Lymantes obrieni Anderson, 2016

Anderson, Robert S., 2016, A Taxonomic Revision of the GenusLymantesSchönherr, 1838 (Coleoptera: Curculionidae: Molytinae: Lymantini) in the United States Ofamerica, The Coleopterists Bulletin 70 (1), pp. 111-124 : 111-124

Lymantes obrieni Anderson , new species ( Figs. 12–13 , 18 , 23 )

Diagnosis. Eyes present, with 8–10 individually distinct convex facets arranged in 2–3 irregular rows

on slight ocular swelling ( Fig. 18 ). Punctures of body generally small, closely spaced, those of pronotal disc shallow, small, closely spaced, the distance between punctures slightly less than or subequal to the diameter of a puncture ( Fig. 13 ). Punctures of striae of elytral disc small, shallow and linearly arranged, interstriae distinct, about as wide as width of a strial puncture, disc with 25–30 punctures along each complete strial length ( Fig. 13 ). Dorsal vestiture very short and very fine, recurved, each seta shorter than diameter of puncture ( Fig. 12 ). Legs moderately robust, hind femora about 3–4X as long as wide, apex reaching to suture between ventrites 2 and 3. Aedeagus as in Fig. 23 .

Description. Male, length 4.1–4.2 mm, width 1.3–1.4 mm. Color moderately dark red-brown throughout. Head globose, minutely finely reticulate. Eyes present, with 8–10 individually distinct convex facets arranged in 2–3 irregular rows on slight ocular swelling. Rostrum rather broad, with antennae inserted at about apical 1/3 of length, slightly wider in dorsal view beyond antennal insertions, scrobes broadly visible at point of antennal insertions in dorsal view. Rostrum about 0.7–0.8X pronotal length, slightly arcuate in lateral view, dorsally somewhat flattened, moderately deeply, moderately densely punctate, punctures irregularly shaped, separated by less than their own diameter, row of punctures above scrobe coalescent, forming vague groove. Ventrally irregularly punctate, most punctures large, elongate, with median posterior extension represented by broad punctate ridge extended to base of rostrum. Antennae with scape almost reaching base of rostrum, funicle with articles 1 and 2 slightly elongate, subequal in length, articles 3–6 subquadrate, article 7 wider than long and very slightly wider towards apex. Pronotal width about 0.6–0.7X length, lateral margins slightly arcuate, widest about midlength, subapical constriction not evident dorsally, slightly evident laterally, disc with punctures moderately deep, moderately large, closely spaced, distance between punctures about same as diameter of a puncture, each puncture with a small, fine, appressed seta. Elytra about 1.8X as long as wide, lateral margins slightly rounded from behind humeri to apical 1/4, humeri not pronounced, discal striae with moderately large, moderately deep, linearly arranged punctures numbering more or less 25–30 per complete discal stria, interstriae finely punctate, shiny, about as wide as width of a strial puncture, punctures each with a fine, very short appressed seta. Striae 1–6 complete to base, 7 and 8 fused slightly anterior to level of metacoxae, not continuous to base, stria 10 terminatingd slightly anterior to level of metacoxa. Venter shallowly, moderately densely, regularly punctate, punctures well-spaced, except punctures absent on ventrites 3 and 4. Abdominal ventrites 1 and 2 very long, 1 about as long as ventrites 3–5 combined, 2 slightly shorter, ventrites 3 and 4 very short, subequal in length, ventrite 5 about twice as long as 3 and 4 combined. Legs short and more robust, sparsely shallowly punctate, punctures well-spaced, femora extending to suture between ventrites 2 and 3, about 3–4X as long as wide, tibiae straight, moderately robust, slightly shorter than length femora. Tarsi slender, ventrally with few scattered setae, tarsal claws very small, fine. Aedeagus with pedon short, very slightly longer than wide; internal sac with extensive internal sclerotization in form of a pair of distal band-like sclerites, one situated more dorsally, basally with pair of laterally situated long sinuate sclerites surrounding an irregularly shaped, indistinct median complex; struts short, about 1.5X length of pedon.

Female differing from male as follows: length 4.2–4.4 mm, width 1.3–1.4 mm. Rostrum with antennae inserted slightly proximad of apical 1/3 of length. Female not dissected.

Derivation of Species Name. I take pleasure in naming this species after Charles W. O’ Brien of Green Valley, Arizona. Through his love of collecting, Charlie has built one of the largest and most comprehensive weevil collections in the world and generously shared that collection and his knowledge with many young weevil students, myself (a long time ago) included.

Natural History. Specimens were collected in hardwood litter in moist situations in mountain canyons.

Distribution. This species is known from extreme western Texas and southeastern Arizona.

Material Examined. Holotype male ( CMNC), Texas : Culberson County, Guadalupe Mountains National Park , The Bowl, 7750’, 18 Jul 1975, S. Peck, oak litter . Paratypes as follows. Culberson County, Guadalupe Mountains National Park , The Bowl, 7750’, 18 Jul 1975, S. Peck, oak litter (1 female, CMNC) . Culberson County, Guadalupe Mountains National Park , McKittrick Canyon, 4 Sep 1986, P. Kovarik, leaf litter (1 female, CMNC) . Jeff Davis County, Fort Davis , Limpia Canyon, 25 Jul 1968, W. Suter, leaf litter from ravine slopes (1 male, CWOB) . Jeff Davis County, Davis Mountains State Park , 3 Sep 1986, P.W. Kovarik, leaf litter (1 male, 1 female, CWOB) . Arizona : Cochise County, Chiricahua Mountains , South Fork Road, 31.87905°N, 109.17732°W, 1568m, 3–6 Aug 2012, N.P. Lord and I.A. Foley, sifting fungusy oak litter at base of boulder (1 male, 1 female, CMNC) . South Fork Canyon , 31.8756 -109.1797, 1593m, 8 Aug 2014, R.S. Anderson, oak litter (1 male, CMNC) . Cave Creek Nature Trail , 31.8885 -109.1709, 1542m, 8 Aug 2014, C.W. & L. O’ Brien, oak litter (2 males, CWOB) .

Figures

Figs. 4–13. Lymantes species, lateral and dorsal habitus. 4–5) L. scrobicollis; 6–7) L. repens; 8–9) L. nadineae;

Figs. 14–18. Lymantes species, head, lateral view. 14) L. scrobicollis; 15) L. repens; 16) L. nadineae; 17) L. fowleri; 18) L. obrieni.

Figs. 19–23. Lymantes species, male aedeagus, dorsal view. 19) L. scrobicollis; 20) L. repens; 21) L. nadineae;