Calliclytus macoris Lingafelter

Lingafelter, Steven W., 2011, New myrmecomorphous longhorned beetles from Haiti and the Dominican Republic with a key to Anaglyptini and Tillomorphini of Hispaniola (Coleoptera, Cerambycidae, Cerambycinae), ZooKeys 106, pp. 55-75 : 61-63

Calliclytus macoris Lingafelter sp. n. Fig. 3Map 1

Diagnosis.

This species is very similar to the Cuban Calliclytus schwarzi Fisher with regard to proportions, shapes of anatomical structures, position of the antemedial, raised, ivory callus of the elytron, and hypothesized presence of only 10 antennomeres (the holotype of Calliclytus schwarzi is missing the terminal segment of both antennae; however, since the antennal proportions are similar to those of Calliclytus macoris , it presumably has only 10 antennomeres). Calliclytus macoris differs from Calliclytus schwarzi in having an alveolate-punctate pronotum (rugose in Calliclytus schwarzi ), a diamond shaped, pale macula at suture near elytral apex (elytral apex all black in Calliclytus schwarzi ), and a densely pubescent scutellum (glabrous in Calliclytus schwarzi ).

Calliclytus macoris is also similar to the Puerto Rican Lamproclytus elegans Fisher with regard to proportions and shapes of the major anatomical structures but differs in having the raised eburneous ridge of the elytron antemedially located (postmedially positioned in Licracantha elegans ), the diamond shaped, pale macula at the elytral apex (uniformly dark in Licracantha elegans ), and uniformly dark legs (femora pale at the base and dark at the apex in Licracantha elegans ).

Description.

Female. 4.85 mm long; 1.26 mm wide at humeri. Color: Dorsal integument of head, pronotum, and legs dark reddish brown to black; elytral color dark reddish brown to black on periscutellar region and most of the apical two-thirds with the exception of orange, diamond shaped macula at apex and raised, transverse ivory callus antemedially; ventral color mostly dark reddish brown to black except for orange head. Head: Shiny, rugose-punctate throughout; moderately dense, long and short erect and suberect, yellow-translucent setae; frons and gena short, broad, without acute projection near base of mandible; with poorly defined frontal-genal ridge; without anteclypeal sulcus; without interantennal groove or depression; eye divided into two lobes connected by row of 5 facets, with large lobe anteroventral positioned to antennal tubercle and small lobe present posterodorsal to antennal tubercle; laterally not as protuberant as pronotum; finely faceted; antennal tubercle weakly elevated; antenna 10-segmented, without spines, short, extending to just beyond base of elytron; scape short, thickened at middle, extending just past anterior margin of pronotum; antennomere 2 short, but over half length of antennomere 3; antennomeres 2-5 successively increasing in length, 6-10 successively shorter, produced apicolaterally; scape through antennomere 5 pale orange; 6-10 piceous to black; antennomeres 1-5 with sparse, elongate, golden setae; 6-10 with denser, appressed golden setae along with sparse, erect setae. Mandible short, retracted, yellow with piceous apex; terminal palpomeres not broadly dilated. Pronotum: Semiglossy, with uniform alveolate punctation dorsally, becoming punctate at sides; without calli or tubercles; slightly longer than broad, 1.47 mm long, 1.27 mm wide (length/width = 1.16); evenly widened at middle; gradually rounded laterally and dorsally; base with constriction; distinctly narrower than elytra; sparsely but conspicuously pubescent with scattered, long, erect yellowish setae combined with shorter, appressed yellow setae. Prosternum: Glossy, with dense microsculpture and short, white, setae in front of procoxae; prosternal process narrow between procoxae; apex broadly expanded behind, closing procoxal cavities posteriorly. Elytron: Glossy; deeply, separately punctate throughout, becoming slightly more dense posteriorly; sparse but conspicous, erect, yellow setae throughout; dark reddish brown to black on periscutellar region and most of the apical two-thirds with exception of orange, diamond shaped macula at apex; transverse, raised, eburneous callus present, not extending to suture; weakly gibbous at periscutellar region only; elytral apex rounded to suture; 2.96 mm long, 0.62 mm wide (length/width = 4.77). Scutellum: Elongate, subtruncate at posterior apex; densely coated with appressed, short, yellowish setae. Legs: Femora short, stout, with strongly clavate apices on abruptly narrowed peduncles; metafemur not attaining elytral apex; tibiae straight, not expanded apically, each with two straight tibial spines; tibiae and femora sparsely but conspicuously pubescent with long, erect, white setae. Venter: Glossy; sparsely pubescent throughout with erect, long, white setae and dense, short, white setae on metasternum posterior and lateral margin, mesosternum, and prosternum; integument darker than most of dorsum; mesosternal intercoxal process about 2.2 times as broad as prosternal process, without lateral projection into mesocoxa. Ventrite 1 most elongate; remaining ventrites much shorter and subequal in length; apex of fifth ventrite broadly rounded, without notch, sulcus, or other modification.

Etymology.

The specific epithet is based on the nearby Macorís River where this species was discovered by Edmund Giesbert.

Type material.

Holotype, female: Dominican Republic, San Pedro de Macorís Prov., 12 km W San Pedro de Macorís, May 5-19, 1985, E. Giesbert, collector (EFGC in FSCA).

Remarks.

The genera Lamproclytus and Calliclytus were not specifically compared to each other in Fisher’s (1932) descriptions, despite their obvious similarities in nearly every feature. Careful phylogenetic work in Tillomorphini may suggest that synonymy of these genera is necessary, but that is beyond the scope of this work. Given that the position of the eburneous elytral ridge of Calliclytus macoris is closest to that of Calliclytus schwarzi , it is placed in that genus as opposed to Lamproclytus . Note that Monné (2005) and Monné and Bezark (2010) erroneously listed Lamproclytus elegans Fisher from the Dominican Republic, but that species does not occur in Hispaniola.

This new species is superficially similar to ants of the genus Leptothorax Mayr, which may serve as the mimicry model. In Puerto Rico, the similarly colored cerambycid, Boricyrtinus nilseni Micheli, was collected with Leptothorax isabellae (Wheeler) ( Micheli 2003). There are seven species of these ants known from Hispaniola (Perez 2008).