Panscopus (Pseudopanscopus) capizzii (Hatch, 1971)

Spanton, Timothy G. & Anderson, Robert S., 2016, A Taxonomic Revision of Weevils of the Genus Panscopus Schönherr (Coleoptera: Curculionidae: Entiminae: Tropiphorini), The Coleopterists Bulletin (mo 15) 70, pp. 1-86 : 22-23

Panscopus (Pseudopanscopus) capizzii (Hatch, 1971)

( Figs. 7 , 33 , 56 , Map 7 )

Pseudopanscopus capizzii Hatch 1971: 288 [in key]. Panscopus capizzii ; O’ Brien and Wibmer 1982: 62.

Type Material. Holotype female (C.A.S. Type No. 12453): “ Curry Co., ORE./ Douglas fir litter / Gold Beach / June 21, 1955 /Joe Capizzi; TYPE/ Pseudopanscopus / capizzii / 1968- M. Hatch [bright fluorescent orange label]; California Academy/ of Sciences/Type No. 12453” ( CASC) . Paratype (not seen): Same locality, date, and collector as holotype.

Notes about Synonymy. Hatch (1971) placed this species in the genus Pseudopanscopus with P. costatus . O’ Brien and Wibmer (1982) synonymized that generic name, placing P. capizzii and P. costatus in the genus Panscopus .

Specific Epithet. This is the latinized form of the surname of the collector of the type material, Mr. Joseph Capizzi.

Diagnosis. Adults of this species are distinguished easily from those of all other Panscopus species by the very deep, prominent longitudinal trough in the pronotum, and in having the costae of elytral intervals 3 and 5 interrupted near the elytral declivity, forming large rounded tubercles, each with a few to several blunt, flattened, coarse, striated scale-like setae. Panscopus capizzii is unique among Panscopus species in that males and females have uniformly flat abdominal ventrites 1 and 2, in contrast to other Panscopus species , where the females exhibit a slightly convex curvature to the surface of ventrites 1 and 2, and males exhibit a slight, but easily observable, concavity of these ventrites.

Redescription. Females: Length 6.1 mm (n = 1); width across elytra 2.9 mm (n = 1). Males: Length 5.8 mm (estimated from headless specimen, n = 1); width across elytra 2.5 mm (n = 1). Head: Transverse impression at base of frons shallow; rostrum non-carinate; angular nasal plate not clearly delineated, with sharp v-shaped carina; vestiture on frons and rostrum of dense overlapping scales, few setae present, 7 or 8 semi-erect, broad, flat setae in a close group supraorbitally. Antennae: Scape extending to anterior third of eye when next to head, with dense vestiture of scales and setae throughout, concealing integument; antennomeres 2–8 with few, thin, long primary setae and vestiture of thin, fine, short setae sparsely distributed on proximal articles, increasingly more dense on distal articles; antennomere 8 very slightly wider than long. Pronotum: Approximately 1/8 wider than long; lateral margins less convex than for most Panscopus species ; surface coarsely rugose-tuberculate; integument completely hidden by dense vestiture of overlapping striate scales, coarse, broad, striate, semi-erect setae scattered over surface, emanating from topographic high points; median longitudinal sulcus deep, broad, and length of pronotum. Metathorax: Metepisternal suture visible entire length as fine line. Elytra: Broadest at anterior sixth, narrowed posteriorly; combined width approximately 4/5 length, declivity broadly rounded in lateral view; alternate intervals elevated, even intervals nearly flat and non-setose; carinate alternate intervals interrupted, modified ele- vated tubercles at declivity in intervals 3 and 5 and near humeral angle in interval 7; setae on tubercles and other portions of alternate intervals decumbent to semi-erect, broad, flattened, and striate. Legs: Spines of ventro-lateral margin of tibiae 1, 2, and 3 not developed more than surrounding setae; corbel of tibia 3 indistinctly closed, with short, stout, acute setae inserted near corbellar area. Abdomen: With 5 ventrites in female; ventrites 1 and 2 flat in both sexes, not obviously convex in females or concave in males; vestiture of dense layer of overlapping scales and scattered, broad, flattened, decumbent to semi-erect setae. Genitalia: Females ( Figs. 7 , 33 ): Sternum VIII (spiculum ventrale) with apical expansion approximately 1/4 total length, broad and somewhat spade-shaped, slightly convex ventrally, round at apices, with fine setae apically, directed posteroventrally; coxites 1 and 2 broadly angular in dorsal or ventral view, narrowed apically, rounded apically in lateral view, styli with 3 primary setae apically; vagina membranous, without sclerotized structures; spermatheca sickle-shaped, tubular, medium in width, tapered toward apex. Males ( Fig. 56 ): Aedeagus thin dorso-ventrally, less recurved than most Panscopus species , apex of median lobe acute, tapered to thin point in lateral view, in dorsal view with narrow acute projection; manubrium of tegmen slightly shorter than median lobe of aedeagus; median struts as long as median lobe; internal sac with surface texture finely granular, with pair of sclerites apically (anteriorly, in inverted sac), sclerites flagellumlike, crescent shaped in dorsal and ventral views, sigmoid, tapered to acute apex in lateral view.

Life History. Adults have been collected in the months of June and July.

Geographical Distribution. This species occurs only in northwestern California and southwestern Oregon ( Map 7 ).

Chorological Affinities. See this topic for P. costatus above.

Material Examined. In addition to the type material, only two other specimens of this species were seen. USA: California: Humboldt Co., Bullrun Flat , Garberville , 27.VII.1934, Van Dyke Collection (1, CASC); Van Duzen River , 5.VI.1936; near Carlotta, Van Dyke Collection (1, CASC) .

Figures

Map 7. Geographical distribution of Panscopus capizzii.

Figs. 1–8. Panscopus species, sternum 8 (spiculum ventrale), ventral (a) and left lateral (b) views. 1) P. maculosus; 2) P. ovatipennis; 3) P. alternatus; 4) P. erinaceus; 5) P. impressus; 6) P. costatus; 7) P. capizzii; 8) P. convergens. Scale bar = 1 mm.

Figs. 33–36. Panscopus species, coxites and vagina, dorsal (a), ventral (b), and left lateral (c) views. 33) P. capizzii;

Figs. 56–58. Panscopus species, aedeagus. Dorsal (a), ventral (b), and left lateral (c) views of 56) P. capizzii and 57) P. convergens; dorsal (a), left lateral (b), and postero-dorsal (c) views of apex of 58) P. oregonensis. b = belt of tegmen; is = internal sac; mb = manubrium of tegmen; ml = median lobe; ms = median strut; t = tegmen. Scale bar = 1 mm.