Laemosaccus clytrinoides Hespenheide, 2019

Hespenheide, Henry A., 2019, A Review of the Genus Laemosaccus Schönherr, 1826 (Coleoptera: Curculionidae: Mesoptiliinae) from Baja California and America North of Mexico: Diversity and Mimicry, The Coleopterists Bulletin 73 (4), pp. 905-939 : 924-927

Laemosaccus clytrinoides Hespenheide , new species

Zoobank.org/ urn:lsid:zoobank.org:act:4CE73F2F-92B8-4C30-8603-C0E39211364F ( Figs. 13 , 23 )

Description. Holotype Male. Length 2.65 mm, width 1.25 mm ( Fig. 13 ). Robust, subcylindrical in cross section, slightly obovate, broadly rounded behind, more narrowly so in front, black except each elytron with oval red-orange spot slightly longer than half length of elytra beginning at humerus, from near lateral margin to obliquely posteriorly to 1 st elytral interval, and broadly rounded behind; pronotum and elytra glabrous; thorax and abdomen ventrally with punctures each with a small silvery seta, head with few setae behind eyes and inconspicuous hair-like setae on sides of rostrum distal to antennal insertions, setae inconspicuous on legs, hair-like and semi-erect on tergite 8; tergite 7 with small, scale-like setae on basal margin, otherwise glabrous. Head hemispherical, 0.65 mm wide, rostrum rounded-terete, slightly humped at base in lateral view, finely punctate except for narrow raised area along midline at middle, 0.45 mm long; antennae inserted at middle. Pronotum gibbous, weakly convex in cross section at base, more strongly so in lateral view, anterior 2/3 strongly declivous, weakly constricted before anterior margin, 0.9 mm long, 1.05 mm wide, broadest at basal third, with lateral margins regularly rounded, coarsely, evenly punctate, punctures rounded and separate, without obvious medial carina. Elytra slightly wider than pronotum at base, broadest at apical 3/4, 1.75 mm long, 1.25 mm wide, elytral striae narrower than intervals, striae finely punctate, intervals rounded-angulate, interval 3 weakly toothed on middle third, interval 5 very weakly toothed on apical half. Abdominal ventrite 1 very slightly depressed in small triangle along midline at posterior margin, with less conspicuous setae. Profemora with very small, acute ventral tooth beyond middle. Genitalia as in Fig. 23 ; aedeagus 0.65 mm long.

Allotype Female. Length 2.65 mm, width 1.25 mm, as male but rostrum forming a slight angle with plane of fronst, very stout and subcylindrical, somewhat flattened dorsoventrally, finely to moderately punctate, with narrow, raised, polished area along midline on basal 2/3; abdominal ventrite 1 medially convex, sparsely setose and somewhat shiny in broad area on either side of midline; tergite 7 weakly convex, coarsely punctate, glabrous except with small, scale-like setae on basal margin at basal margin, hair-like and semi-erect on apical fourth.

Specimens Examined. Holotype: Arizona : Cochise Co., Chiricahua Mts. , E Turkey Creek, 6.5 mi. W Portal, 6400’, 31°54-55’N 109°15’W, 16.07.1981, H. A. Hespenheide, on Quercus sp. (USNM). Allotype: Same data as holotype, but 11.07.1981, Quercus (USNM) . Paratypes: USA: Arizona: Cochise Co., Chiricahua M., 29.07.1955, D. J. & J. N. Knull (1, OSU); same data as holotype, but 17.07.1981, Quercus (1, CHAH), 20.07.1981, H. A. Hespenheide, oak (1, CHAH); Cave Ck. Cyn., Chiricahua Mts., 6 mi. W Portal, 6700’, 31°55’N 109°15’W, 11, 20.07.1981, H. A. Hespenheide, Quercus (4, BMNH, CHAH); Cave Ck. Cyn., Chiricahua Mts., Herb Martyr Dam, 5800’, 31°52’N 109°14’W, 25.07.1981, H. A. Hespenheide, oak (1, CHAH); Chiricahua Mountains, Onion Saddle, 7600’, 31°56’N 109°16’W, 22.07.1981, H. A. Hespenheide, Quercus (1, CHAH), 26.06.2001, H. A. Hespenheide, on Quercus hypoleucoides (1, CHAH); Portal, 17.06.1956, H. & A. Howden, beat oak (3, CMNC); S. W. Res. Sta., Portal, 24.06.1956, H. & A. Howden, beating oak (4, CMNC), 04.07.1956, H. & A. Howden, oak (4, CMNC); Chiricahua Mountains, 2.0 mi. W Portal, 5000’, 27.07.1982, R. S. Anderson (1, CMNC); near Portal, 28.07- 07.08.1966, K. Stephan (1, FSCA); Chiricahua Mts., 9 mi. above Portal, 22.07.1975, G. H. Nelson, on Quercus hypoleucoides A. Camus (1, ASUHIC); Chir. Mts., Pridham Cn, 05.07.1976, McCleve & Daneker (2, TAMU); Chir. Mts., W Turkey Ck, 05.07.1976, McCleve & Topham (1, TAMU); Mile High Preserve, Ramsey Cyn, 12 km S Sierra Vista, 1700 m, 25.06- 6.07.1986, B. V. Brown, Malaise, oak/juniper ripar. for. (1, CMNC); Pelencillo Mtns., 33 mi. E Douglas, 17.07.1973, S. McCleve, at light (1, TAMU) Cochise Stronghold, Dragoon Mts., 22.06.[1958], C. W. & L. O’ Brien, on oak (1, ASUHIC); Sunnyside, 17.08.1940, B. E. White (1, CASC); Huachuca Mts., 1-4 km S Sunnyside Canyon, 1676m, 27.07.1989, R. S. Anderson, on Phoradendron coryae Trel. on Quercus sp. , 89-28 (2, CMNC); Huachuca Mts., vic Ramsey Vista cpgrds., 29.08.2000, J. Huether (1, CMNC); S end Huachuca Mtns., Copper Cyn., 5.08.1990, W. F. Barr, beating Quercus (1, WFBM); Huachuca Mts., Copper Cyn., 12.08.1989, W. F. Barr, on oak (1, WFBM); Huachuca Mts., 20.07.1936, J. N. Knull (1, OSU), 19.08.1950, D. J. & J. N. Knull (1, OSU), 18.07.1938, D. W. Gralk (1, SEMC); Bear Creek, Montezuma Pass, Huachuca Mts., 6.07.1956, H. & A. Howden (1, CMNC); Graham Co., Galiuro Mts., High Cr., 1660 m, [--].07.1978, S. McCleve (1, TAMU); Pima Co., 4 mi. S Arivaca, Fraguita Wash, 10.07.1977, S. McCleve, at lite (1, TAMU); Santa Cruz Co., Santa Rita Mts., 13.08.1935, F. H. Parker (1, CASC), 11.07.1949, D. J. & J. N. Knull (1, OSU); Santa Rita Mts., Madera Cyn., 25.06.1968, C. W. O’ Brien (1, ASUHIC), 11.07.1977, A. E. Lewis (2, ASUHIC); Madera Canyon, Bog Spring Camp, 4.08.1950, B. E. White (1, CASC); Madera Canyon, 1- 2.08.1988 (1, CHAH), 8.08.1970, A. J. Gilbert (1, ASUHIC); 7 mi. SW Canelo, 10.09.1965, L. & C. W. O’ Brien (1, ASUHIC); Sycamore Cyn. crest, 5700’, 29.08.1997, Wappes & Turnbow (1, JEWC); Pajarito Mts., Pena Blanca Cyn., 13.07.1970, K. Stephan (1, FSCA); Patagonia Mts., Duquesne Rd. Summit, 31.07.2005, C.W. O’ Brien, beaten oak & juniper (1, ASUHIC). Mexico: Sonora: Sierra de Ajos, Cyn. de Evans, 15.07.1970, V. Roth (1, FSCA); 5 mi. S Cananea, 1.08.1970, V. Roth (1, ASUHIC); Sierra Huachinera, 32–34 km NE Nacori Chico, 1950 m, 06– 7.08.1982, Mex.Exped. 1982, G. E. & K. E. Ball & S. McCleve, 82-10 (1, CMNC).

Hosts. Adults have been collected on Q. hypoleucoides and undetermined oaks, and on Phoradendron coryae Trel. ( Santalaceae ) on Quercus sp.

Etymology. This species is named for its resemblance to clytrine chrysomelids (see discussion of mimicry below).

Discussion. Laemosaccus clytrinoides is a small species similar to L. arizonensis but with a rostrum in both sexes that is sculptured and broader than deep, broadening toward the apex with a medial impunctate area, and a distinctive aedeagus. Males vary in length from 2.40 to 3.40 mm (mean = 2.84 mm, n = 33); females from 2.25 to 3.70 mm (mean = 2.93 mm, n = 25).

Figures

Figs. 13–18. Laemosaccus species, dorsal habitus. 13) L. clytrinoides; 14) L. howdenae; 15) L. rileyi; 16) L. vaurieae; 17) L. westcotti; 18) L. texanus.

Figs. 19–24. Laemosaccus species, dorsal and lateral views of aedeagus and paramere. 19) L. andersoni; 20) L. arizonensis; 21) L. bimaculatus; 22) L. burkei; 23) L. clytrinoides; 24) L. howdenae.