Crioprosopus baldwini Eya, 2020

Eya, Bryan K., 2020, A new species of Crioprosopus Audinet-Serville, 1834 from Costa Rica and Panama (Coleoptera: Cerambycidae: Cerambycinae: Trachyderini), Insecta Mundi 760, pp. 1-8 : 2-3

Crioprosopus baldwini Eya , sp. nov.

( Fig. 6–10 )

Description. Female: Length, 31–32 mm. Form large, parallel-sided, ventral surface pubescent; integument shining, antennae, head, mandibles, legs, and sternum dark brownish to black; pronotum glabrate (i.e., almost glabrous or subglabrous), shiny, yellowish, disc narrowly black on anterior mar- gin with five black macula, three arranged in triangle, two antemedial, and one postmedial, and two smaller ones on anterior angles; scutellum black; elytra straw-yellow, humeral angles, basal margin, and around scutellum black, middle with black corrugated transverse band; apices with black, irregu- lar macula, occupying the entire width; pubescence sparse on dorsum, sternum densely covered with whitish pubescence. Head small, front short, deeply impressed transversely with a pit on each side of the transverse impression; median line extending onto vertex between eyes, vertex glabrate, sparely punctate; mandibles arcuate, acute at apices; apical segments of labial and maxillary palpi subtruncate at apex, integument impressed dorsally; genae quadrate, lower lobe of eye well separated from base of mandible, surface shining, sparsely punctate, very sparsely covered with short, appressed, whitish pubescence; antennal tubercles broad, level with vertex, apices rounded; eyes moderately large, finely faceted, upper lobes small, well separated; antennae slender with eleven antennomeres, shorter than body, extending to apical third of elytra, scape conical, canaliculate (or carinate) on basal-half, finely, sparsely punctate; basal antennomeres with a few short, erect hairs beneath, sparser dorsally, apices of antennomeres III and IV slightly enlarged, apices of V to XI expanded externally, antennomere III with dorsum slightly flattened, and antennomeres laterally carinate from apex of III to XI; antennomeres from IV densely clothed with very short, appressed, pale pubescence; antennomere III subequal to I, IV shorter than III; each antennomere from V to VII subequal and longer than IV, VIII to X gradually shorter than VII, XI subequal to IV, appendiculate at apical third. Pronotum broader than long (1.5 times as broad as long), posterior margin impressed, sides with small tubercles in middle; disc glabrate, rather coarsely, sparsely, irregularly punctate; sides glabrate, sparsely punctate, pubescence sparse, pale, long and erect; prosternum concavely declivous anteriorly, sparsely, punctate, clothed with erect pale hair; prosternal intercoxal process narrower than coxal cavities, arcuate at apex, coxal cavities wide open behind; mesosternum without obvious projection, concavely declivous anteriorly, sides very finely clothed with short, silvery pubescence; mesosternal intercoxal process narrower than coxal cavities, flat, level with top of coxae; metasternum with appressed pale pubescence, middle glabrate with a few scattered erect hairs; metepisternum broad, tapered posteriorly, very minutely, densely punctate, interspersed sparsely with larger, fine punctures, pubescence short, appressed, dense. Scutellum triangular, acutely pointed apically. Elytra about 2.1 times longer than broad, distinctly marginated laterally, disc smooth, finely, sparsely punctate at base, punctures dense, coarse, and deeper in middle, becoming finer and confluent near apex, pubescence nearly obsolete except at apices with short, erect golden hairs; apices rounded and obliquely subtruncate, unarmed, sutural angles angulate. Legs slender, hind femora linear, shorter than body, deeply, sparsely punctate, and with short, suberect hairs on dorsal and ventral surface; tibiae slender, apically with two short spines, internally with a row of short, suberect hairs; hind tarsi slender, first segment about as long as following two segments together, third segment cleft to base. Abdomen glabrous, clothed sparsely with long, suberect, golden hairs intermixed sparsely with short pubescence in middle, segments near apices and sides densely clothed with pale, whitish, appressed hair; fifth sternite broadly subtruncate at apex.

Male. Unknown.

Etymology. This elegant species is named for Mr. Brian B. Baldwin of Boquete, Panama, who collected two of three known specimens.

Distribution. Costa Rica and Panama.

Type material. Holotype, female, COSTA RICA: Puntarenas, 3 Sept. 1968, P.A. Ramos ( EMEC) deposited in EMEC. Additional two paratypes from PANAMA: Chiriquí: Boquete, Volcancito Rd. , 1 May 2018, on patio of B.B. Baldwin, 1301 m, N 8°46 ′ 30.6″, W82°26 ′ 52.1″, B.B. Baldwin (1 female, DJHC), 20 May 2018, on house, B.B. Baldwin (1 female, CMNH).

Discussion. Crioprosopus baldwini sp. nov. is closely related to Crioprosopus servillei Audinet-Serville, 1834 ( Fig. 11–12 ). Examination of C. baldwini reveals that this species is distinct from C. servillei based on the following characteristics: 1) vertex that is flatter and not bicarinate as in C. servillei ( Fig. 13–14 ) due to the median line on frons that does not extend to the top of vertex ( Fig. 15 ); 2) less protuberant lateral tubercles on pronotum, pronotal disc appears more elongate, width 1.5 times length ( Fig. 15 ), versus C. servillei with acute lateral spine and width of the disc about 1.6–1.8 times length ( Fig. 13–14 ); 3) punctures on the pronotal disc that are coarser ( Fig. 15 ); and 4) elytral discs that are rugulose due to denser, deeper, and coarser punctures, especially in the middle of disc, which becomes finer and more confluent toward apices ( Fig. 18 ). The pronotal disc of C. servillei is glabrous, and punctures, if present, are much finer ( Fig. 13–14 ), and the elytral discs are smooth, more finely, shallowly punctate, and with punctures becoming finer and denser towards the middle and obsolete towards the apex ( Fig. 16–17 ). The anterior margin of the pronotum of C. baldwini is narrowly black with five black maculae, three larger spots arranged in a triangle, two antemedial on either side of middle, one postmedial in middle, and two smaller spots on the anterior angles ( Fig. 15 ). The large spots on the anterior half merge with the narrow black band on the anterior margin in the two examples from Panama. The posterior margins of the pronotal discs are yellow in C. baldwini , while the specimens of C. servillei examined so far from Mexico and Honduras have posterior margins that are narrowly black. The black corrugated stripe in the middle of each elytron of C. baldwini is transverse but narrower at the sutural margin ( Fig. 18 ) while in C. servillei the black corrugated band in the middle is oblique and widens at the epipleural margin ( Fig. 16–17 ). Crioprosopus baldwini is one of the three Crioprosopus species, which include C. amoenus Jordan, 1895 and C. chiriquiensis Eya, 2015 , described exclusively from female specimens; therefore, at this time these three species are retained in this genus until males are captured and the pronotal characteristics are examined.

Crioprosopus baldwini is distributed from Puntarenas Prov., Costa Rica to Boquete, Chiriquí Prov., Panama, while Crioprosopus servillei occurs further to the north, from Honduras to Mexico. Relatively few specimens of C. servillei have been examined, so far; therefore, the exact range of this species is unclear. However, since most of C. servillei specimens examined are from southern Honduras, from the vicinity of Tegucigalpa, the species is also probably found in northern Nicaragua. A photograph of a female specimen that appears to be C. servillei is available online ( Bezark 2020 id #48426, identified as C. servillei ) with the following collection information: Nicaragua, Ocotal, Cordillera de Dipilto, N. Monzonte, 20-X-2003, E. van den Berghe. The locality is approximately 16 km south of the border of Honduras. The distribution of C. saundersii White, 1853 is listed as Mexico, Honduras, and Nicaragua; however, other than the photograph of the holotype from Mexico ( Bezark 2020 id: #15906), I have not seen any specimen that is as dark in coloration as this holotype from other countries, such as Honduras and Nicaragua. A male and female pair of C. servillei found in the USNM collection were mistakenly labeled as C. saundersii and may be a source for confusion in distribution of this species.

Figures

Figures 1–9. Characteristics of the head of Crioprosopus, and dorsal and lateral view of Crioprosopus baldwini, sp. nov. 1–3) C. baldwini, paratype, Boquete, Panama showing characters of the head of Crioprosopus as described by Linsley (1962), i.e., “front large, perpendicular, abruptly separated from anteocular space.” 1) Gena large, quadrate well separated from lower eye lobe. 2: 2a) Apex of mandibles acute, simple; 2b) Dorsal anterior margins of genae ridged. 3: 3a) Front perpendicular to vertex and recessed or indented between the “anteocular space” (i.e., between the dorsal anterior margin of gena) so the front is “pushed back in towards the eye.” 4: 4a) Prosternum with intercoxal process arcuate at apex. 5) Elytra distinctly marginated laterally. 6–7) Dorsal and lateral view of C. baldwini, holotype, female, Puntarenas, Costa Rica. 8–9) Dorsal and lateral view of C. baldwini, paratype, female, Boquete, Chiriquí Prov., Panama.

Figures 10–18. Comparison of characteristics of C. baldwini and C. servillei. 10) Live specimen of C. baldwini, paratype, 32 mm, provided courtesy of Mr. Brian Baldwin. 11) C. servillei, female, holotype, Interior Mexico, 38 mm. 12) C. servillei, female, El Zamorano, Honduras, 39 mm. 13–14) C. servillei with broader pronotum, acute lateral spines, and glabrous disc; 14a) Vertex bicarinate. 15) C. baldwini, paratype with elongated pronotum, less protuberant lateral tubercles, and coarsely, sparsely punctate disc; 15a) Vertex flattened, median line of frons not extended deeply to top of vertex. 16–17) C. servillei elytral discs smooth, finely, shallowly punctate. 18) C. baldwini elytral disc rugulose with denser, deeper and coarser punctures.