Anelaphus rotundus, Vlasak & Santos-Silva, 2020

Vlasak, Josef & Santos-Silva, Antonio, 2020, New species of Cerambycinae and Lamiinae from Ecuador and Honduras, with transference of a species of Rhinotragini (Coleoptera, Cerambycidae), Zootaxa 4748 (3), pp. 455-470 : 458-461

Anelaphus rotundus sp. nov.

( Figs. 9–12 )

Description. Male. Integument mostly dark brown; mouthparts dark reddish brown, lighter toward apex of palpi; antennae dark reddish brown, gradually lighter toward distal segments; legs dark reddish brown with blackish areas interspersed; abdominal segments II–IV with narrow, transverse yellowish-brown band before apex.

Head. Frons coarsely, abundantly punctate; with pale-yellow pubescence not obliterating integument, especially close to clypeus, distinctly dense, yellower close to eyes; with a few long, erect pale-yellow setae laterally. Area between antennal tubercles with sculpturing as on frons; with pale-yellow pubescence partially obliterating integument, except glabrous central area. Area between upper eye lobes with punctures slightly finer, sparser than on area between antennal tubercles, except smooth central area; with pale-yellow pubescence not obliterating integument, following along anterior eye margin, fused with dense pubescence on frons, and dorsally slightly projected backward after eye margins, glabrous on smooth area; with a few long, erect pale-yellow setae close to eye. Remaining surface of vertex slightly depressed, coarsely, densely rugose-punctate, except nearly smooth central region; with sparse, short pale-yellow pubescence laterally, glabrous centrally. Area behind upper eye lobes finely, densely rugose-punctate, except smooth area close to eye, narrow superiorly, distinctly widened toward lower eye lobe; with sparse pale-yellow pubescence on punctate area. Area behind lower eye lobes smooth, glabrous superiorly on wide area close to eye, moderately coarsely, abundantly punctate, with pale-yellow pubescence inferiorly on wide area close to eye (pubescent area gradually widened toward inferior surface of eye), moderately coarsely striate-punctate, glabrous on remaining surface. Antennal tubercles coarsely, abundantly punctate except smooth apex; with longitudinal dense pale-yellow pubescent band centrally, glabrous on smooth area. Genae finely, moderately sparsely punctate; with pale-yellow pubescence not obscuring integument frontally, gradually denser toward inferior area close to eye, with long, erect setae of same color interspersed (pubescence fused with that behind eye lobe). Gulamentum smooth, glabrous posteriorly, depressed, coarsely rugose-punctate, with erect yellowish-brown setae on area between eye lobes. Postclypeus moderately finely, abundantly punctate; with bristly yellowish-white pubescence not obliterating integument on wide central area, glabrous laterally; with one long, erect yellowish-brown seta on each side of wide central area. Labrum nearly glabrous posteriorly, with long, abundant golden setae directed forward anteriorly. Anterior and posterior margins of upper eye lobes parallel-sided; distance between upper eye lobes 0.44 times length of scape (0.26 times distance between outer margins of eyes); in frontal view, distance between lower eye lobes 0.80 times length of scape (0.48 times distance between outer margins of eyes). Antennae 1.8 times elytral length, reaching elytral apex near apex antennomere IX. Scape moderately finely, abundantly punctate; with paleyellow pubescence (whiter toward apex, especially depending on light intensity), obscuring integument dorsally and on outer surface, especially on basal third, glabrous on central apex of dorsal surface, sparse ventrally and on inner surface; with a few long, erect setae near apex of dorsal and ventral surface (longer dorsally). Pedicel and antennomeres with yellowish-white pubescence not obliterating integument, distinctly shorter from VI; antennomeres III–IV with short, erect, moderately abundant yellowish setae ventrally; antennomeres V–X deeply excavated and flattened externally; antennomere III with distinctly, triangular spine at inner apex; antennomere IV with short triangular spine at inner apex; antennomere V with minute spine at inner apex (almost indistinct); remaining antennomeres unarmed at inner apex; antennomeres III–IV with rounded outer apex; antennomeres V–X with triangularly projected. Antennal formula (ratio) based on length of antennomere III (excluding spine of antennomeres III and IV): scape = 1.02; pedicel = 0.22; IV = 0.87; V = 1.07; VI = 1.15; VII = 1.22; VIII = 1.12; IX = 1.10; X = 1.00; XI = 1.22.

Thorax. Prothorax slightly wider than long; sides rounded, slightly straighter on posterior half. Pronotum with anterolateral gibbosities nearly indistinct; with distinct smooth central area from posterior sixth to slightly after middle, then slightly carina-shaped toward anterior quarter; remaining surface finely, densely punctate except arched area on each side with punctures sparser and coarser, from anterior quarter to near apex, and nearly smooth anterior and posterior area close to margins; with six dense pale-yellow pubescent maculae, one subtriangular, placed centrally close to anterior margin, one subquadrate, placed centrally close to posterior margin, two subcircular, placed on each side of anterior half, almost on sides of prothorax, one on each side of anterior half (on area with coarser punctures), number one-shaped; remaining surface of area with coarser punctures with pale-yellow pubescence partially obliterating integument, and remaining surface of sparse pale-yellow pubescence, except glabrous smooth central area. Sides of prothorax finely, densely punctate, except striate anterior area (this area gradually widened toward prosternum); with pale-yellow pubescence not obliterating integument, sparser on striate anterior area. Prosternum sulcate along procoxal cavities; finely, abundantly punctate on posterior two-thirds, striate-punctate on anterior third, especially close to anterior margin; with yellowish-white pubescence not obliterating integu- ment, distinctly sparser on anterior third. Narrowest area of prosternal process about 0.25 times width of procoxal cavity. Ventral surface of meso- and metathorax with abundant yellowish-white pubescence partially obscuring integument, except glabrous central posterior two-thirds of metaventrite, and glabrous right triangle-shaped area on each side of posterior region of metaventrite; with long, erect yellowish-white setae interspersed on metaventrite. Scutellum with dense pale-yellow pubescence, lighter than pubescent maculae on pronotum, except glabrous central area, not reaching apex. Elytra. Coarsely, densely punctate on large triangular circum-scutellar area, coarsely, moderately abundantly punctate on sides of anterior third (punctures distinctly finer than on circum-scutellar area), gradually finer, sparser punctate toward apex; triangular circum-scutellar area with a few short, decumbent yellowish-white setae, remaining surface with irregular yellowish-white pubescent maculae (whiter depending on light intensity), gradually denser toward apex (almost entirely covering posterior third of elytra and humerus); with long, erect, moderately abundant yellowish-brown setae throughout, apex rounded together, unarmed. Legs. Profemora somewhat rugose ventrally, shorter and wider than meso- and metafemora; all femora with yellowish-white pubescence (yellower on some areas, especially depending on light intensity), partially obscuring integument, especially on metafemora. Tibiae with yellowish-white pubescence not obscuring integument, except yellowish-brown, bristly pubescence on ventral posterior half of protibiae, and ventral posterior quarter of meso- and metatibiae; with long, nearly decumbent yellowish-brown setae interspersed. Tarsi with sparse yellowish-white pubescence.

Abdomen. Ventrites with yellowish-white pubescence not obscuring integument, except glabrous apex of I–IV, with long, erect yellowish-brown setae interspersed. Apex of ventrite V almost rounded.

Dimensions in mm. Total length, 16.30; prothoracic length, 2.75; anterior prothoracic width, 2.25; posterior prothoracic width, 2.50; widest prothoracic width, 3.10; humeral width, 3.90; elytral length, 10.55.

Type material. Holotype male from HONDURAS, Francisco Morazán: Uyuca W Est. Biológica (reared: girdled Quercus twig), 1-10.VI.2018, J. Vlasak col. ( MZSP).

Etymology. The name refers to the rounded elytral apex.

Remarks. Anelaphus rotundus sp. nov. is similar to A. subinermis Linsley, 1957 , but differs as follows: antennomere IV with spine of inner apex short and triangular-shaped; antennomeres V and VI minutely projected at inner apex; pronotum with distinct and well-delimited smooth and glabrous central area; sutural apex of the elytra rounded. In A. subinermis , the spine of antennomere IV is longer and more distinctly spiniform, spine of antennomeres V and VI short, but distinct, pronotum with the smooth and glabrous central area ill-formed or absent, and sutural apex of the elytra with short projection. According to Linsley (1957), on the antennae in A. subinermis ( Figs. 13–16 ): “segments three to five distinctly and coarsely spinose at inner apex, sixth segment with a minute spine, seventh segment with inner angle acute, subspiniform.” Chemsak (1959) reported on the antennae in A. antennatus Chemsak, 1959 (see photograph of the holotype at Bezark 2019a): “segments three to eight spined at apices, spines decreasing in length from the third.” Hovore (1983) synonymized A. antennatus with A. subinermis , and stated that the relative development of the short spines at the apices of antennal segments six to eight is also coincidental to overall size of the specimen. Thus, it is possible to see that the spine at inner apex of the antennomere V is always present in A. subinermis , but absent in the new species, even with the size of the holotype (16.3 mm) similar to that in the types of this species and A. antennatus (17–18.5 mm). Anelaphus rotundus differs from A. inermis (Newman, 1840) (see photographs at Bezark 2019a) by more slender body (stouter in A. inermis ), and elytral apex rounded and unarmed (truncate and with short projection in A. inermis ). It differs from A. badius Chemsak, 1991 (see photograph at Bezark 2019a), by the distance between lower eye lobes distinctly shorter ventrally (distinctly wider in A. badius ); from A. debilis (LeConte, 1854) by the elytral apex rounded and unarmed (truncate and with short projection at sutural angle in A. debilis ); and from A. dentatus Chemsak, 1962 (see photograph at Bezark 2019a) by the sutural elytral apex unarmed (with distinct spine in A. dentatus ).

Figures

FIGURES 9–16. 9–12) Anelaphus rotundus, holotype male: 9) Dorsal habitus; 10) Ventral habitus; 11) Lateral habitus; 12) Frontal habitus. 13–16) Anelaphus subinermis, holotype male: 13) Dorsal habitus; 14) Lateral habitus; 15) Frontal habitus; 16) Labels. Figures 13–16 by Rachel Diaz-Bastin (CASC).