Aulacothorax exilis Boheman, 1858

Bezděk, Jan & Konstantinov, Alexander S., 2017, FOrgotten Aulacothorax Boheman, 1858, a Senior Synonym of Orthaltica Crotch, 1873 (Coleoptera: Chrysomelidae: Galerucinae: Alticini), The Coleopterists Bulletin 71 (4), pp. 791-795 : 792

Aulacothorax exilis Boheman, 1858 ( Figs. 1–4 )

Type Material. Holotype: ♀, “Taiti. [= Tahiti] [white label, printed] // Kinb. [= Kinberg (collector), white label, printed] // Aulacothorax exilis Bhn. [white label, Boheman’ s handwriting]”, (deposited in Naturhistoriska Riksmuseet , Stockholm).

Redescription. Body length 1.52 mm, width 0.67 mm. Body pale brown with antennae and legs paler. Head: Vertex with 10 long setae (5 on each side) including 4 setae situated along orbital sulcus. Supracallinal sulci straight, forming acute angle with each other. Supraorbital sulcus short, shallow. Orbital sulcus long, deep. Suprafrontal sulcus poorly developed, appearing as frontal ridge merging with antennal calli. Antennal calli narrow, separated by sharp midfrontal sulcus, without setiferous pores. Frontal ridge parallel-sided, narrow, reaching anterofrontal ridge. Anterofrontal ridge slightly wider than frontal ridge, evenly high, sloping abruptly towards clypeus. Labrum as wide as space between outer edges of eyes. Setiferous pores on dorsal surface of labrum small, not possible to count. Relative proportions of antennomeres as follows: 13:13:7:8:10:8:10:10:10:10:15. Pronotum: Widening anteriorly, widest slightly anterior to middle, 1.35X as wide as long. Sides slightly uneven with small denticles bearing long setae. Antebasal transverse impression well-developed. Pronotal surface densely covered with large punctures, their diameter about as large as distance between punctures. Elytra: Sparsely and unevenly pubescent, with setae visible along lateral margin. Elytral punctures arranged in striae placed in shallow grooves. Stria 7 incomplete, not reaching elytral base. Humeral calli well-developed. Legs: Pro- and mesotibiae lacking spurs. Claw appendiculate.

Figures

Figs. 1–4. Aulacothorax exilis. 1) Dorsal habitus; 2) Lateral habitus; 3) Head, frontal view; 4) Original illustration (Boheman 1858, plate I, fig. 1).