Acrepidopterum fuscum Lingafelter, 2024

Acrepidopterum fuscum Lingafelter , new species

( Fig. 24 View Figure 24–25 )

Diagnosis. This species is similar to A. giesberti Lingafelter , new species, in that the elytra lack erect setae. It differs in having the third antennomere subequal in length to the scape and the elytra and pronotum are covered in mostly light and dark brown, appressed setae. Antennomere 4 has double or triple pale annulations (at the base, proximal to the middle, and sometimes distal to the middle). The pronotum and elytra have regularly spaced, deep, ovoid, singly-setigerous punctures.

Description. Holotype male. 3.6 mm long; 1.3 mm wide at humeri. Paratype (female): 3.7 mm long; 1.3 mm wide at humeri. Color: Integument of head, pronotum, elytra, and venter dark brown and completely covered with vestiture of mottled light brown, dark brown, and white, appressed pubescence. Elytra with diffuse, white pubescence at apical third, mottled alternating white and dark brown pubescent patches along suture, and darker brown periscutellar region around a dull white scutellum. Pronotum and head darker brown than elytra; pronotum with small, white pubescent patches along posterior margin.

Head. Broad, not protuberant, flat anteriorly, with weakly elevated and widely separated antennal tubercles. Head (including antennal tubercles) impunctate, covered with short vestiture of light brown, dark brown, and white pubescence.Eyes small, with lower lobe occupying less than half the height of head below the antennal tubercle; with large, coarse ommatidia. Upper eye lobes connected to lower lobe by two ommatidia. Upper eye lobes separated by almost 1.5 × basal width of scape. Antennae extending beyond elytral apices by two antennomeres. Antennomeres filiform, unexpanded at apices, and covered with vestiture of mostly dark brown pubescence. Antennomeres 3–11 with narrow, pale-yellow annulations at base and antennomere 4 with additional narrow yellow annulation proximal and distal to middle. Antennomeres with sparse, elongate setae ventrally. Scape extending to between basal fourth and third of pronotum, slightly longer than antennomere 3; Antennomere 4 longest, about 1.75 × longer than scape and antennomere 3, each; 5–11 successively shorter.

Thorax. Pronotum slightly broader than long; broadly rounded at middle; lacking lateral or dorsal tubercles. Evenly spaced, well-defined ovoid, singly-setigerous punctures present. Prosternal process nearly half as broad as procoxal width between procoxae with apex expanded to over two-thirds coxal width, closing procoxal cavities posteriorly. Lateral thoracic sclerites with large, ovoid punctures; venter otherwise impunctate. Elytra elevated at base behind scutellum, depressed at basal third, and gradually elevated at apical two-thirds; covered with evenly spaced, large, ovoid, singly-setigerous punctures. Erect setae absent. Elytral apices narrowly tapering, subtruncate. Scutellum narrowly rounded posteriorly. Femora clavate, short; hind femur extending to third abdominal ventrite. Femora dark brown with pale yellow at extreme base and apex. Tibiae dark brown with diffuse, pale yellow annuli at middle and apex. Mesocoxae separated by broad mesosternal process that is greater than half the width of mesocoxa.

Abdomen. With vestiture of dense, appressed, golden-brown setae; impunctate. First ventrite longer than ventrites 2–4 combined. Apex of ventrite 5 subtruncate.

Type material. Holotype (male): DOMINICAN REPUBLIC: Barahona Province, El Cachote , 18°03.295′N, 71°09.778′W, 970 m, 14 July 2006, S. W. Lingafelter, beating ( USNM) GoogleMaps . Paratype, female (same data) ( USNM).

Etymology. This species epithet refers to the dark brown pubescence over most of the integument.

Remarks. Only two specimens of this endemic Hispaniolan species are known, both collected at the same time by beating vegetation on the Barahona Peninsula of the Dominican Republic.