Cyphocoleus angustatus, 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 : 233-236

7. Cyphocoleus angustatus sp. n. Figures 29 , 79 , 84 , 87

Diagnosis.

As the second half of the sibling species pair also including Cyphocoleus burwelli , this species can be diagnosed by the more basally constricted pronotum, MPW/BPW = 1.84-1.91 versus values of 1.72-1.83 for Cyphocoleus burwelli . The pronotum is also relatively broader overall, with MPW/PL = 0.72-0.77 versus values of 0.68-0.72 for Cyphocoleus burwelli . The elytra are broader basally in Cyphocoleus angustatus , with MEW/HuW = 2.60-2.79 versus 2.78-3.19 Cyphocoleus burwelli . The humeral angle is positioned more anteriorly relative to the scutellum, and is very distinctly right angled to slightly acute in this species (Fig. 84 ). If a male can be dissected, the aedeagal median lobe apex is broadly expanded in this species, and the internal sac bears an apical “cockscomb” of densely packed macrotrichia (Fig. 87 ). Standardized body length 11.0-11.6 mm.

Description

(n = 3). (The description of Cyphocoleus burwelli can serve for this species, with the following exceptions). Head capsule with mandibles exceedingly elongate; length 4.9 × distance from antennal articulatory socket to anterolateral margin of labrum; antennae exceedingly elongate, gracile, scape length 4.9 × maximal breadth. Pronotum margined basally with narrow, little upraised bead crossing median base between the distinctly margined, rounded hind angles. Elytra narrowly ovoid, extremely narrow basally; two dorsal elytral setae present at positions of middle and posterior seta; lateral elytral setae arranged as 6 + 1 + 7, or 6 + 8. Legs extremely elongate, gracile; metacoxae trisetose, two setae on lateral surface fore and aft, and a third large seta medial to posterior seta (short setae comprising part of ventral pelage also present); mt4 with length to apex of outer lobe 1.45 × median tarsomere length. Coloration of legs paler than piceous thoracic and rufopiceous abdominal ventrites, femora dark rufous with piceous cast, tibiae rufobrunneous, and tarsi paler, brunneous to rufoflavous.

Male genitalia (n = 2). Male aedeagal median lobe robust, broadly parallel sided to near distal margin of ostial opening, dorsoventral breadth at midlength 0.2 × distance from tip to base of closed basal bulb (Fig. 87 ); lobe shaft melanic, the internal sac obscured in uneverted position by the moderately melanized lobe wall; lobe apex with very broadly rounded tip, length distad ostial opening less than breadth; internal sac with well-developed apical “cockscomb” composed of densely packed, elongate, melanized, spike-like macrotrichia, the basal half of sac densely covered with short, melanized microtrichia.

Types.

Holotype male (QMB deposited in MNHN): NEW CALEDONIA / Mt Panié, 1300 m / 3-xi-1988 / R. Raven // QUEENSLAND / MUSEUM LOAN / DATE: Jan. 2004 / No. LE 04.01 (green label) // Cyphocoleus revision / measured specimen 1 / J.K. Liebherr 2015 male 2 // HOLOTYPE / Cyphocoleus / angustatus / J.K. Liebherr 2016 (black-bordered red label).

Paratypes (7 specimens). NEW CALEDONIA: Mt. Panié, 730 m el., under stones amongst ants, 20°32'S, 164°44'E, 24-viii-1914, Montague (BMNH, 2), 28-viii-1914, Montague (BMNH, 1), 1300 m el., 20°34'S, 164°46'E, 03-xi-1988, Raven (QMB, 1), refuge, 1350 m el., 20°34'S, 164°46'E, 08-09-xi-2001, Balke & Wewalka (ZSM, 2).

Etymology.

The narrow, elongate pronotum and very narrow elytral humeri (Fig. 84 ) suggest the adjectival species epithet, angustatus , based on the Latin angustus, or narrow ( Brown 1956).

Distribution and habitat.

This species is known only from Mt. Panié, with localities at 730 m elevation in 1914, and from 1300-1350 m elevation for more recently collected material (Fig. 79 ). P. D. Montague’s specimens (see Turner 1919) are labeled as being collected "under stones amongst ants", although the level of interaction among beetles and ants, if any, is not known.

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 76 - 81. Distribution maps of Cyphocoleus spp.: 76, Cyphocoleus lissus; 77, Cyphocoleus heterogenus, Cyphocoleus prolixus; 78, Cyphocoleus parovicollis, Cyphocoleus ovicollis; 79, Cyphocoleus burwelli, Cyphocoleus angustatus, Cyphocoleus monteithi; 80, Cyphocoleus miricollis, Cyphocoleus fasciatus; 81, Cyphocoleus mirabilis, Cyphocoleus moorei, Cyphocoleus lescheni.

Figures 82 - 85. Dorsal habitus photographs of Cyphocoleus spp.: 82, Cyphocoleus ovicollis female, Ningua Res.; 83, Cyphocoleus burwelli female, Mt. Canala; 84, Cyphocoleus angustatus male, Mt. Panie; 85, Cyphocoleus monteithi male, Dzumac Rd. jct.

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.