Calycina horaki, Ruzzier, Enrico & Kovalev, Alexey V., 2016

Ruzzier, Enrico & Kovalev, Alexey V., 2016, First record of Calycina Blair, 1922 (Coleoptera, Mordellidae) in the Russian Far East with description of a new species, Zootaxa 4103 (1), pp. 75-78 : 75-78

Calycina horaki sp. n. ( Figs. 1–6 )

Type material. HOLOTYPE, ♀ ( Figs. 1, 2 ) with label: “Приморский край, Хасанский р-н, Витязь, Кирейчук 15.VII. 984” [Primorye Region, Khasan District, Vityaz’ vill., A.G. Kirejtshuk leg., 15.VII.1984] ( ZISP).

Description. Female. Length 12.5 mm from tips of mandibles to apex of elytra and 13.2 mm from tips of mandibles to apex of pygidium.

Head, thorax, elytra and legs black; abdomen bright red-orange; antennae, labrum, labial and maxillary palpi brownish-black. Metathoracic tibial apical spurs and tarsal claws reddish-brown. Integument shiny, with more or less pronounced iridescent lustre. Dorsal pubescence thin, brownish-black on pronotal disc and elytra and slightly lighter on head, legs and venter. Abdominal pubescence pale yellow.

Head. Head ( Figs. 3, 4 ) convex and distinctly transverse (Ratio: 1.3 w /l); width and 0.9X maximal pronotal width. Frons medially depressed. Temples very broad, rounded, strongly protruding laterally. Eyes small, shallowly emarginated anteriorly and minutely facetted, with small interfacetal setae. Eyes not reaching the occiput and without hypocranial expansion. Integument finely punctate; space between punctures about as great as one puncture diameter. Terminal maxillary palpomere elongate, securiform, rounded at inner angle and with deep ventral concavity. Antennae ( Fig. 5 ) serrate, dilated from antennomere four; first antennomere 2.2X as long as wide and about 1.5X as long as the second; antennomere two about 1.4X as long as wide; antennomere three elongate, 1.75X as long as wide, fourth antennomere elongately subtriangular, 1.3X as long as wide, slightly longer than following antennomeres; antennomeres 5–10 subequal in shape, somewhat broader than long (0.75–0.95X l/w); antennomere eleven small, subclavate.

Thorax. Pronotum ( Fig. 6 ) about 1.2X as broad as long. Anterior lobe narrow, distinctly protruding and sinuate at sides; basal lobe broad, slightly protruding, moderately sinuate at sides and widely arcuate at apex. Lateral edges slightly convex in lateral view. Posterior angles rectangular, rounded. Disc with fine and homogeneous punctures, much larger than those on head; interspaces between punctures about as great or somewhat greater than one puncture diameter.

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Scutellum triangular. Metathoracic episterna, sides of metathoracic ventrite and metathoracic coxae finely punctured, interspaces between punctures distinctly larger than puncture diameter. Metathoracic ventrite and metathoracic coxae along middle with coarse and transversely confluent punctation becoming transversely vermiculate at metathoracic coxal process. Prothoracic tibia straight; prothoracic tarsus about 1.3X as long as prothoracic tibia, prothoracic tarsomere four elongate and slightly emarginate apically; ratios of relative lengths of prothoracic tarsomeres 1–5 about as 1.00: 0.69: 0.38: 0.37: 0.58. Mesothoracic tarsus about 1.7X longer than mesothoracic tibia, ratios of relative lengths of mesothoracic tarsomeres 1–5 about as 1.00: 0.59: 0.34: 0.30: 0.41, prothoracic tarsomere four slightly emarginate apically. Metathoracic tibia with one short preapical ridge and with one row of large punctures along its outer side. Each inner metathoracic tibial spur 2.2X longer than outer one. Ratios of relative lengths of metathoracic tarsomeres 1–4 about as 1.00: 0.55: 0.48: 0.55.

Elytra. Elytra convex, about 2.1X as long as combined width at humeri, slightly dehiscent along suture along posterior third. Lateral edges in dorsal view only slightly convergent apically and feebly rounded before apices. Each elytron with four marked longitudinal ribs on disc; apices separately subacute. Integument with irregularly transversely confluent punctures; punctation dense at base and becoming finer posteriorly, coarsely and transversely vermiculate at humeral callus.

Abdomen. Pygidium not covered by elytra, short and stout, not carinate and rounded apically, 1.3X long as hypopygidium and about 1.1X long as wide at base. Abdominal ventrites finely punctate, interstitial space greater than puncture diameter. Sternite 8 with long spiculum ventrale,,widely rounded apically. Ovipositor moderately long, with short gonocoxites and small styli.

Male unknown.

Etymology. The new species is named after Jan Horák (Prague), mordellid specialist, as a sign of friendship and esteem.

Diagnosis. Calycina horaki should be assigned to the palpalis species-group (sensu Ruzzier 2013) having the third antennomere not dilated and smaller than the following. The new species should be placed near C. nigroapicalis Nomura, 1967 and C. sericeobrunnea (Blair, 1915) with respect to body shape. From C. nigroapicalis the new species can be separated by the head and pronotal color: brownish-red in C. nigroapicalis , black in C. horaki . From C. sericeobrunnea it differs in the general coloration of the integument: deeply black with bright orange abdomen instead brownish-black in C. sericeobrunnea .

Note. The records of Macrotomoxia castanea Pic, 1922 from the Russian Far East ( Odnosum & Horák 1997; Odnosum 2003) likely refer to the new species described above.

Figures

FIGURES 1 – 2. Calycina horaki sp. n., holotype. 1 — habitus, dorsal view; 2 — habitus, lateral view. Scale bar = 5 mm.

FIGURES 3 – 8. Details of Calycina horaki sp. n. (3 – 6), C. palpalis palpalis (Blair 1922) (7) and C. palpalis ruzzieri Leblanc 2013 (8). 3 — head, dorsal view; 4 — head, lateral view; 5 — right antenna; 6 — pronotum; 7, 8 — male maxillary palpus (after Leblanc 2013). Scale bars for Figures 3, 4, 6 = 1 mm. Scale bar for Figure 5 = 1 mm.