Elytroleptus rufipennis ( LeConte, 1884 )

GRZYMALA, TRACI L. & MILLER, KELLY B., 2013, Taxonomic Revision and Phylogenetic Analysis of the Genus Elytroleptus Dugés (Coleoptera: Cerambycidae: Cerambycinae: Trachyderini), Zootaxa 3659 (1), pp. 1-62 : 40-42

Elytroleptus rufipennis ( LeConte, 1884)

( Figs. 16 , 38 )

Pteroplatus rufipennis LeConte, 1884: 23 .

Elytroleptus rufipennis ; Leng, 1886: 31; Fall & Cockerell, 1907: 192; Schaeffer, 1908: 330; Aurivillius, 1912: 456; Linsley, 1961b: 12; Linsley et al., 1961a: 22; Linsley et al., 1961b: 21; Linsley 1962a: 179; 1962b: 7; Chemsak & Linsley, 1965: 196; Emmel, 1965: 14, fig. 1; Chemsak & Linsley, 1975: 109; 1982: 57; Skiles & Chemsak, 1982: 70; Chemsak et al., 1992: 83; Monné & Giesbert, 1995: 148; Noguera & Chemsak, 1996: 402; Monné, 2005: 606; Monné & Hovore, 2006: 143.

Type locality. United States, Arizona .

Type information. Lectotype. Elytroleptus rufipennis ( MCZC, ♂) labeled: ‘Ariz./Type 3899/ P. rufipennis Lec. / LECTOTYPE Pteroplatus rufipennis LeConte Skiles & Chemsak, 1982 ’. Lectotype. Elytroleptus eros ( BMNH, ♀) labeled: ‘Type/ Oaxaca Mexico. Salle Coll./Sp. figured/B.C.A., Col. V. Elytroleptus eros Bates / Elytroleptus eros Bates / LECTOTYPE Elytroleptus eros Bates Chemsak & Linsley 1970 ’

Diagnosis. This species is distinguished from all other congeners by the following combination of characters: 1) elytra laterally expanded apically, greatest width>1.5 × width at humeral angle, 2) central pronotal disc piceous, 3) pronotum with longitudinal lines of dense, appressed rufo-testaceous pubescence overlying rufo-testaceous integument, and 4) abdominal sternites piceous. This species most closely resembles E. limpianus , and is easily distinguished by the black scutellar integument instead of testaceous or rufo-testaceous and the piceous central pronotal disc instead of testaceous and rufo-testaceous. It is distinguished from E. ignitus by the piceous pronotum and abdominal sternites instead of testaceous along with the metathoracic wings entirely dark tinted instead of with lightly tinted regions.

Description. Male. TL 10.9–14.4 mm, GW 4.2–5.4 mm. Body elongate, laterally expanded apically from humeri, dorsoventrally flattened.

Head. HL 0.8–1.0 mm, HW 1.5–1.8 mm, DBE 0.9–1.1 mm, DBA 0.7–0.8 mm. Piceous, except medial vertex, frons, clypeus, and labrum rufo-testaceous. Finely punctate with short, sparse, suberect to erect, testaceous pubescence, more dense on vertex; gular region glabrous; rugose posterior to lower eye lobe. Antennal tubercles moderately raised, subtriangular, and separated by approximate width of four antennal sockets. Genal apices generally rounded, width ½ × height. Eyes moderately large, finely faceted, lower lobe with about 25 facets at greatest height; integument ventral to lower lobe about 0.4 × eye height; deeply emarginated at antennal insertion, with 3–4 facets at greatest emargination point. Antennae black, extending to about 2/5 elytral length, scape and antennomere V subequal; pedicel about 1/3 × scape length; antennomeres III and IV subequal, each 2.5 × pedicel length; antennomeres V–VIII decreasing in length; antennomeres VIII and IX subequal; antennomere X shorter than IX; antennomere XI subequal to III, strongly appendiculate.

Thorax. PL 1.4–2.4 mm, PW 2.1–2.8 mm. Pronotum piceous, width slightly greater than length, apical width subequal to basal width, lateral margins angulated, widest medially. Pronotal disc shining, punctate, with short, recumbent, black pubescence arising from punctation; laterad to center, two (one on each side) distinct longitudinal, arcuate lines of dense, appressed, testaceous pubescence overlying areas of rufo-testaceous slightly raised integument, each of similar width throughout and occupying ¼ of pronotal disc area; punctation on shining areas deep, individual punctures differing in shape and diameter, majority strongly delimited; oval, more densely punctate areas dorsad of lateral margins indicative of sexually dimorphic gland pores; pronotal disc flat to slightly convex; sides impressed in dorsal aspect, margin apparently elevated, calli absent. Pro-, meso-, and metasternum dark brown to black, shining, with sparse, short, suberect to erect black pubescence. Scutellum piceous, small, subtriangular, length subequal to width, medially impressed, with short, moderately dense, recumbent, black pubescence.

Wings. EL 8.7–11.0 mm. Elytron rufo-testaceous. About 5.5 × PL, width at humeral angles about 1.3 × PW. Elytron laterally expanded apically, greatest width>1.5 × width at humeral angles. Elytron with 4 distinct costae; from suture, costa I arising from anterior margin and extending to 3/5 elytral length, costa II arising from anterior margin and extending to 4/5 elytral length, costa III more indistinct than others and extending from 2/5 (near middle of anterior margin) and extending to 4/5 elytral length, costa IV arising from humeral angle and extending to 4/5 elytral length; elytron with distinct but shallow punctation, 5–6 punctures between suture and costa I medially, increasingly irregular apically, puncture diameter decreasing slightly medially to basally; elytron with moderate short, suberect, rufo-testaceous pubescence, one seta per puncture, outer elytral margins with pubescence more dense. Metathoracic wing completely darkly tinted.

Abdominal Sternites. Piceous, shining; finely punctate, covered in sparse, short, suberect, black pubescence. Legs. Piceous, except profemora, protibia, mesofemora, and metafemora testaceous medially. Femora and tibia covered in sparse, suberect to erect, black pubescence, tarsal pubescence recumbent and more dense. Metatibia straight, not strongly sinuate. Genitalia: Sternite VIII sides gradually tapering towards apex, two slightly sinuate anterolateral areas (one on either side), often with slight concavity medially. Tergite VIII gradually expanding towards apex, generally rounded lacking sinuate areas, often with slight concavity medially.

elytral length; antennomeres V–XI less strongly serrate; antennomere XI less strongly appendiculate. Pronotum lacking sexually dimorphic densely punctate oval areas dorsad of lateral margins.

Intraspecific variation: Elytra varying from rufo-testaceous to testaceous; central pronotal disc with testaceous regions.

Phylogenetic relationship. This species is sister to the clade containing E. nigripennis and E. quadricostatus supported by the elytral length more than 5 × that of the pronotal length (Character 14) ( Figs. 31 , 32 ).

Distribution. Southwestern USA (Arizona, New Mexico) and Mexico (Chiapas, Durango, Hidalgo , Veracruz) ( Fig. 38 ).

Natural history. Flight period April through August. Specimens have been collected by sweeping grass ( Muhlenbergia longiligula Hitchc. ) and on the flowers of Melilotus albus Medik. and blossoms of Bumelia lanuginosa (Michx.) Pers. Linsley et al. (1961a) suggested that the lycid model for this species is Lycus sanguinipennis (Say) .

Material examined. MEXICO, Chiapas: Soyalo , 2 ♂, 18–19.iv.1959, Emmel, T.C. ( EMEC) ; Durango: Tepalcates , 1 ♀, 6.vi.1964, Howden, H.F. ( CNC) ; Hidalgo: Epazoyucan , 1 ♀, 17.vi.1961 ( EMEC) ; Veracruz: Misantla , 1 ♀, Hoege ( BMNH) ; USA, Arizona: Cochise Co., Portal , 1 ♀, 1 ♂, 1.viii.1975, Nelson, G.H. ( FSCA) ; Chiricahua Mtns. , 1 ♀, 29.vii.1955, Knull, D.J. & J.N. ( FMNH) ; 1 ♂, 22.vii.1908 ( EMEC) ; 1 ♀, 3.vii.1947, Wallace, H.S. ( SEMC) ; 1 ♀, 20.vii.1950, Beamer, L.D. ( SEMC) ; Huachuca Mtns. , 1 ♀, vii.1913, Schaeffer, C. ( AMNH) ; 1 ♀, 29.vii.1983, Nelson, G.H. ( DHPC) ; 1 ♀, 29.vii.1983, Nelson, G.H. ( FSCA) ; 1 ♀, 18.vii.1938, Sailer, R.L. ( SEMC) ; 1 ♀, vi.1915 ( USNM) ; Pima Co., Bear Canyon , 2 ♂, 4.viii.1948, Ball, G.E. ( AMNH) ; 1 ♂, 11.vii.1967, Gardner, R.C., Kovacic, C. R., & Lorenzen, K. ( EMEC) ; Santa Cruz Co., Santa Rita Mtns. , 1 ♀, Snow, F.H. ( MCZC) ; 1 ♂, --.vii.----, Snow, F.H. ( SEMC) ; Yavapai Co., Prescott , 1 ♂, vi. vii.1994, Bowditch, F.C. ( EMEC) ; 1 ♂, 29.vi.1909, Kusche, A. ( EMEC) ; New Mexico: San Miguel Co., El Porvenir , 1 ♀, Fenyes, A. ( MCZC) ; -- 1 ♂, Cazier ( AMNH) .

Figures

FIGURE 31. Three of six most parsimonious trees retrieved from phylogenetic analysis of Elytroleptus (L = 59, CI = 50, RI = 75). Numbers above branches are characters and numbers below branches are character states. Characters are optimized for

FIGURE 32. Strict consensus for six most parsimonious cladograms resulting from cladistic analysis of Elytroleptus. Numbers above branches are Bremer support values.

FIGURE 38. Distribution map for Elytroleptus rufipennis, Elytroleptus scabricollis, and Elytroleptus similis.

FIGURES 16–18. Dorsal habitus of Elytroleptus rufipennis (LeConte) (16), Elytroleptus scabricollis Bates (17), and