Coptodera (Coptoderina) chaudoiri Andrewes

Hunting, Wesley & Yang, Man-Miao, 2019, A taxonomic review of the pericaline ground-beetles in Taiwan, with descriptions of new species (Coleoptera, Carabidae, Lebiini), ZooKeys 816, pp. 1-164 : 53-57

Coptodera (Coptoderina) chaudoiri Andrewes Figs 36A, B, 37A, B, 38 A–C, 57A, 59

Coptodera chaudoiri Andrewes, 1919: 179; Lorenz 2005: 457.

Coptoderina transversa anguilipennis Nakane & Okhura, 1956: 47; Jedlička 1963: 349.

Coptoderina chaudoiri anguilipennis (Nakane & Okhura): Lorenz 2005: 457. syn. n.

Coptodera nobilis Jedlička, 1963: 349; Lorenz 2005: 458. syn. n.

Types and other material examined.

28 specimens of C. chaudoiri : 17 males and eleven females. Types of both C. transversa anguilipennis and C. nobilis were examined and dissected. Specimens of these proposed species did not differ in any way from C. chaudoiri , other than the very slight and normal variability typical of the subgenus Coptoderina . For further details see EH Strickland Virtual Entomology Museum Database.

Type locality.

Hong Kong.

Diagnosis.

Specimens of this species are distinguished from other species of Taiwanese Coptodera by a combination of having two setae in the basal 1/3 of stria 3, a head that is smooth or only slightly rugulose between eyes and males with adhesive vestiture on tarsomeres 1-3 of mid-leg (all others with only 1-2).

Description.

OBL 6.33 - 8.66 mm. Length (n = ten males, ten females): head 0.76 - 0.96, pronotum 0.96 - 1.36, elytra 3.50 - 5.33, metepisternum 0.92 - 1.28 mm; width: head 1.44 - 1.88, pronotum 1.84 - 2.56, elytra 2.83 - 4.00, metepisternum 0.52 - 0.80 mm.

Body proportions. HW/HL 1.89 - 2.26; PWM/PL 1.79 - 2.00; EL/EW 1.32 - 1.38; ML/MW 1.32 - 1.76.

Color. Fig. 36A, B. Dorsum of head brunneo-piceous to piceous, clypeus and labrum brunneo-testaceous to rufo-brunneous, antennae and palpi rufo-brunneous; disc of pronotum brunneo-piceous to piceous, lateral margins testaceous to brunneous, always lighter then disc, some transparent at margins; disc of elytra black, with four testaceous macula, two anterior and two posterior, variable, anterior macula from interval 3 to 7 (some 3 to 6), closest to base of elytra in interval 5, closest to apex of elytra in interval 4 and 5, posterior macula from stria 1 to interval 8, closest to base of elytra in interval 5, closest to apex of elytra in interval 3 and 4; margins of elytra testaceous to rufo-brunneous; ventral surface with thoracic and abdominal tergites rufo-brunneous to rufo-piceous, margins of abdominal tergites and metepisternum darker; legs contrastingly lighter, with trochanter and femora and tarsi testaceous to brunneo-testaceous, tibia rufo-brunneous to darker on dorsal surface.

Microsculpture. Dorsum of head with microsculpture granulate, isodiametric, easily visible at 50 × magnification; pronotum microsculpture granulate, isodiametric; elytral disc with sculpticells somewhat granulate, nearly isodiametric, cells up to 1.5 × longer than wide; ventral surface of head, smooth with microsculpture not visible at 50 ×; prosternum, proepipleuron, mesepisternum and metepisternum with sculpticells forming a shallow, somewhat transverse to transverse mesh.

Macrosculpture. Dorsum of head faintly rugulose to smooth between eyes, clypeus faintly rugulose to smooth, both head and clypeus with relatively dense, fine and scattered setigerous punctures, punctures not visible and setae hardly visible at 50 ×; pronotum with disc rugulose, entire surface with fine and scattered setigerous punctures, punctures not visible but setae visible in side view at 50 ×; elytra with intervals rounded, fine scattered setigerous punctures on entire dorsal surface, hardly visible in lateral view at 50 ×, striae relatively wide (three to four cells), concave and blending into intervals smoothly, punctate, with single row of fine scattered setigerous punctures, hardly visible in lateral view at 50 ×; ventrally, thoracic and abdominal sclerites with scattered setigerous punctures throughout.

Fixed setae. Elytra with two setae in apical half of stria 2, two setae in basal 1/3 of stria 3.

Luster. Dorsal surface moderately dull.

Head. Mandibles somewhat curved at apex, somewhat long and narrow in form; labrum bilobed, widely emarginate, broadly rounded and relatively short.

Pronotum. Transverse impression deep; posterior transverse impression moderately shallow, median longitudinal impression shallow; lateral margins explanate, apico-lateral margins rounded, broadly lobed, posterio-lateral margins broadly rounded, obtuse.

Elytra. Apex almost truncate.

Legs. Two rows of small squamo-setae on tarsomeres 1-3 of mid-leg, males with one notch apically on ventral side of mid-tibia.

Male genitalia. Figs 37A, B, 38 A–C. Length 1.28 - 1.58 mm. Ostium catopic, positioned slightly more to left side of dorsal surface. Phallus cylindrical, distinctively curved to the left from mid-length to apex in ventral view, apical area short, apex broadly rounded; endophallus wide and straight, two rows of spines (esp) from mid-length towards apex, joining before apex, spine rows variable, some specimens with more sclerotized spines and additional spines where rows become confluent.

Female genitalia. Fig. 57A. Width 1.26 mm. One spermatheca (sp1), cylindrical and long, ribbed laterally along length; one spermathecal accessory gland (sg), narrow and somewhat cylindrical; spermathecal gland duct (sgd) with swelling towards apex, attachment site apically on small diverticulum (div) of spermatheca; bursa copulatrix (bc) with distinctive sac at apical end (bs), large and bulbous.

Habitat, habits, and seasonal occurrence.

The known elevational range of C. chaudoiri is from 250 to 1125 meters with the majority of specimens collected from 480 to 750 meters. Adults of this species are found in mixed forest of montane areas and are crepuscular and can be found on trunks of live trees, and on bracket fungus. Specimens have been collected from May to September. Methods of collecting include u.v. light sheet, sweep netting near lights at night and hand collecting.

Geographical distribution.

Coptodera chaudoiri is known from Japan and Taiwan. For Taiwan localities see Figure 59.