Acoptodera gen. n., 2024

Anichtchenko, Alexander, 2024, To the knowledge of the subtribe Pericalina Hope, 1838 (Coleoptera, Carabidae, Lebiinae), with description of new genus, new subgenus and species from Oriental region, Zootaxa 5453 (3), pp. 369-378 : 370

Acoptodera gen. n.

Type species: Coptodera piligera Chaudoir, 1883: 20 .

Diagnosis. The new genus is closely relative with five Oriental genera: Pericalus W.S. Macleay, 1825 ; Lioptera Chaudoir, 1869 ; Coptodera Dejean, 1825 ; Trichocoptodera Louwerens, 1958 and Gidda Andrewes, 1920 . These genera belong to the Pericalus genus-group ( Shpeley & Ball 2000), or subtribe Coptoderina in sense of Basilewsky (1984: 542) in having pectinate claws, the mentum without a median tooth, palpifer with one long seta, and the terminal labial palpomere fusiform. Of all the genera listed, in terms of presence of hairs on the head, pronotum and elytra, it is most similar to Trichocoptodera . These two genera can be easily distinguished by following features: in Trichocoptodera antennae short, with only two terminal antennomeres surpassing base of elytra; labrum transverse, with widely rounded anterior angles and apex without incision ( Fig. 6a ); elytra and pronotum convex; lateral expansion of pronotum narrow in anterior half; anterior edge of pronotum almost straight, posterior margin protrudes backward; elytra elongate with subparallel sides; all known species (including those that will be described in the next article) have a characteristic color, ventral side yellow or light brown, the pronotum is light with a more or less wide dark longitudinal stripe in the middle, head and elytra dark brown with copper lustre and elytra with developed yellow pattern, the lateral edges of the elytra are always contrastingly light ( Fig. 1 ); gonocoxite ( Fig. 6b ); while in Acoptodera gen. n. antennae long, with four terminal antennomeres surpassing base of elytra; labrum longer, with deeply incised apex (subgenus s. str.) or long, trapezoid ( Pericalocephala subgen. n.) ( Figs 7a, 8a ); elytra and pronotum flattened; elytra wide with rounded sides; lateral expansion of pronotum wide; anterior edge of pronotum with prominent anterior angles, posterior margin straight; the main body color is black, elytra with red spots ( Figs 2–3 ); gonocoxite ( Figs 7b, 8b ).

Description. Body black with yellow elytral pattern. Head, pronotum and elytra without microrreticulation. Pronotum and elytra flattened. Elytra wide and rounded. Lateral edge of elytra minutely or strongly serrate, with fringe of hairs. Head, pronotum and elytra covered with more or less long hairs. Antennae long, with four terminal antennomeres surpassing base of elytra. Labrum with 6 apical setae. Scape (first antennomere) with 4–10 additional setae. Anterior angles of pronotum slightly protruding forwards; lateral margins of pronotum wide, flattened and explanate. Elytra with 2 pores in third interval of elytra (basal and apical), discal pores missing; sutural stria long, not connected with first stria; scutellar pore situated near the base of first stria; umbilical series consist of 15 pores. Claws pectinate.

Etymology. The prefix a - in Latin means “of, off, from, away” indicating a relationship with genus Coptodera .

Figures

FIGURE 1. Habitus of Trichocoptodera maculata Louwerens, 1958, Paratype.

FIGURE 2. Habitus of Acoptodera (s. str.) piligera (Chaudoir, 1883).

FIGURE 3. Habitus of Acoptodera (Pericalocephala) paradoxa subgen. n., sp. n. Holotype.

FIGURES 6–8. Labrum (a) and gonocoxite (b). (6) Trichocoptodera maculata Louwerens, 1958; (7) Acoptodera (s. str.) piligera (Chaudoir, 1883); (8) Acoptodera (Pericalocephala) paradoxa subgen. n., sp. n.