Panscopus (Parapanscopus) maculosus Blatchley, 1916

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 : 11-12

Panscopus (Parapanscopus) maculosus Blatchley, 1916

( Figs. 1 , 27 , Map 1 )

Panscopus maculosus Blatchley 1916: 105 . O’ Brien and Wibmer 1982: 63.

Panscopus (Panscopus) maculosus ; Leng 1920: 312; Schenkling and Marshall 1931: 40.

Panscopus (Parapanscopus) maculosus ; Buchanan 1936: 6; Blackwelder 1939: 66.

Type Material. Holotype female: “TYPE (red label); Posey Co. / Ind. W.S.B./4-14-04; Purdue / Blatchley / Collection” ( PURC).

Notes about Classification. When he described P. maculosus, Blatchley (1916) did not place it in a subgenus, even though he was aware that Pierce (1913) had classified the 13 species of Panscopus known at that time in five subgenera. Leng (1920) and Schenkling and Marshall (1931) placed the species in the subgenus Panscopus sensu stricto, recognizing Pierce’ s (1913) subgeneric groupings. Buchanan (1936) further subdivided Panscopus sensu stricto, placing P. maculosus and P. ovatipennis in the subgenus Parapanscopus .

Specific Epithet. The Latin adjective maculosus (nominative case) means dappled or spotted. This refers to the mottled appearance of the dorsal integument, which is typical for this species.

Diagnosis. A pair of setae inserted near the anterior margin on the ventral face of the prementum, lack of a median longitudinal sulcus on the pronotum, scape with vestiture of elongate-fine setae which do not cover the integument, and the mottled or blotchy pattern of slightly lighter and darker setae on the dorsum distinguish specimens of P. maculosus from other species of Panscopus .

Redescription. Females: Length 6.2–8.3 mm (n = 15); width at widest point of elytra 2.9–3.9 mm (n = 15). Head: Broad, shallow lateral concavity between frons and rostrum, frons and rostrum discontinuous in lateral view; setae not even in distribution, clumps of 7–10 setae on frons supraorbitally. Antennae: Scape extending to middle of eye when next to rostrum, with vestiture of setae not obscuring integument. Pronotum: Wider than long, evenly convex dorsally, broadly rounded laterally; in dorsal view, surface uneven, with round or polygonal raised areas, each with a seta at center, many with indistinct ring of flat scales around seta; median longitudinal sulcus absent, but with line of paler, slightly cupreous scales along midline throughout length of pronotum. Elytra: Broad, irregular band of pale scales longitudinally on lateral margins at point of greatest convexity in dorso-ventral dimension; sutural intervals slightly raised, other intervals subequally convex, each with row of thin, acute, decumbent setae; partial double row on odd-numbered intervals; scales of serial punctures obvious, round and slightly larger than other scales; surface vestiture of nearly round, dense, overlapping scales in contrasting pattern of brown with patches of pale scales on disc of elytron at humeral angles and along sutural interval. Legs: Spines of ventro-lateral edge of tibiae 1 and 2 not pronounced, but pale-colored, as are other setae on tibiae, but longer than other setae; tibia 3 with small mucro at apex, corbellar area enclosed. Abdomen: With 5 ventrites; ventrites 1 and 2 convex at middle, ventral surface with dense vestiture of flat, round, appressed scales, and thin decumbent, and semi-erect setae. Genitalia: Tergum VIII broadly convex dorsally and somewhat conical in shape; sternum VIII (spiculum ventrale, Fig. 1 ) broadly spade-shaped in apical portion, convex ventrally, and rounded at apices, cleft medially in apical part, with very fine, short setae posteriorly; apical expansion of spiculum approximately 2/5 length of spiculum; coxites angular ( Fig. 27 ), narrowed apically in dorsal view, rounded apically in lateral view; styli each with 2 or 3 obvious setae apically, additional shorter setae visible at higher magnification; vagina short, joined to common oviduct a short distance from basal margin of coxites ( Fig. 27 ); vagina without sclerotized structures internally.

Life History. Females have been collected during the period April to July, with most specimen labels bearing dates in the months of May and June. This suggests that adults are active in spring and early summer. Other than this, nothing is known of the life history of these weevils. No males of this species were seen.

Plant Associations. Blatchley (1916) reported having taken specimens from bittersweet ( Celastrus scandens L.; Celastraceae ). No other plant information has been reported, and no such information was seen on specimen labels.

Geographical Distribution. This species is known from the eastern United States, principally west of the Appalachian Mountains. It occurs in IA, IN, KY, OH, and WV ( Map 1 ). The species has been recorded in the literature from Ontario, Canada (O’ Brien and Wibmer 1982), but no specimens have been seen to corroborate this record (Bright and Bouchard 2008).

Material Examined. In addition to the holotype, 28 specimens were examined. USA: Iowa: Boone Co., Ledges State Park , 25.VI.1949, S. Sparling (1, ISUI) . Johnson Co., Iowa City , 30. V., Wickham (4, USNM; CNCI) . Storey Co., Ames , 22.VI.1925, G.H. (1, ISUI) ; Wahoo, Ames (1, ISUI) ; Ames , 7.VII.1926, L.M. Harris (1, ISUI) . Ames , 13.VI.1930, L.E. Hiner (1, ISUI) . Ames , 16.V.1948 (1, AMNH) . Indiana: Lake Co., Lake Station , 21.IV.1907, E. Liljeblad (1, UMAA) . Posey Co., 5.VI.1903, Purdue Blatchley Collection (1, PURC) . Posey Co., W. S. B., 19.IV.1904, Blatchley collection (1, CWOB) ; W.S.B., 19. IV.1907, H. C. Fall collection (1, MCZC) . Tippecanoe Co., 6.VI.1970, N.M. Downie (1, FMNH) ; 4.VII.1965 (1, FMNH) ; 4.V.1979 (1, FMNH) ; 1953 (1, FMNH). Kentucky: Christian Co., 21. VI.1961, J.M. Campbell (1, USNM) . Jefferson Co., Louisville , 2.VI., H. Soltau Collection (1, USNM) ; Louisville , 22.VI.1890, H. Soltau Collection (1, USNM) . Todd Co., 18.IV., T.C. Barr (1, MCZC) . Ohio: Hamilton Co., Cincinnati , 9. VII., H. Soltau collection (1, USNM) ; Cincinnati , 25.VI.1892, H. Soltau collection (1, USNM) ; Cincinnati , 23. V., H.W. Wenzel collection (1, OSUC) . West Virginia: Kanawha Co., Camp Virgil Tate , 25.V.1989, S.M. Clark and L. Torres-Miller (1, CMNC) . One additional specimen is labeled “Col.” (1, ISUI) , but this may refer to Columbus, OH rather than Colorado (which is unlikely).

Figures

Map 1. Geographical distribution of Panscopus maculosus.

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. 27–32. Panscopus species, coxites and vagina, dorsal (a), ventral (b), and left lateral (c) views. 27) P.maculosus; 28) P. ovatipennis; 29) P. alternatus; 30) P. erinaceus; 31) P. impressus; 32) P. costatus. cx = coxites; st = stylus. Scale bar = 1 mm.