Calyptomyrmex caledonicus

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Calyptomyrmex caledonicus
Calyptomyrmex caledonicus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Calyptomyrmex
Species: C. caledonicus
Binomial name
Calyptomyrmex caledonicus
Shattuck, 2011

Calyptomyrmex caledonicus side view

Calyptomyrmex caledonicus top view

This is the only species of Calyptomyrmex known from New Caledonia. It is most frequently found in leaf litter samples from rainforest sites. (Shattuck 2011)

Identification

Shattuck (2011) - Hairs on head and body thin (essentially the same width along entire length, or only slightly and gradually expanded distally, and with blunt tips), propodeum armed with short, triangular spines, mesonotum and dorsal face of propodeum forming a single, continuous surface (the mesonotum and propodeum uniformly curved). This is the only species from the Oceania region with a uniformly curved mesosomal dorsum.

Morphologically, the available material is fairly uniform although it does show moderate variation in size. However, this size variation is continuous with no indication of distinct subsets and this variation is interpreted as intraspecific.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Australasian Region: New Caledonia (type locality).


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • caledonicus. Calyptomyrmex caledonicus Shattuck, 2011: 7, fig. 4 (w.) NEW CALEDONIA.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

(n = 12) - CFW 0.10–0.14; CI 88–94; HL 0.68–0.80; HW 0.62–0.76; ML 0.63–0.79; MTL 0.28–0.35; PetI 110–133; PetL 0.16–0.21; PetW 0.21–0.26; PronW 0.42–0.52; SI 57–65; SL 0.38–0.45.

Mandibles delicately striate basally, essentially smooth apically. Eyes small, with 2–3 ommatidia in greatest diameter. Propodeum in lateral view armed with short, thin spines. Propodeal lobes essentially uniform in thickness. Node of petiole in profile cubic or box-like and higher than that of postpetiole, both approximately the same volume. In dorsal view the petiolar node narrower than the postpetiolar node. Head indistinctly rugose, the rugae tending to be longitudinal anteriorly and forming a weak network posteriorly, with the entire surface finely but distinctly punctate, the punctations partially obscuring individual rugae. Mesosoma and petiolar and postpetiolar nodes rugose superimposed over an indistinctly punctate background, the individual rugae wavy and sometimes forming a network, otherwise more or less linear. Gaster finely and indistinctly sculptured. Hairs erect, uniform in diameter or slightly swollen medially or distally, generally with sharply pointed tips. Clypeal fork with enlarged and thin hairs which are approximately the same length. Colour yellow-red, antennae and legs slightly lighter.

Type Material

Holotype worker and 1 worker paratype from Foret de Thy, New Caledonia, 21 May 1984, G. Monteith & D. Cook, rainforest, litter (Australian National Insect Collection, holotype ANIC32-05 1668, paratype ANIC32-053399).

References