Enoclerus albidulus Rifkind

Rifkind, Jacques, 2012, New Central American and Mexican Enoclerus Gahan (Coleoptera: Cleridae: Clerinae): Part II, Zootaxa 3397, pp. 1-27 : 19

Enoclerus albidulus Rifkind , n. sp.

( Fig. 20 )

Type specimens. Holotype male: México, Puebla St[ate], Rt. 150, ca. 3.2 km E Santa Ana, 15 Oct, 1989, R. S. Zack collector. Holotype deposited in WSUC. Paratype: same data as holotype, deposited in JNRC.

Diagnosis. No other Enoclerus species combines small size (<4.0 mm) with shining, sparsely setose, concolorously pale elytra.

Description (Holotype). Length: 3.68 mm. Color: "Olympic" white; frons, cranium, antennae, mouthparts, prosternum, abdomen, legs, scutellum and 3 maculae on pronotum (a small diamond shaped spot at posterior middle before basal collar; 2 larger, irregular longitudinal markings arranged bilaterally on disk posterior to transverse impression), reddish–testaceous; vertex darkening to brown at middle; pronotal lateral margins with a dark brown line that is prolonged dorsally at the pronotal anterior margin and extends a finger dorsally at about the middle of the pronotum; mesosternum (medially), metasternum and metepisterna also dark brown. Head: antennae moderate in length; antennomeres 6–8 subserrate, gradually enlarged distally; club expansion relatively unabrupt; front bi–impressed; eyes rather small; ocular notch short, rectangulate; surface shining, moderately densely punctate, obscurely rugulose, very sparsely setose. Pronotum: broader than long (ratio of width to length approximately 9:8), narrower than elytra at base; transverse impression broadly U–shaped at middle; lateral foveae distinct; anterior and posterior margins subtruncate; disk subflattened; collar narrow; surface shining, rather coarsely and irregularly punctate (punctures shallower and nearly obsolete at middle of disk), very sparsely setose. Elytra: elongate (ratio of length to width 11:6), widest posterior to middle; humeri pronounced, gibbus , forming angles that are distinctly anterior to basal margin of scutellum; sides subparallel, slightly constricted posterior to humeri; slightly expanded behind middle; broadly, arcuately convergent to relatively narrow, separately rounded, dehiscent apices; subbasal swellings shallow, indistinct; surface shining, shallowly, irregularly dimpled, set with fine punctures (contrasting as dark points against white integument) arranged irregularly or subserially, except for a single longitudinal row running the length of each elytron at the sutural bead, and another row of dark punctures along the sides at the epipleural fold; vestiture rather sparse, inconspicuous, consisting of pale, short, mostly reclinate setae. Mesosternum: posterior median process not strongly elevated. Metasternum: shining, rather coarsely, irregularly punctate; sparsely setose; anterior median process not elevated. Abdomen: visible sternite 5 with hind margin feebly emarginate; sixth visible sternite small, with hind angles rounded, hind margin apparently subtruncate. Legs: rather robust; all tarsi with well developed basal claws.

Variation. The single paratype specimen, also a male, measures 3.80 mm.

Etymology. The specific name refers to the new species' distinctive whitish elytra.

Distribution. Known only from the type locality.

Figures

FIGURES 19 – 22. Habitus of: 19. Enoclerus silbermannii aeternitatis Rifkind, n. subsp. (holotype male). 20. Enoclerus albidulus Rifkind n. sp. (holotype male). 21. Enoclerus mcnallyi Rifkind n. sp., detail of anterior elytral markings. 22. Enoclerus toledoi Rifkind n. sp., lateral view of pronotum showing distinctive markings.