Seticeros, Perger & Santos-Silva, 2010

Perger, Robert & Santos-Silva, Antonio, 2010, A new genus and species of Callipogonini, description of the male of Strongylaspis boliviana Monne & Santos-Silva, 2003, and a new distributional record for Chorenta reticulata (Coleoptera, Cerambycidae), ZooKeys 48 (48), pp. 29-38 : 30-32

Seticeros gen. n.

urn:lsid:zoobank.org:act:40B98954-E133-4084-8A1B-F7B5510DC740

Etymology. The name refers to the hairs/bristles (setae) on the ventral surface of the antennae (ceros, Greek for horn). Masculine gender.

Type species. Anacanthus aquilus Thomson, 1865: 577 .

Size moderately large (21–47.4 mm). Integument brown to dark-brown, lighter on elytra and parts of ventral surface.

Male. Body weakly depressed; head (without mandibles) + prothorax smaller than 2.0 times to almost 2.5 times of the elytral length. Head (Figs 1, 3, 6, 8) proportionally large and wide; punctation of dorsal surface (Figs 6, 8) consistently coarse and deep or confluent. Eyes large; upper ocular lobe slightly narrower than lower ocular lobe; distance between upper ocular lobes (Figs 1, 3) little larger than 2.0 times the width of antennomere III at basal third; distance between lower ocular lobes (Figs 6, 8) equal to approximately 1.5 times distance between posterior tentorial pits. Ocular carina (Figs 1, 2, 3) indistinct or absent. Clypeus wide, strongly depressed centrally, and strongly oblique towards labrum. Labrum horizontal, narrow, concave frontally, and distinctly lower than base of clypeus. Hypostomal area sculptured; pilosity moderately long, sparse; hypostomal carina narrow and slightly distinct. Galea surpassing base of second segment of maxillary palps. Mandibles (Figs 1, 2, 3, 6, 8) longer or approximately as long as half of length of head; inner surface with sparse hairs; lowerinner margin with single, somewhat rounded and wide tooth, near inner apical tooth. Antennae (Figs 1, 2) reach apical fourth of elytra; scape reaching or just surpassing posterior edge of eye; ventral surface of antennal segments (Fig. 2) with somewhat long and abundant hairs, gradually shorter and sparser towards segment XI.

Prothorax transverse; anterior angles rounded or somewhat angulated, not projected forward; lateral angles rounded and indistinct, or with obtuse angled lateral edge; posterior angles well marked, angulate. Pronotal disc (Figs 1, 3) with impunctate and shining protuberances on central area, distinctly punctate towards base and apex, and coarsely, confluently punctate laterally (somewhat rugose); lateral margins serrate in upper 1/3 to 2/3, from distinctly rounded to distinctly convergent apically. Prosternum elevated centrally, glabrous and smooth on this area, coarsely punctate and with or without some hairs laterally. Prosternal process wide, with lateral margins parallel, and apex protruding beyond procoxae. Elytra glabrous, abundantly punctate, with three ridges distinct; apex with spine (sometimes moderately long or slightly distinct). Procoxal cavities widely opened behind. Metepisterna and metasternum with pilosity moderately long and very abundant. Metepisterna wide at base and distinctly narrowed towards apex. Profemura rugose. Tibiae slightly enlarged towards apex, with sides subparallel; protibia shorter and proportionally thicker than others. Tarsomere V in all tarsi shorter than tarsomeres I-II together or, at most, as long as in protarsi.

Female. Eyes proportionally larger than in male. Distance between upper ocular lobes (Figs 4, 5) from as wide as the width of a lobe, to approximately equal, to 1.5 times the width; distance between lower ocular lobes (Figs 7, 9) as in male. Antennae (Fig. 4) from just surpassing the middle of elytra to reaching the posterior third; pilosity of segments less conspicuous than in male. Hypostomal area (Figs 7, 9) glabrous or nearly so. Lateral and posterior angles of pronotum distinct, frequently with lateral or lateral and posterior spine.

Included species: Seticeros aquilus (Thomson, 1865) new combination; Seticeros tunupai sp. n.

Material examined: Seticeros aquilus : COLOMBIA, Cundinamarca: Fusagasuga, 1 ♁, 3 ♀, 1931, P. Apolinar col. ( MZSP). We also examined photos of the five syntypes of this species.

Geographical distribution: Colombia and Bolivia.

Comments. Seticeros gen. n. differs from Chorenta Gistel, 1848 as follows: ventral surface of antennal segments (Fig. 2) with somewhat long and abundant hairs, mainly in segments III-VI, more conspicuous in female; hypostomal area of male without abundant pilosity (Figs 6, 8), and in female more distinctly punctate (Figs 7, 9), metasternum and metepisternum with abundant pilosity. In Chorenta the antennal segments are glabrous in both sexes; the hypostomal area of the male (Figs 10, 12) has somewhat long and very abundant pilosity, in the female less punctate (Figs 11, 13) and the metasternum and metepisternum are glabrous.

It differs from Hephialtes Thomson, 1864 as follows: labrum narrow and placed distinctly lower than the base of clypeus; antennal segments, metasternum and metepisterna as described in the comparison with Chorenta ; protibia not distinctly enlarged towards apex; elytral carina very distinct. In Hephialtes the labrum is wide and coplanar with the clypeus, the antennal segments, metasternum, and metepisterna are glabrous, the protibia is distinctly enlarged towards apex, and the elytral carinae is not strongly marked.

From Stictosomus Audinet-Serville, 1832 it differs in the following characters: mandibles short in both sexes (approximately as long as the half of the head); antennal segments, metasternum and metepisterna as described in the comparison with Chorenta ; profemurs rugose; metatarsomere V at most as long as the metatarsomeres I-II together. In Stictosomus the mandibles are distinctly longer than the half of the length of head (mainly in the male), the antennal segments, metasternum, and metepisterna are glabrous, in the male the third antennal segment is about as large as antennal segments IV, V, and VI together; the profemurs are smooth, and tarsomere V in all tarsi is longer than I-II together.