Hypogena dejeani ( Champion, 1886 )

Grey, Luna & Smith, Aaron D., 2020, A matrix-based revision of the genus Hypogena Dejean, 1834 (Coleoptera Tenebrionidae), Zootaxa 4780 (2), pp. 201-258 : 234-235

Hypogena dejeani ( Champion, 1886)

( Figs 23 , 24)

Ulosonia dejeani Champion, 1886: 165 .

Type Material: LECTOTYPE (male) labeled: “Las Mercedes, / 3000 ft. / Champion”; (b) “Ulosonia ♂ / dejeani Ch. ”; (c) on blue paper “Tenebrionid Base / Aaron D. Smith / Catalog # 19606”; (d) “ LECTOTYPE / Hypogena / dejeani / Grey & Smith, 2020” ( BMNH). Designated here. (See Fig. 23 ). Champion did not designate a holotype for this species. In order to maintain the taxonomic concept for this species a lectotype is designated herein from Champion’s syntype series.

Additional material examined: (5 males, 1 female): COSTA RICA: Puntarenas: 1 female. TB# 20204 (unknown) . MEXICO: 1 male. TB# 20201 ( NMNH) . MEXICO: Veracruz: 1 male. TB# 20202 ( NHMB) . country not specified: 2 males. TB# 19607, 20208 ( BMNH) .

Diagnosis: The male of this species has distinctive armature. The clypeal horn for this species is long and wide at the base, becoming thinner until the anterior third, where it becomes wider. The end of the horn is emarginate. The supraorbital horns are also long, and produced perpendicular to the head. The horns then curve forward to point anteriorly. The punctures are of one size with no coarse punctures present. This species is very similar to H. cat but can be differentiated by the lack of coarse punctures. There are very few female specimens, but most characters are similar to those in the male except the presence of the horns ( Fig. 23 ).

Redescription: Male. Size: 7—9 mm; 2—3 mm.

Head. Clypeal horn long (4:1; 5:1); thinner in middle and widening apically; apex truncated and emarginated (6:1); horn flattened; twice as thick at base than one supraorbital horn (7:2); projected forward (8:0); not punctate (9:0). Supraorbital horns long (10:1; 11:1); bent inwards toward each other (12:2); produced perpendicularly to head (13:1); strongly bent to point anteriorly (14:1); not punctate (15:0). Antennae with stellate sensoria (22:0). Third antennomere less than 1.5 times longer than fourth and more than 1.5 times length of second (18:1; 19:2). Vertex and frons almost smooth (26:0; 28:0). Gena not extending laterally past eye (36:0). Anterior margin of clypeus not forming circular arch (29:2). Mentum trapezoidal, punctate (40:0; 42:1); not pubescent (41:0). Groove on mandible present, continuing to connection point to cranium (44:1). Labrum fully setose (39:1).

Thorax. Pronotal punctures of one sizes (54:0); coarse punctures not present (56:0). From lateral view, pronotum not arched (58:0). Lateral margins of pronotum subparallel (61:1). Margins of pronotum narrowly expanded, by less than twice the diameter of fine punctures (62:1). Anterior margin of pronotum reaching middle of eye but not past eye (63:1). Hypomeron rugulose and finely punctate (75:2). Prosternum finely punctate (67:1); punctures separated by less than one diameter (68:1). Prosternal process not continuing past posterior margin of pronotum (69:0). Mesepisternum with punctures smaller than eye facets and separated by less than one diameter (71:1). Row of cuticular teeth present on posterior edge of metasternum (77:1). Elytra striate and punctate (46:1; 47:1)); punctures separated by less than one diameter (48:0). Elytral interstices flat to weakly convex (49:0); punctate; punctures larger than one fourth strial puncture size and separated by more than one diameter (50:0).

Legs. Tarsi pubescent. Cuticular outgrowths present on proximal two protarsomeres (86:1). Two apical spurs present on tibiae (85:1). protibia more than seven socketed spines present on distal third (81:1; 82:0). Spines present along entire medial marginal edge of protibial (83:1). Apex of tibiae bearing brush of setae (84:1).

Abdomen. First two visible abdominal segments laterally rugulose (89:1; 90:1). Third visible abdominal sternites laterally rugulose on anterior fourth (91:2). All abdominal segments glabrous and punctate; first three coarsely punctate and remaining two finely punctate.

Female. Similar to male, except as follows: Intraocular space raised and extending transversely inwards to meet in middle of head (23:2). Intraocular space impinging on eye (24:1). Vertex and frons with puncturing smaller than eye facets (25:1; 27:1). Clypeus with punctures smaller than eye facets and spread evenly across clypeus (31:1; 32:2). Anterior margin of clypeus flat, but with rounded corners (30:1). Clypeus not distinctly elevated (33:0).

Distribution ( Fig. 24): Mexico (Veracruz), Costa Rica (Puntarenas).

Figures

FIGURE 23: Hypogena dejeani, Lectotype, male. Dorsal view, lateral view, and labels.