Elytroleptus luteus Dugés, 1879

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 : 34-36

Elytroleptus luteus Dugés, 1879

( Figs. 1 , 2, 3, 12, 36)

Elytroleptus luteus Dugés 1879: 185 ; Lameere 1883: 40; Bates 1885: 317; Aurivillius, 1912: 456; Blackwelder, 1946: 588; Chemsak & Linsley, 1965: 199; 1975: 110; 1982: 57; Chemsak et al., 1980: 33; Noguera & Chemsak, 1996: 402; Turnbow et al., 2003: 17; Monné, 2005: 605.

Elytroleptus luteus luteus ; Linsley, 1961a: 12; 1962b: 12; Chemsak et al., 1992: 83; Monné & Giesbert, 1995: 148; Turnbow et al., 2003: 17; Monné, 2005: 605; Monné & Hovore, 2006: 143; Hovore, 2006: 374.

Elytroleptus luteus davisi ; Linsley, 1961a: 12; 1962a: 180, fig. 53; 1962b: 12; Chemsak & Linsley, 1975: 110; 1982: 57; Skiles & Chemsak, 1982: 69; Chemsak et al., 1992: 83; Monné & Giesbert, 1995: 148; Monné, 2005: 605; Monné & Hovore, 2006: 143.

Elytroleptus davisi Knull 1940: 558 , fig. 6; Chemsak, 1977, 174.

Elytroleptus lineatus Knull 1950: 91 ; Linsley, 1961a: 11; 1962a: 179; 1962b: 12; Chemsak & Linsley, 1965: 195; Chemsak, 1977: 174; Chemsak & Linsley, 1975: 109; 1982: 57.

Type locality. United States, Texas, Davis Mountain Range .

Type information. Holotype. Elytroleptus lineatus ( FMNH, ♀) labeled: ‘Davis Mts., VI-21-49. Tex./D.J. & J.N. Knull Collrs/J.N. Knull Collection/ HOLOTYPE Elytroleptus lineatus Knull /Elytrolepta lineatus Knull det. J. Knull’. Holotype. Elytroleptus luteus davisi ( FMNH, ♂) labeled: ‘Davis M., VI-10-39 Tex/D.J. & J.N. Knull

Collrs/J.N. Knull Collection/ HOLOTYPE Elytroleptus davisi Knull /Elytrolepta luteus davisi Kn. det. J. Knull’ longitudinal lines of dense appressed pubescence, 3) pronotum shallowly punctate, 4) elytral punctation subequal medially and basally, and 5) elytra clothed with distinctly longer setae basally than apically. This species most closely resembles E. scabricollis , especially those individuals that possess concolorous testaceous elytra, and can be distinguished by the elytral punctation subequal medially, basally, and apically in addition to the absence of distinct pronotal calli. Males of E. luteus also possess sexually dimorphic prothoracic gland pores whereas males of E. scabricollis do not.

Description. Male. TL 5.3–10.2 mm, GW 1.5–2.7 mm. Body elongate, subparallel, dorsoventrally flattened.

Head. HL 0.5–0.7 mm, HW 0.9–1.4 mm, DBE 0.5–0.9 mm, DBA 0.4–0.6 mm. Testaceous except apices of mandibles, supraorbital area, and venter piceous. Finely punctate with short, sparse, erect, testaceous pubescence; gular region glabrous; rugose posterior to lower eye lobe. Antennal tubercles slightly raised, subtriangular, and separated by approximate width of four antennal sockets. Genal apices generally rounded, width greater than ½ × height. Eyes moderately large, finely faceted, lower lobe with about 25 facets at greatest height; integument ventral to lower lobe about 0.2 × eye height; deeply emarginate at antennal insertion, with 2–3 facets at greatest emargination point. Antennae black, extending to approximately 2/5 elytral length, scape, antennomere III, and IV subequal, pedicel 1/3 × scape length, antennomeres V–X decreasing in length, antennomeres VIII and IX subequal, antennomere XI longer than X and subequal to VI and moderately appendiculate.

Thorax. PL 0.9–1.8 mm, PW 1.1–1.9 mm. Pronotum testaceous, width slightly greater than length, apical width subequal to basal width, lateral margins slightly angulate, widest medially. Pronotal disc shining, punctate, with erect, testaceous pubescence arising from punctation, lacking longitudinal lines of dense, appressed pubescence; punctation on shining areas deep; individual punctures moderate and varying 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 black, shining, with sparse, erect, pale yellow pubescence. Scutellum piceous, small, subtriangular, length subequal to width, medially impressed, with short, moderate black pubescence.

Wings. EL 3.9–7.7 mm. Elytron pale yellow to testaceous. About 4.2 × PL, width at humeral angles about 1.1 × PW. Elytron subparallel, greatest width <1.5 × width at humeral angle. Elytron with 3 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 arising from humeral angle and extending to 3/5 elytral length; elytron with distinct deep punctation, 4–5 punctures medially between suture and costa I, slightly shallower apically, subequal basally; elytron with sparse, testaceous, erect pubescence, one seta per puncture, becoming shorter and suberect to recumbent apically, outer elytral margins with pubescence more dense. Metathoracic wing completely darkly tinted.

Abdominal Sternites. Piceous, shining; finely punctate, covered in sparse, short, suberect, pale yellow pubescence. Legs. Mesothoracic leg, metathoracic leg, and coxa of prothoracic leg piceous and shining. Prothoracic trochanter, femora, tibia, and tarsi testaceous. Metatibia slightly sinuate. Femora and tibia covered in sparse, suberect to erect, pale yellow pubescence. Tarsi covered in sparse, recumbent, black pubescence. Genitalia. Sternite VIII sides subparallel towards apex, two slightly sinuate anterolateral areas (one on either side), often with slight concavity medially. Tergite VIII subparallel towards apex, lacking sinuate areas, often with slight concavity medially.

Female. TL 8.1–12.0 mm, GW 2.4–3.2 mm, HL 0.7–0.8 mm, HW 1.2–1.5 mm, DBE 0.7–1.0 mm, DBA 0.5– 0.6 mm, PL 1.5–2.1 mm, PW 1.5–2.2 mm, EL 5.9–9.1 mm.

As male, except antennae extending to 1/5 elytral length; antennomeres V–XI less strongly serrate; antennomere XI less strongly appendiculate. Pronotum lacking sexually dimorphic densely punctate oval area dorsad of lateral margin.

Intraspecific variation. Pronotum and elytra range in color from pale yellow, to testaceous and rufotestaceous with regions of black. Several male specimens with integument black on densely punctate sexually dimorphic pronotal areas.

Phylogenetic relationship. This species is sister to E. scabricollis based on the pronotal punctation small and large in diameter (Character 7) ( Figs. 31 , 32 ).

Natural history. Adult specimens have been collected on flowers and foliage of plants in the families Euphorbiaceae ( Croton sp. ), Loganiaceae ( Buddleia cordata Kunth ), Ranunculaceae ( Clematis paucifolia Nutt. ), Rhamnaceae ( Condalia ericoides (A. Gray) M.C. Johnst. ), and Verbenaceae ( Lippia ligustrina (Lag.) Kuntze ).

Material examined. GUATEMALA, Baja Verapaz: Salama , 1 ♂, 1 ♀, 25–31.v.1989, Giesbert, E. ( FSCA) ; 2 ♂, 25–31.v.1989, Wappes, J.E. ( ACMT) ; Zacapa: San Lorenzo , 1 ♀, 30.v.2003, Woodruff, R.E. & Monzon, J. ( ACMT) ; 1 ♂, 3–6.vi.1989, Giesbert, E. ( FSCA) ; 1 ♂, 9.vi.1997, Giesbert, E. & Monzon, J. ( FSCA) ; HONDURAS, Zomorano : 1 ♀, 27.iv–5.v.1964, Axtell, G.A. ( EMEC) ; 1 ♀, 20.x.1979, Mankins, J. V. ( USNM) ; 1 ♀, 9.x.1978, Mankins, J. V. ( USNM) ; MEXICO, Chihuahua: Hidalgo del Parral , 1 ♂, 15.vii.1964, Chemsak, J.A. ( EMEC) ; Durango: Durango, 1 ♀, 31.vii.1964, Chemsak, J.A. ( EMEC) ; 1 ♂, 12.vii.1954, MacSwain, J.W. ( EMEC) ; Ventanas , 1 ♀, Hoge ( BMNH) ; Jalisco: Encarnacion de Diaz , 1 ♂, 9.vii.1982, M.A. Ivie ( MACI) ; Nayarit: Santa Maria del Oro , 1 ♂, 27.vi.1963, Doyen, J. ( EMEC) ; Oaxaca: 1 ♀, 6.vi.1938, Greenfield, R. ( EMEC) ; Sonora: Alamos , 1 ♂, 1 ♀, 30.vii–9.vii.1957, Westcott, R.L. ( EMEC) ; Yecora , 4 ♂, 1 ♀, 18.vii.2005, Swift & Hovore ( ISPC) ; Temescaltepec: Bejucos , 2 ♂, 5.vii.1933, Hinton, H.E. & Usinger, R.L. ( EMEC) ; Tejupilco , 1 ♂, 1 ♀, vii.1932, Hinton, H.E. & Usinger, R.L. ( EMEC) ; USA, Arizona: Cochise Co., Douglas , 1 ♂, viii ( MCZC) ; Santa Cruz Co., Nogales , 1 ♂, 13.vii.1949, Wilson & Kaiser ( USNM) ; Texas: Jeff Davis Co., Fort Davis , 1 ♂, 29–30.vi.1986, Heffern, Huether, & Androw ( DHPC) ; Davis Mtns. , 4 ♂, 24.vi.1957, 21.vi.1949, Knull, D.J. & J.N. ( FMNH) ; 1 ♂, 25.vi.1999, Nelson, G.H. ( FSCA) ; Fort Davis Nat Park , 1 ♂, 4.vii.1969, Kendall, R.O. & C.A. ( TAMU) ; Presidio Co., Presidio , 1 ♂, 25.vi.1968, Hafernik, J.E. ( TAMU) ; 1 ♂ ( AMNH) .

Figures

FIGURE 1. Elytroleptus luteus, a) head, anterior view, b) head, lateral view, c) antenna, d) right mandible, ventral view, e) labrum, f) right mandible, dorsal view, g) labium, dorsal view, h) left maxilla, ventral view, i) left maxilla, dorsal view, j) labium, ventral view. Scale bars = 1.0 mm for a, b, and c. Scale bars = 0.25 mm for d, e, f, g, h, i, and j.

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.