Chimaeridris burckhardti

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Chimaeridris burckhardti
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Chimaeridris
Species: C. burckhardti
Binomial name
Chimaeridris burckhardti
Wilson, 1989

Chimaeridris burckhardti casent0101946 profile 1.jpg

Chimaeridris burckhardti casent0101946 dorsal 1.jpg

Specimen labels

Known only from the worker holotype, nothing is known about the biology of Chimaeridris burckhardti.

Identification

The three headed club of the antennae and the general form of the worker are quite Pheidole like in appearance. Chimaeridris differs from Pheidole in having a head that is larger than a typical Pheidole minor and smaller than a typical Pheidole major. The Chimaeridris worker mandibles are also hook shaped. Chimaeridris boltoni, the only other species in the genus, can be differentiated from Chimaeridris burckhardti by its larger size and by a number of other characters listed in the species description below.

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo (type locality), Indonesia, Malaysia.

Distribution based on AntMaps

AntMapLegend.png

Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Known only from the worker caste.

Nomenclature

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

  • burckhardti. Chimaeridris burckhardti Wilson, 1989: 66, fig. 2 (w.) BORNEO.

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

Description

Worker

Wilson 1989. Figure 2.

Holotype. Head Width (exclusive of eyes) 0.46 rom, Head Length 0.50 mm, Scape Length 0.40 mm, Eye Length 0.08 mm, Pronotal Width 0.24 mm.

Known only from the holotype. C. burckhardti shares the diagnostic generic character states with Chimaeridris boltoni, and differs from it as follows:

(1) Smaller overall size.

(2) Proportionately larger head.

(3) Basal tooth of mandible overall narrower and more acute at tip.

(4) Occipital border more strongly concave.

(5) Promesonotum more strongly convex, its dorsal surface more elevated relative to that of the propodeum, and its dorsal border smoother in side view.

(6) Propodeal spine a short tooth only slightly longer than the propodeal spiracle is wide (in C. boltoni it is several times longer than the spiracular width and about as long as the posterior propodeal face).

(7) A generally much lighter sculpturation. No rugoreticulum is present, and foveolae are absent over the body except for the propodeum and posterior margin of the katepisternum; hence most of the body is smooth and shining. Abundant costulae (low ridges) occur over all of the head, arranged in concentric circles away from a center at the antennal fossa to a distance halfway to the eye, and mostly in parallel longitudinal rows elsewhere. The clypeus bears two horizontal costulae on each of its lateral wings, in contrast to several longitudinal costulae in C. boltoni. The promesonotum, petiole, postpetiole, and gaster are mostly smooth and shining.

(8) Entire body and all of appendages concolorous brownish yellow.

Type Material

Holotype (unique): Liwagu Trail, Mt. Kinabalu, 1500 m; Ivan Lobi and Daniel H. Burckhardt May 21, 1987; specimen placed in the Museum d'Histoire Naturelle, Geneva.

Etymology

This species is named for Daniel Burckhardt, who helped collect the holotype and generously made it available for the present study.

References