Cyphocoleus cychroides Chaudoir, 1877

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 : 244

14. Cyphocoleus cychroides Chaudoir, 1877 Figures 107 , 114 , 121 , 137

Diagnosis.

Among all the smaller-bodied species with orbicular pronotum and cordate elytra (Figs 121-125 , 161-164 ), this species stands out due to the narrowly orbicular pronotum, MPW/PL = 0.88-0.94, and pronotal disc that is evenly traversed by wrinkles but without longitudinal parasagittal impressions. The pronotal lateral marginal beads arcuately extend to the narrow median base (Fig. 121 ). Some individuals of Cyphocoleus latipennis have the pronotum nearly as narrow, MPW/PL = 0.92-1.07, but beetles comprising Cyphocoleus cychroides differ by their lack of supraorbital setae, whereas Cyphocoleus latipennis is characterized by presence of the posterior seta, though it is located well behind the eye just anterad the constricted neck. The pronotal disc of Cyphocoleus latipennis also differs by the presence of parasagittal impressions, and median pronotal base not arcuately and continuously margined as in Cyphocoleus cychroides . Standardized body length 6.0-7.2 mm.

Description

(n = 5). Head capsule narrowly ovoid, genae gradually narrowed to moderately constricted neck; eyes only slightly convex, oriented toward upper surface of head, ocular ratio quite variable, 1.20-1.56, about 18 ommatidia across horizontal diameter of eye; frons with paired, longitudinal depressions that surround a low median ridge; frontal grooves broad, deep, parallel, extended from just anterad hind margin of eye onto clypeus; mandibles elongate, length 2.1 × distance from antennal articulatory socket to anterolateral margin of labrum; antennae moderately elongate, scape length 2.75 × maximal breadth; gena setose, subgenal seta present. Pronotum with front angles rounded, only slightly protruded; median base continuously margined, but bead straight along base; median longitudinal impression finely incised, slightly irregular as it traverses transverse wrinkles; anterior transverse impression a deep, oblique depression, defining a flat anterior callosity with indistinct longitudinal wrinkles; proepisternum slightly extended beyond marginal bead, narrowly visible in dorsal view; proepisternum mostly smooth, with indistinct vertical wrinkles; prosternal process broadly, medially depressed anteriorly, with paired, shallow longitudinal depressions ventrally, posterior face broadly convex. Elytra broadly cordate, basal groove sinuously incurved near depressed scutellum, continued in broad curve laterally around humerus, a slight hitch in the curve near base of third stria; discal intervals moderately convex, all intervals of subequal convexity; elytral striae deep, punctate, the punctures larger basally where they expand strial breadth; parascutellar seta present, articulatory socket papillate; dorsal elytral setae absent; lateral elytral setae arranged as 6 + 7, the articulatory sockets papillate; both subapical and apical elytral setae present, the articulatory socket for apical seta smaller; subapical sinuation well developed, lateral portion of concavity joined to depressed lateral margin in broad curve; elytral apices conjoined, no invagination of apical margin at fused suture. Mesepisternum impunctate; metepisternal dorsal length 1.1 × diagonal width; metasternum with broad, shallow 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 = 0.27; mt4 length to apex of outer lobe 1.6 × median tarsomere length, 3-4 ventrolateral setae each side. Microsculpture on vertex stretched isodiametric mesh, the head capsule glossy; pronotal disc with evident transverse mesh visible within transverse wrinkles, the surface matte; elytral intervals covered with transverse-line microsculpture resulting in silvery iridescence; pelage little developed, glossy head capsule glabrous, pronotum and elytra with sparse distribution of exceedingly short microsetae, visible only in lateral view; ventrites and legs glabrous except for macrosetae. Coloration of body dorsum piceous, mouthparts, scutellum, and apical elytral margin rufopiceous; body venter including elytral epipleura rufopiceous; femora dark rufous; tibiae piceous medially, rufoflavous at base and apex; tarsi rufoflavous.

Male genitalia (n = 10). Male aedeagal median lobe robust, broadly parallel sided over basal 2/3 of length, the lobe shaft angled ventrally ventral ostial opening, dorsoventral breadth at midlength 0.20-0.25 × distance from tip to base of closed basal bulb (Figs 91-98 ); lobe apex sinuously curved, tip may be knob-like with a constriction distad ostial opening (Figs 91 , 92 ) or abruptly narrowed distad ostial opening to a parallel-sided apex (Figs 93-98 ); internal sac membranous without melanized microtrichia, length slightly greater than breadth (Figs 91 , 93 , 94 , 96 ). Although the male aedeagi of individuals assigned to Cyphocoleus globulicollis exhibit substantial variation in the configuration of the apex, all of this variation is exhibited among individuals from the same well-sampled site; Mandjélia. All individuals from this site share other external attributes, as well as the subangulate apex to the aedeagal median lobe, and so this variation is interpreted as infraspecific.

Female reproductive tract (n = 2). Bursa copulatrix vase-shaped, abruptly narrowed distally near spermatheca, distance from base of gonocoxites to spermathecal basal sclerite 3 × maximum breadth (dissection compressed under cover slip) (Fig. 107 ); bursal walls thin, translucent, lumenal surface smooth; basal gonocoxite with apical fringe of five to six setae (Fig. 114 ); apical gonocoxite broadly triangular with pointed apex and two lateral ensiform setae.

Types.

Holotype male (MNHN): Ex Musæo / Chaudoir (red-inked white label with red border) // HOLOTYPE / Cyphocoleus / cychroides / Chaudoir 1877 (black-bordered red label). Holotype status is based on Chaudoir’s (1877: 197) statement: "Il m’a été vendu par H.M. Deyrolle." Mandjélia summit, 750 m el. hereby designated type locality.

Distribution and habitat.

Known from Province Nord. The recorded distribution is bounded by Canala on the south, and Col d’Amoss along the northeastern coast (Fig. 137 , Suppl. material 3). Beetles have been collected from logs and trunks via the application of pyrethrin fog.

Figures

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.

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 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 161 - 164. Dorsal habitus photographs of Cyphocoleus spp., environmental patina removed: 161, Cyphocoleus flavipes Yahoue; 162, Cyphocoleus bourailensis, Bourail; 163, Cyphocoleus subulatus, Mt. Koghi; 124, Cyphocoleus iledespinsensis, Ile des Pins.

Figures 86 - 98. Male aedeagal median lobe and associated parameres of Cyphocoleus spp., dextral view: 86, Cyphocoleus burwelli, internal sac everted, Ningua Res.; 87, Cyphocoleus angustatus, dextroventral view, internal sac everted, Mt. Panie; 88, Cyphocoleus monteithi, Parque Prov. Riviere Bleue, Haute Pourina; 89, Cyphocoleus miricollis, Mt. Mou; 90, Cyphocoleus fasciatus, dextral view, sac partially everted, Mt. Panie; 91 - 98, Cyphocoleus cychroides; 91, internal sac everted, Mandjelia; 92 - 93, Mandjelia; 94, internal sac everted, Hienghene; 95, Touho; 96, Tionaka Tal; 97, Ateou; 98, Pic d'Amoa. Scale bars, 1.0 mm: horizontal scale for figures with transverse orientation; vertical scale for figures with vertical orientation.