Panscopus (Nocheles) schwarzi Buchanan, 1927

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 : 53-54

Panscopus (Nocheles) schwarzi Buchanan, 1927

( Figs. 21 , 47 , 70 , Map 22 )

Panscopus (Nomidus) schwarzi Buchanan 1927: 30 .

Schenkling and Marshall 1931: 41; Buchanan

1936: 15; Blackwelder 1939: 66.

Panscopus schwarzi ; Hatch 1971: 291; O’ Brien and Wibmer 1982: 63.

Type Material. Holotype female ( USNM No. 28914): “Alta, Ut., June 29 [no year indicated], Coll. Hubbard & Schwarz.”

Specific Epithet. A Latinized genitive patronym, based on the surname of Eugene Amandus Schwarz, who, along with Henry Guernsey Hubbard, collected the type specimen of this species and many other weevil species in western North America in the early part of the 20 th century .

Diagnosis. The subgeneric characters noted above plus the following character states distinguish adults of P. schwarzi and P. coloradensis from those of other species of Panscopus : alternate elytral intervals elevated, even intervals flat and without, or nearly without, setae; rostrum with indistinct carina or non-carinate; tibia 3 slightly bent, its lower edge broadly convex and with some coarse brownish spines on ventral margin in apical third; prementum without median carina. Specimens of P. schwarzi are distinguished from those of P. coloradensis by the clump of six to ten flattened, scale-like, usually light buff-colored supraorbital setae present on the former.

Redescription. Females: Length 5.78–7.53 mm (n = 10); width across elytra 2.59–3.10 mm (n = 10). Males: Length 5.84–6.75 mm (n = 10); width across elytra 2.22–2.66 mm (n = 10). Color: Brown. Head: Transverse depression at base of frons slight, rostrum and frons nearly continuous in lateral view; thin, shiny median longitudinal carina present on rostrum in some specimens, obscured by vestiture in some; lateral rostral carinae not evident, or hardly evident through vestiture in some specimens; nasal plate evident, without dense vestiture; vestiture of rostrum and frons of dense scales; supraorbital group of stout setae present. Antennae: Scape short, extending to only anterior margin of eye, with vestiture of dense scales and setae, integument obscured; funiculus (antennomeres 2–8) with long setae near apex of each article, appressed, small, fine setae elsewhere, integument visible. Pronotum: Approximately 1/5 wider than long in females, slightly narrower in males; median longitudinal sulcus smoothly rounded, not sharply delimited at margins; surface of pronotum irregular, vestiture of dense scales and scattered setae, integument not visible. Elytra: Broadly oval, combined width approximately 70% of length in females; slightly narrower, on average, in males; declivity evenly rounded to apex in lateral view in males; posterior margin slightly reflexed in females; alternate intervals slightly raised over even intervals, alternate intervals with double and partly triple rows of setae; even intervals without setae, or nearly so; serial pits each with round scale larger than surrounding scales; vestiture elsewhere of dense overlapping scales. Legs: Tibiae 1, 2, and 3 with stiff, amber-colored to brown spines on ventral margin in apical half; tibia 3 curved ventrally in profile; corbellar area narrowly and indistinctly closed. Abdomen: With 5 ventrites in both sexes, ventrite 1 concave at middle in males, convex in females. Genitalia: Females ( Figs. 21 , 47 ): Sternum VIII with apical expansion about 1/4 total length; vagina short, about as long as coxites; pair of crescent-shaped sclerites anteriorly near confluence of common oviduct. Males ( Fig. 70 ): Aedeagus decurved in lateral view; apex of median lobe with angular acuity medially; manubrium of tegmen about as long as median lobe; median struts 1/2 longer than median lobe; internal sac with large, round, horse shoe-shaped sclerite, and smaller, v-shaped sclerite.

Life History. Adults were collected during the period May–August.

Plant Associations. Adults were collected from plants of the species Physocarpus malvaceus (Greene) Kuntze (Rosaceae) , Polemonium albiflorum Eastw. (Polemoniaceae) , and Symphoricarpos oreophilus A. Gray.

Geographical Distribution. This species lives in the Wasatch Mountains of northern Utah and isolated localities in Idaho and western Montana ( Map 22 ). Elevation records from specimens collected in Montana range from 1,220 to 1,520 m . Elevation records from the Wasatch Mountains vary from 2,130 to 2,600 m .

Chorological Affinities. The ranges of this species and P. coloradensis are adjacent to one another, but not overlapping.

Material Examined. In addition to the holotype, approximately 120 specimens of this species were examined. USA: Idaho: Idaho Co., Lolo Trail, Bitter Root Mountains, VI.1902, C.V. Piper (1, USNM) . Shoshone Co., Wallace , 9.VII.1916, Otto Huellman Collection (1, UICM) ; Wallace , 17.VI.1917, Otto Huellman Collection (1, UICM) . Valley Co., McCall , 10.VI.1933, F.H. Shirck (1, OSAC) . Montana: Lewis and Clark Co., Highway 200, 23 mi. E. Lincoln , 24.V.1988, S.M. Clark (1, CMNC) . Mineral Co., Saltese , 11.2 km W., 23.VI.1957, H.S. Dybas (3, FMNH) ; Clark’ s Peak, Cabinet National Forest , 1220–1520 m., B. Malkin (3, FMNH) . Utah: Cache Co., Logan Canyon , 17.V.1951, N.T. Packer (1, UCDC) . Summit Co., Cobble Creek 24 km E Kamas 2600m, 2. VII.1987, T.G. Spanton (1, CMNC) . Utah Co., Aspen Grove , 9.VII.1969, W.E. Clark (12, CWOB) ; Aspen Grove, Mt. Timpanogos, 5& 7.VII.1935, Van Dyke collection (10, CASC; 1, CMNC); Glacier Lake , Timpanogos, V.M. Tanner (3, USNM) ; Hwy 80, 24. VIII.1966, L. & C. O’ Brien (1, FMNH; 6, CWOB); Hwy 80 summit, 1.6 km E., 24.VIII.1966, L. & C. W. O’ Brien (3, CWOB) ; Mt. Timpanogos , 23.VI.1950, G. Bohart & G. Knowlton (2, UCDC) ; Provo Canyon , 3.VII.1968, W.E. Clark (11, CWOB) ; Timpanogos Haven , 4.VII.1967, D.R. Harris (3, TAMU) ; Timpooneke Campground , 18 km E Alpine, hwy 92, 21.VII.1987, T.G. Spanton, Symphoricarpos oreophilus (3, CMNC) ; Wasatch Mountains, Aspen Grove Campground, 2130 m, 25.VI.1962, C.W. O’ Brien, Physocarpus malvaceus (5, CWOB; 1, PURC; 2, OSUC); Wasatch Mountains , Big Tree Campground , 2410 m, 25.VI.1962, C.W. O’ Brien ,

Polemonium albiflavum (1, AMNH; 1, BMNH; 2, CMNC; 20, CWOB; 1, KSUC); Upper Rock Canyon , 4.VII.1968, W.E. Clark (6, CWOB) . Wasatch Co., Bryants Fork , near Strawberry Reservoir, 21.VI.1990, S.M. Clark and M.F. Whiting (1, CMNC) .

Figures

Map 22. Geographical distribution of Panscopus schwarzi.

Figs. 17–26. Panscopus species, sternum 8 (spiculum ventrale), ventral (a) and left lateral (b) views. 17) P. torpidus; 18) P. ovalis; 19) P. tricarinatus; 20) P. bufo; 21) P. schwarzi; 22) P. coloradensis; 23) P. aequalis; 24) P. squamifrons; 25) P. abruptus; 26) P. rugicollis. Scale bar = 1 mm.

Figs. 47–52. Panscopus species, coxites and vagina, dorsal (a), ventral (b), and left lateral (c) views. 47) P. schwarzi; 48) P. coloradensis; 49) P. aequalis; 50) P. squamifrons; 51) P. abruptus; 52) P. rugicollis. cx = coxites; st = stylus. Scale bar = 1 mm.

Figs. 68–70. Panscopus species, aedeagus, dorsal (a), ventral (b), and left lateral (c) views. 68) P. tricarinatus; 69) P. bufo; 70) P. schwarzi. b = belt of tegmen; is = internal sac; mb = manubrium of tegmen; ml = median lobe; ms = median strut; t = tegmen. Scale bar = 1 mm.