Panscopus (Nocheles) johnsoni Van Dyke, 1935

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 : 38-39

Panscopus (Nocheles) johnsoni Van Dyke, 1935

( Figs. 14 , 40 , 63 , Map 15 )

Panscopus johnsoni Van Dyke 1935: 9 . Hatch 1971: 290; O’ Brien and Wibmer 1982: 63; Bright and Bouchard 2008: 259.

Panscopus (Nomidus) johnsoni ; Buchanan 1936: 14; Blackwelder 1939: 66.

Type Material. Holotype male (CAS No. 3924): “Humptulips/ Wash./ V-29-1914; Van Dyke/ Collection; Panscopus / johnsoni / Van Dyke; Holotype.” ( CASC). The word Holotype is printed across the end of the label, highlighted in red. Allotype female (CAS No. 3934): “Humptulips / Wash. / V-29-1914; Van Dyke / Collection; Panscopus / johnsoni / Van Dyke; Allotype.” ( CASC). The word Allotype is printed across the end of the label, highlighted in red. The following paratypes were also examined: “Humptulips / Wash / V-29-1914; Van Dyke / Collection; Panscopus / johnsoni / Van Dyke / Paratype ”. The word Paratype is printed across the end of the label, highlighted in red, (4, CASC; 1, USNM; 1, WSU); “Humptulips / Wash. / V-29-1914; Van Dyke / Collection”, (2, CASC) . This accounts for eight of the nine paratype specimens mentioned by Van Dyke (1935).

Specific Epithet. A patronym, based on the surname of Professor O. B. Johnson, who Van Dyke (1935) described as “the pioneer entomologist of the Pacific Northwest”.

Diagnosis. Adults of P. johnsoni are distinguished from other species of Panscopus by a short scape, not extending beyond the anterior quarter of the eye and females with five ventrites, in combination with the following characters: dorsal scales, at least in part, green; elytra without tubercles; alternate elytral intervals costate; scape setose only, not squamose; rostrum slender, with thin median longitudinal carina.

Description. Females: Length 6.6 mm (n = 1), estimated from specimen with detached head); width across elytra 2.69 mm (n = 1). Males: Length 6.36–7.27 mm (n = 6); width across elytra 2.28–2.53 mm (n = 7). Color: Grey or beige and light green. Vestiture of scales arranged in large, irregular patches of greyish beige and pale metallic green or cupreous areas; integument, where visible through vestiture near joints of legs, antennae, and elsewhere, rufescent. Head: Transverse depression at base of frons weak, frons and rostrum continuous in lateral view; rostrum non-carinate; nasal plate glabrous, without dense greenish scales present on rest of rostrum and frons; v-shaped carina indistinct; small group of 6–8 slightly flattened, decumbent setae supraorbitally. Antennae: Scape relatively short, extending to anterior quarter of eye when next to head; vestiture of thin, decumbent, apically directed setae, rufescent integument visible through vestiture; antennomeres 2–8 with long, thin primary setae on apical half of each article, and thin, fine, appressed secondary setae on each article, apically directed, shiny integument not concealed by setae. Pronotum: Narrower in proportion to length than in other species of Panscopus , not more than 1/10 wider than long in both males and females; sides less convex than other species of Panscopus ; deep longitudinal sulcus medially, in anterior third pronounced carinae bound sulcus on either side; surface coarsely irregular, tuberculate; vestiture of dense, appressed, striate scales, some metallic green in color, and reclinate setae, each at apex of tubercle. Elytra: Combined width nearly 2/3 wider than pronotum in female, not quite 1/3 wider than prothorax in males; combined width approximately 70% of length in female, proportionately narrower in males; alternate intervals distinctly carinate, with row of decumbent, broad setae on each; even intervals flat and nearly non-setose; serial pits each with nearly round scale, larger than surrounding scales. Legs: Tibiae without obviously stiffened spines on ventral margin. Abdomen: Ventrite 1 concave at middle in males, slightly convex in females. Genitalia: Females ( Figs. 14 , 40 ): Sternum VIII (spiculum ventrale) with apical expansion small, approximately 1/4 or less of total length of spiculum; shape as in other Panscopus species ; vagina long, with pair of crescent-shaped sclerites near anterior end. Males ( Fig. 63 ): Aedeagus gently decurved, less so than in other Panscopus species ; apex broadly rounded; manubrium of tegmen approximately as long as median lobe; median struts 1/4 longer than median lobe; internal sac membranous, finely granular distad belt of tegmen, with group of acute, angular sclerites anteriorly in inverted sac.

Life History. Adult specimens have been collected in late May.

Geographical Distribution. This species is known only from Humptulips, Grays Harbor County, Washington ( Map 15 ) .

Material Examined. Only the type material listed above was seen.

Figures

Map 15. Geographical distribution of Panscopus johnsoni.

Figs. 9–16. Panscopus species, sternum 8 (spiculum ventrale), ventral (a) and left lateral (b) views. 9) P. acutisetus; 10) P. gemmatus; 11) P. spantoni; 12) P. squamosus; 13) P. michelbacheri; 14) P. johnsoni; 15) P. bakeri; 16) P. longus. Scale bar = 1 mm.

Figs. 37–40. Panscopus species, coxites and vagina, dorsal (a), ventral (b), and left lateral (c) views. 37) P. spantoni;

Figs. 62–64. Panscopus species, aedeagus, dorsal (a), ventral (b), and left lateral (c) views. 62) P. michelbacheri; 63) P. johnsoni; 64) P. bakeri. b = belt of tegmen; is = internal sac; mb = manubrium of tegmen; ml = median lobe; ms = median strut; t = tegmen. Scale bar = 1 mm.