reticulately punctured; forehead between eyes relatively wide, weakly impressed, carinate along midline. Rostrum relatively stout, LR/WR 3.32–3.70 (mean 3.50), nearly as long as prothorax, LR/LP 0.93–0.99 (mean 0.95), nearly as wide as forehead, WR/WF 1.02–1.06 (mean 1.05), WAR/WF 1.05–1.11 (mean 1.07), strongly carinate from base to subapical part along midline; carina flanked by 2 shorter carinae on basal half; apex subglabrous, nearly as wide as portion above antennal insertions, WR/WAR 0.95–1.00 (mean 0.98). Antennae inserted at middle of rostrum. Prothorax slightly wider than long, WP/LP 1.24–1.28 (mean 1.25); pronotum with a pair of acute prominences on middle, not ridged; sides narrowing in straight line from middle to subapical calli. Elytra nearly as long as wide, LE/WE 0.91–0.94 (mean 0.93), slightly less than twice as long as prothorax, LE/LP 1.79–1.91 (mean 1.84), much wider than prothorax, WE/WP 1.55–1.62 (mean 1.59); each interval rugged with relatively large and sharp granules; intervals III, V, and VII with well-developed, precipitous prominences on subbasal parts, respectively; sides hardly bisinuate on basal half. Metasternum with relatively shallow receptacle for rostrum. Mid- and hind tibiae faintly angulate at base of each corbel; mid-tibiae with indefinite angles basally on outer margins, short and stout, mucronate apically; hind tibiae simple apically, not mucronate. Venter subopaque, weakly shiny; ventrites III and IV flattened on middle; apical margin of ventrite V strongly roundly produced in the middle, with weak lateral impressions. Pygidium evenly moderately convex, not sulcate. Spiculum gastrale ( Fig. 35 ) short, slightly longer than aedeagal body or its apodeme, weakly curved leftward. Tegmen ( Fig. 36 ) with well-developed apodeme, which is nearly half as long as diameter of ring. Aedeagal body ( Figs. 33, 34 ) relatively slender, narrowest at base, strongly expanded to basal 1/4, gradually narrowing to subapical part, then abruptly widened just behind apex, shallowly rounded at apex, weakly prominent on middle of basal part, thin, moderately curved ventrally, and tapered apically in profile; apodeme nearly as long as body. Endophallus ( Fig. 33 ) relatively short, much shorter than aedeagal body or its apodeme, basally with small and large patches of spicules; small patch composed of minute acicular spicules; large patch composed of larger acicular spicules, extending to postmedian part; spicules of larger patch become smaller and sparser apically; median part with very sparse, minute spicules, in addition to 2 flat sclerites; one of sclerites larger, plate-like, and another smaller, rain drop-shaped; apical part with a pair of slender, well-pigmented portions.

Female. LB = 2.29–2.78 mm (mean 2.61 mm). WF = 0.24–0.29 mm (mean 0.26 mm). LR = 0.88–1.05 mm (mean 1.00 mm). WR = 0.24– 0.29 mm (mean 0.27 mm). WAR = 0.25–0.31 mm (mean 0.29 mm). LP = 0.84–1.09 mm (mean 1.02 mm). WP = 1.09–1.33 mm (mean 1.25 mm). LE = 1.63–1.98 (mean 1.86 mm). WE = 1.74–2.15 mm (mean 2.02 mm). n = 5 for all measurement variables. Rostrum barely more slender, LR/WR 3.62– 4.05 (mean 3.77), nearly as long as prothorax, LR/LP 0.96–1.04 (mean 0.99), nearly as wide as or barely wider than forehead, WR/WF 1.00–1.07 (mean 1.01), WAR/WF 1.03–1.14 (mean 1.09), with shorter carina, which is limited on basal half; apex slightly wider than portion above antennal insertions, WR/WAR 0.90–0.97 (mean 0.93). Prothorax slightly wider than long, WP/LP 1.19–1.30 (mean 1.23). Elytra slightly shorter than wide, LE/WE 0.90–0.94 (mean 0.92), less than twice as long as prothorax, LE/LP 1.79–1.94 (mean 1.84), much wider than prothorax, WE/WP 1.58–1.64 (mean 1.62). Tibiae simple, not mucronate. Metasternum with deeper receptacle for rostrum. Ventrites I and II slightly inflated. Ventrites III and IV simple, not flattened on middle. Ventrite V simple, neither with impression nor glabrous portion on middle; lateral impressions weaker. Pygidium slightly smaller, with lateral margins more rapidly narrowing to shorter lower margin. Terminalia as illustrated in Figs. 37–40 . Sternite VIII ( Fig. 38 ) simple, with apodemes short, nearly as long as arms. Ovipositor ( Figs. 37, 39 ) simple, lacking sclerotized portion; coxites ( Fig. 39 ) nearly 3 times as long as styli; styli ( Fig. 39 ) slender, subcylindrical, more than twice as long as broad, inserted apically. Spermatheca ( Fig. 40 ) with cornu bilobed, bearing short projection at apex of each lobe; ramus less-marked; collum well-marked, abruptly convex; gland moderate in length, nearly twice as long as body. Otherwise, as in males.

Type Material. The holotype ( USNM, BLNO 003146 ) and 23 paratypes were examined by HY in 2012. In addition, a pair of paratypes exchanged between USNM and NIAES were examined in detail for this study .

Material Examined. USA: ARIZONA. Cochise County, Chiricahua Mountains: 3 km southwest of Portal , 1,646 m, 24. vii. 1989 , R. Anderson, on Vitis arizonica , 89-17 (2 males, 2 females, CMNC); 1.3 km east Southwestern Research Station , 1,606 m, 31.8815 -109.1932, 5.viii.2014 , R. Anderson , beating wild grape (6 males, 4 females, CMNC); 2.5 miles Southwest of Portal, 5,000′, 10. viii. 1983 , R. Anderson (5 males, 5 females, CMNC, NIAES); Cave Creek Canyon, 2.0 miles west of Portal , 27. vii. 1982 , R. S. Anderson (3 males, 5 females, CMNC); Idylwild Campground , 6. viii. 1986 , M. A. Ivie, beaten from wild grape (4 females, CMNC); Pinery Canyon , 6,600′, 22. vi. 1956 , H. & A. Howden (1 male, 1 female, CMNC); 3 miles northwest of Portal , 13. vii. 1973 , S. McCleve, on wild Vitis (1 female, CMNC). Cochise County, Huachuca Mountains: Carr Canyon , 30. vi. 1956 , H. & A. Howden (1 female, CMNC). Santa Cruz County: 3.2 km south Pena Blanca Lake , 1,250 m, 28. vii. 1989 , R. Anderson, 89-31 (1 female, CMNC); Sycamore Canyon , 9 miles west Pena Blanca Lake, 4,100′, 12. viii. 1983 , R. Anderson , in oak savanna (1 male, 1 female, CMNC) . NEW MEXICO. Hidalgo County, Peloncillo Mountains: Clanton Draw , 1,645 m, 9. vii. 1979 , S. McCleve (1 female, CMNC) .

Distribution. USA (Arizona, New Mexico) (MAP; red placemarker).

Natural History. Adults of this species are frequently beaten from wild grape, Vitis arizonica Engelm. , in the mountains of southern Arizona.

Figures

Figs. 1–8. Orchestomerus species,habitus.1–2) O. wickhami, male; 3–4) O. eisemani, holotype male; 5–6) O. marionis, male; 7–8) O. whiteheadi, male.

Figs. 25–40. Orchestomerus species, male genitalia and female terminalia. O. marionis: 25) Aedeagus, dorsal view; 26) Aedeagus, lateral view; 27) Sternite IX; 28) Tegmen; 29) Female terminalia; 30) Sternite VIII; 31) Coxite and stylus; 32) Spermatheca. O. whiteheadi: 33) Aedeagus, dorsal view; 34) Aedeagus, lateral view; 35) Sternite IX; 36) Tegmen; 37) Female terminalia; 38) Sternite VIII; 39) Coxite and stylus; 40) Spermatheca. Scale bar = 0.1 mm.