Calyptomyrmex grammus

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

Calyptomyrmex grammus side view

Calyptomyrmex grammus top view

This species has only been encountered a handful of times. It is restricted to Far North Queensland rainforest where it has been collected from leaf litter samples.

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 spines, gaster weakly punctate, mesonotum rugo-reticulate, the rugae running longitudinally, petiolar node relatively broad and thin in dorsal view. This species is most similar to Calyptomyrmex ocullatus but can be separated from it by the presence of longitudinal rugae on the mesonotum (these are absent in ocullatus) and the petiolar node being relatively broad and thin in dorsal view (it is narrower and thicker in ocullatus).

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Australasian Region: Australia (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.

  • grammus. Calyptomyrmex grammus Shattuck, 2011: 12, fig. 8 (w.) AUSTRALIA.

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

Description

Worker

(n = 5) - CFW 0.10–0.11; CI 94–98; HL 0.71–0.75; HW 0.70–0.73; ML 0.67–0.71; MTL 0.29–0.33; PetI 175–199; PetL 0.15–0.18; PetW 0.30–0.32; PronW 0.50–0.52; SI 58–61; SL 0.41–0.43.

Mandibles delicately striate basally, essentially smooth apically. Eyes small, with 3–4 ommatidia in greatest diameter. Propodeum in lateral view armed with short, broad spines. Propodeal lobes slightly thickened posteriorly. Node of petiole in profile slightly higher than that of postpetiole, both approximately the same volume. In dorsal view the petiolar node similar in width or slightly broader 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, stronger anteriorly and fading slightly posteriorly. Hairs on head and body erect, uniform in diameter or narrowing slightly towards the base, generally with sharply pointed tips. Clypeal fork with enlarged and thin hairs, the thin hairs slightly longer. Colour red-brown, antennae and legs slightly lighter.

Type Material

References