Calyptomyrmex rectopilosus

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Calyptomyrmex rectopilosus
Calyptomyrmex rectopilosus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Calyptomyrmex
Species: C. rectopilosus
Binomial name
Calyptomyrmex rectopilosus
Dlussky & Radchenko, 1990

Calyptomyrmex rectopilosus side view

Calyptomyrmex rectopilosus top view

Calyptomyrmex rectopilosus nests in rotting twigs and wood fragments on the floor of well-developed forests. Colonies are usually small, consisting of dozens of workers. This is one of only two Calyptomyrmex species currently known from the South-east Asian mainland (the other being Calyptomyrmex beccarii). (K. Eguchi pers. comm.; Eguchi, Bui and Yamane 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 moderately long, narrow spines, petiolar node leaning slightly posteriorly, the anterior face rounding into the dorsal face, in dorsal view broader than long; rugae on dorsum of head widely spaced, the underlying punctate surface clearly visible, the rugae fading posteriorly and essentially absent near the posterior margin. This species can be separated from others in this region by the thin body hairs, relatively long, narrow propodeal spines and the configuration of the cephalic sculpturing.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Oriental Region: Cambodia, Thailand, Vietnam (type locality).
Palaearctic Region: China.

Distribution based on AntMaps

AntMapLegend.png

Distribution based on AntWeb specimens

Check data from AntWeb

Nomenclature

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

  • rectopilosus. Calyptomyrmex rectopilosus Dlussky & Radchenko, 1990: 124, figs. 7, 8 (w.) VIETNAM. See also: Shattuck, 2011: 17.

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

Description

Worker

(holotype) - CFW 0.10; CI 97; HL 0.63; HW 0.60; ML 0.57; MTL 0.25; PetI 163; PetL 0.12; PetW 0.20; PronW 0.40; SI 57; SL 0.35.

Mandibles striate basally, essentially smooth apically. Eyes small, with 2–3 ommatidia in greatest diameter. Propodeum in lateral view armed with moderately long, narrow spines. Propodeal lobes uniform in thickness. Node of petiole in profile higher and narrower than that of postpetiole. In dorsal view the petiolar node similar in width to postpetiolar node. Head with widely spaced and indistinct rugae anteriorly, fading to essentially absent posteriorly, with the entire surface distinctly punctate. Upper section of mesosoma with irregular, wavy rugae superimposed over a punctate background; lower section of mesosoma (above legs), propodeum, petiole and postpetiole punctate. Gaster finely and indistinctly punctate and with a semi-matte appearance. Hairs on head and body erect, uniform in diameter and with sharp or blunt tips. Clypeal fork with short, thickened hairs basally and thin, elongate hairs distally. Colour yellow-red, the gaster slightly darker.

Type Material

Holotype worker from "Archipelago Baitylong, Isl. Dongho", Quang Ninh Prov., Vietnam (Institute of Zoology, Ukrainian Academy of Science). This island is also known as Do Dông Khoa, Ba Mùn Island and Cao Lô Island (and probably other names) and is located approx. 100km ENE Hi Phòng at approx. 21º00’N 107º35’E.

References