Cyphocoleus cordatus, Liebherr, 2016

Liebherr, James K., 2016, Cyphocoleus Chaudoir (Coleoptera, Carabidae, Odacanthini): descriptive taxonomy, phylogenetic relationships, and the Cenozoic history of New Caledonia, Deutsche Entomologische Zeitschrift 63 (2), pp. 211-270 : 247-248

16. Cyphocoleus cordatus sp. n. Figures 31 , 116 , 123 , 134-135 , 137

Diagnosis.

This species and its adelphotaxon Cyphocoleus cardiopterus (Figs 123 , 124 ) are characterized by an orbicular pronotum with lateral and basal marginal beads continuous arcuate around the pronotal base. The pronotal disc is at most shallowly wrinkled, and is covered with well-developed microsculpture, a transverse mesh on median disc, and isodiametric mesh laterad the shallow parasagittal impressions. Both species also differ from all other Cyphocoleus in the presence of a deep lateral fovea near the front of the mesepisternum, immediately posterad the hind margin of the proepimeron. The elytral striae of Cyphocoleus cordatus are punctate, the punctures limited to the depths of the very deep striae, whereas in Cyphocoleus cardiopterus the punctures are larger; expanding strial breadth to apex of elytra. The two species can also be diagnosed by elytral microsculpture; in Cyphocoleus cordatus the elytra bear transverse-line microsculpture, whereas in Cyphocoleus cardiopterus the beetles exhibit elytra covered with an isodiametric mesh. Standardized body length 6.1-7.2 mm.

Description

(n = 5). Head capsule relatively broad, little narrower than prothorax, genae slightly convex anterad distinct, moderately constricted neck; eyes distinctly convex, oriented toward upper surface of head, ocular ratio quite variable, 1.43-1.50, 16 ommatidia across horizontal diameter of eye; frons with paired, rugose depressions that bracket median ridge, the ridge narrowed apically due to anterior broadening of depressions; frontal grooves broad, deep, expanded anterad to surround median frontal tubercle, their surfaces arcuately wrinkled; mandibles very elongate, length 2.6 × distance from antennal articulatory socket to anterolateral margin of labrum; antennae moderate, scape length 2.5 × maximal breadth; gena setose, subgenal seta present. Pronotum with front angles angulate, anterior pronotal margin broadly concave; median base continuously margined, bead elevated across base well above scutellum; median longitudinal impression deep, finely incised at depth, straight, extended basally to deep transverse groove just inside basal marginal bead, extended anteriorly nearly to well-defined anterior marginal collar that extends to front angles; anterior transverse impression by deep groove defining anterior limit of shallow transverse wrinkles, anterior callosity smooth, slightly convex behind anterior marginal collar; proepisternum extended beyond marginal bead, visible in dorsal view; proepisternum mostly smooth, with irregularities associated with shallow isodiametric microsculpture; prosternal process deeply, narrowly depressed medially before procoxae, narrowly medially depressed ventrally, posterior face with expanded triangular surface ventrally, median ridge invaginated dorsally. Elytra broadly cordate, basal margin sinuously recurved laterad depressed parascutellar striole, basal groove with deep pit at base of fourth stria; humerus broadly extended laterally at bases of striae 5-8, then evenly curved posterad outside anterior series of lateral elytral setae; discal intervals broadly convex, striae deep, all intervals of subequal convexity; parascutellar seta present, situated twice as far from basal margin than from suture, articulatory socket papillate; dorsal elytral setae absent; lateral elytral setae arranged as (5)6 + (1) + (7)8, the articulatory sockets papillate; both subapical and apical elytral setae present, their articulatory sockets subequal; subapical sinuation shallowly concave, lateral portion of concavity joined to depressed lateral margin in broad curve, medial portion near suture nearly straight; elytral apices conjoined or nearly so, no or little invagination of apical margin at fused suture. Metepisternal dorsal length 0.9 × diagonal width; metasternum with deep, circular median fossa at base of metasternal process. Abdomen with apical margin of apical ventrite shallowly concave medially in both males and females; males with one seta each side of apical margin of apical ventrite, females with two setae each side. Legs moderately elongate; metacoxae bisetose; mt1 length/tibial length = 0.24; mt4 length to apex of outer lobe 1.6 × median tarsomere length, 3-4 ventrolateral setae each side. Microsculpture on vertex dense transverse mesh; pelage little developed, head capsule, pronotum, and elytra with sparse distribution of exceedingly short microsetae, visible only in lateral view; pro-, meso-, and metasternites, and mediobasal portions of visible abdominal ventrites 2 and 3 with exceedingly short setae, other ventrites and legs glabrous except for macrosetae. Coloration of head capsule and prothorax piceous; elytra dark rufous with silvery iridescent reflection due to microsculpture; pterothoracic ventrites and elytral epipleura rufopiceous, abdominal ventrites rufous; femora dark rufous with piceous cast; tibiae rufobrunneous; tarsi rufoflavous.

Male genitalia (n = 4). Male aedeagal median lobe robust, broadly parallel sided over basal 3/4 of length, dorsoventral breadth at midlength 0.33 × distance from tip to base of closed basal bulb (Figs 134 , 135 ); lobe apex only briefly extended beyond ostial opening, tip rounded (Fig. 134 ) to subacuminate (Fig. 135 ); internal sac with large, heavily sclerotized, obtuse ventral tooth, the tooth surrounded by short, heavily sclerotized microtrichia (Fig. 135 ); sac length 2 × breadth.

Female reproductive tract (n = 1). Bursa copulatrix vase-like, basally stalked, distance from base of gonocoxites to spermathecal basal sclerite 2.75 maximum breadth (dissection compressed under cover slip) (as in Fig. 109 ); bursal walls thin, translucent, lumenal surface with thick band of long thick setae surrounding midlength; basal gonocoxite with apical fringe of four to five setae (Fig. 116 ); apical gonocoxite narrowly subtriangular with narrowly rounded apex and two lateral ensiform setae.

Types.

Holotype male (QMB deposited in MNHN): NEW CALEDONIA 11822 / 22°19 ’Sx166°55’ 480 m / Foret Nord site 1.rainfor. / 2-3 Dec 2004 pyrethrum / CJ Burwell& GB Monteith // QUEENSLAND / MUSEUM LOAN / Date: July 2005. No. LE 05.24 [green label // HOLOTYPE / Cyphocoleus / cordatus / J.K. Liebherr 2016 (black-bordered red label).

Paratypes (18 specimens). NEW CALEDONIA: Rivière Bleue, Haute Pourina, 800 m el., pyrethrum trees & logs, 22°06'S, 166°38'E, 22-xi-2000, Monteith (QMB, 4; lot no. 11210), Pourina track, 900 m el., pyrethrum trees & logs, 18-xi-2001, Monteith (QMB, 1; lot no. 8735), L’Houp Geant Trail, 330 m el., litter, rooting, 22°09.5'S, 166°30.8'E 13-iii-2007, Will (EMEC, 1), pyrethrum spray mossy log, 22°09'S, 166°41.2'E, 13-iii-2007, Will (EMEC, 2); Mt. Koghi, 600 m el., leaf litter, 22°10.7'S, 166°30.4'E, 12-iii-2007, Will (EMEC, 1), montane forest, 22°10'S, 166°31'E, 22-24-v-1987, Platnick & Raven (AMNH, 2), 500 m el., pyrethrum trunks & logs, 22°11'S, 166°31'E, 22-xi-2000, Monteith (QMB, 1: lot no. 9931); Forêt Nord, site 1, rainforest, 480 m el., pyrethrum, 22°19'S, 166°55'E, 02-03-xii-2004, Burwell & Monteith (QMB, 5; lot no. 11822).

Etymology.

The species epithet cordatus - the Latin adjective heart-shaped ( Brown 1956) - signifies the cordate elytral shape characterizing both this species and its adelphotaxon, Cyphocoleus cardiopterus (Figs 123 , 124 ).

Distribution and habitat.

This species is restricted to the southern portion of Grande Terre, allopatrically south of the distribution of its adelphotaxon, Cyphocoleus cardiopterus (Fig. 137 ). Beetles have been collected via pyrethrin spray of mossy logs and tree trunks, as well as within leaf litter.

Figures

Figures 28 - 33. 28 - 32 Male aedeagus with associated abdominal segments VIII and IX, dorsal view, Cyphocoleus spp.: 28, Cyphocoleus heterogenus; 29, Cyphocoleus angustatus; 30, Cyphocoleus mirabilis; 31, Cyphocoleus cordatus; 32, Cyphocoleus subulatus. 33. Abdominal lateroventrites VIII (left) and laterotergites VIII (right), showing membranous division of laterotergites, male Cyphocoleus latipennis. Dorsal gland reservoir is globose without dorsal lobe. For abbreviations see Table 1.

Figures 113 - 120. Female right gonocoxae, ventral view, for Cyphocoleus spp. illustrating apical fringe setae of basal gonocoxite 1, and two lateral ensiform setae, one dorsal ensiform seta, and two apical nematiform setae on apical gonocoxite 2; 113, Cyphocoleus fasciatus, Mt. Panie; 114, Cyphocoleus cychroides, Pic d'Amoa; 115, Cyphocoleus latipennis Mt. Panie; 116, Cyphocoleus cordatus, Foret Nord; 117, Cyphocoleus globulicollis, Col des Roussettes; 118, Cyphocoleus flavipes, Noumea; 119, Cyphocoleus bourailensis, Bourail; 120, Cyphocoleus subulatus, Foret de Thi. Scale bar, 0.10 mm.

Figures 121 - 125. Dorsal habitus photographs of Cyphocoleus spp., environmental patina removed: 121, Cyphocoleus cychroides male, Tionaki Tal; 122, Cyphocoleus latipennis male, Mt. Panie; 123, Cyphocoleus cordatus female, Foret Nord; 124, Cyphocoleus cardiopterus female, Mt. Mou; 125, Cyphocoleus globulicollis female, Col des Roussettes.

Figures 126 - 136. Male aedeagal median lobe and associated parameres of Cyphocoleus spp., dextral view: 126 - 133, Cyphocoleus latipennis; 126, internal sac everted, Mandjelia; 127 - 128, Mandjelia; 129, Mt. Panie; 130, Pic d'Amoa; 131 - 132, Aoupinie; 133, Ouenarou; 134 - 135, Cyphocoleus cordatus; 134, Mt. Koghi; 135, Cyphocoleus cordatus, internal sac everted, Foret Nord; 136, Cyphocoleus cardiopterus, Dzumac Rd. jct.

Figures 137 - 140. Distribution maps of Cyphocoleus spp.: 137, Cyphocoleus cychroides, Cyphocoleus cordatus, Cyphocoleus cardiopterus; 138, Cyphocoleus latipennis; 139, Cyphocoleus globulicollis; 140 Cyphocoleus flavipes, Cyphocoleus bourailensis.

Figures 105 - 112. Female reproductive tract, ventral view, for Cyphocoleus spp.; 105, Cyphocoleus mirabilis, Mt. Koghi; 106, Cyphocoleus fasciatus, Mt. Panie; 107, Cyphocoleus cychroides, Pic d'Amoa; 108, Cyphocoleus latipennis, Mt. Panie; 109, Cyphocoleus cardiopterus, Mt. Mou; 110, Cyphocoleus globulicollis, Col des Roussettes; 111, Cyphocoleus flavipes, Noumea; 112, Cyphocoleus subulatus, Foret de Thi. For abbreviations see Table 1.