Leptogenys loarelae Ramage, 2019

Ramage, Thibault, Jouault, Corentin, Schmidt, Alexander R., Seyfullah, Leyla J. & Perrichot, Vincent, 2019, Two new ant species (Formicidae: Dorylinae, Ponerinae) from New Caledonia, European Journal of Taxonomy 589, pp. 1-14 : 4-7

publication ID

https://doi.org/ 10.5852/ejt.2019.589

publication LSID

lsid:zoobank.org:pub:948DBFCE-382B-4B50-A844-6BB987608E65

DOI

https://doi.org/10.5281/zenodo.3664193

persistent identifier

https://treatment.plazi.org/id/819E8C18-56F7-4CB5-AE07-00B5406D924A

taxon LSID

lsid:zoobank.org:act:819E8C18-56F7-4CB5-AE07-00B5406D924A

treatment provided by

Plazi

scientific name

Leptogenys loarelae Ramage
status

sp. nov.

Leptogenys loarelae Ramage sp. nov.

urn:lsid:zoobank.org:act:819E8C18-56F7-4CB5-AE07-00B5406D924A

Fig. 1 View Fig

Diagnosis

Leptogenys loarelae Ramage sp. nov. can be distinguished from other New Caledonia species of Leptogenys by the unique combination of the following features: integument smooth and shining, mostly black colored with blueish reflection; third antennal segment markedly elongate, more than twice the length of pedicel; mandible elongate, triangular; petiole elongate, nearly three times longer than broad in dorsal view.

Etymology

The specific epithet refers to the first name of Thibault Ramage’s daughter, Loarel. The species epithet is to be treated as a noun in the genitive case.

Type material

Holotype

NEW CALEDONIA • wingless ♀; Grande Terre, Province Sud, Sarraméa, Plateau de Dogny trail; 21°37′10.7″ S, 165°52′31.9″ E; 897 m; 16 Nov. 2011; V. Perrichot leg. [VP209]; mixed mountain forest, hand picking on ground; MNHN. GoogleMaps

Description

Worker holotype

MEASUREMENTS (in mm). TL 11.5; HL 2.06; HW 1.3; SL 2.56; ED 0.5; PW 1.16; MSL 3.65; PL 1.83; PH 0.8; DPW 0.63; CI 62.9; SI 197.4; LPI 43.6; DPI 34.5.

HEAD. Elongate, sub-trapezoidal, lateral sides diverging anteriorly ( Fig. 1B View Fig ); lateral margin barely convex; posterior margin weakly concave medially, posterior lateral corners rounded. Clypeus triangular, with blunt apex and sligthly concave side margins. In full-face view, eye large, oval, maximum diameter greater than twice the maximum width of scape; placed at head midline. Antennae with scape long and slightly enlarged medially, surpassing posterior margin of head by its 2⁄₅ th; funicular segments elongate;

third antennal segment markedly elongate, more than twice the length of the second. Mandible triangular, elongate, shorter than head width; masticatory margin edentate.

MESOSOMA ( Fig. 1A, C View Fig ). Elongate, compressed laterally, widest at pronotum; mesosomal dorsal surface in profile slightly convex. In dorsal view, mesonotum as long as broad. Propodeal spiracle slit-like. Petiole ( Fig. 1A View Fig , C–D) elongate, nearly three times as long as broad, trapezoidal, widest at apex; dorsal surface of petiolar node convex, posterior surface slightly concave, anterodorsal and posterodorsal corners angular. Subpetiolar process small, trapezoidal; located beneath anterior 1⁄₅ th of the petiole ( Fig. 1D View Fig ). Gaster elongate.

INTEGUMENT. Smooth and shining, very finely and sparsely punctate; mostly black with blueish reflection, except mandibles, antennal radicel and funicular articles, tarsomeres and hypopygium and pygidium reddish brown. Dorsum of body covered by erect and suberect yellow setae; setae longer on head, scape, pronotum, procoxa and gaster, but shorter on remaining body.

Key to the Leptogenys species (workers) of New Caledonia (modified from Wilson 1958)

1. Large species (HW> 1.2 mm) .......................................................................................................... 2

– Small species (HW ≤ 1.2 mm) .......................................................................................................... 3

2. Mandibles exceptionally long, their length measured from insertion to tip exceeding the head width ( Fig. 2A View Fig ) ............................................................................................ Leptogenys rouxi Emery, 1914

– Mandibles shorter, their length much less than the head width ( Fig. 1B View Fig ) ....................................... .......................................................................................... Leptogenys loarelae Ramage sp. nov.

3. Head entirely covered by coarse punctures ( Fig. 2C View Fig ) .................. Leptogenys punctata Emery, 1914

– Head entirely smooth and shining ( Fig. 2B View Fig ) ..................................................................................... 4

4. Larger species, head width ≥ 0.9 mm; in dorsal view, posterior corners of petiolar node forming distinct angles of 45–50° ( Fig. 3A View Fig ) .......................................... Leptogenys acutangula Emery, 1914

– Smaller species, head width not exceeding 0.75 mm; in dorsal view, posterior corners of petiolar node thick and broadly rounded ( Fig. 3B View Fig ) ..................................... Leptogenys sagaris Wilson, 1958

Subfamily Dorylinae Leach, 1815

Genus Lioponera Mayr, 1879

MNHN

Museum National d'Histoire Naturelle

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

Genus

Leptogenys

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