Discothyrea berlita

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Discothyrea berlita
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Proceratiinae
Tribe: Proceratiini
Genus: Discothyrea
Species: D. berlita
Binomial name
Discothyrea berlita
Fisher, 2005

Discothyrea berlita casent0007016 profile 1.jpg

Discothyrea berlita casent0007016 dorsal 1.jpg

Specimen labels

The single specimen was collected in a leaf litter sample in the only remaining patch of dense native vegetation near the summit of Le Pouce (Mauritius). Samples from other nearby mountain tops. Pieter Both (823 m), Calebasses (c.600 m), did not uncover any endemic Proceritiinae. (Fisher 2005)

Identification

Fisher (2005) - The following character combination differentiates berlita from all its congeners: scrobe absent, fused frontal carinae projecting perpendicular to the plane of the clypeus, expanding apically, not forming a thin lamellae: propodeal angle without acute teeth or spines: anterior margin of petiole concave when viewed from above.

The African species of Discothyrea fall into two groups: (1) those with the clypeo-frontal fusion flat topped and broad and with a depressed scrobe region, and (2) those in which the process forms a simple convex or angular vertical plate and lack a depressed scrobe region (Brown 1958.) The Discothyrea of Madagascar belong to the first group. D. berlita is most similar to those in the second group, but is distinct in that the vertical plate does not form a thin lamella, but is expanded apically.

Distribution

Distribution based on Regional Taxon Lists

Malagasy Region: Mauritius (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.

  • berlita. Discothyrea berlita Fisher, 2005: 659, figs. 1 – 4 (w.) MAURITIUS.

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

Description

Worker

HL 0.57, HW 0.52, CI 91, SL 0.36, SI 70, LS4 0.08, LT4 0.43, WL 0.64, IGR 0.19.

Form of head, mandibles, and body as shown in figures. Antennae 10-segmented: medium segments extremely short and not distinct when viewed with less than 100X magnification; scape expanded apically, reaching mid-point of head. Eyes with 2 or 3 facets. Without depressed scrobal area. Palpal segmentation requires dissection and thus was not determined. Mandible masiticatory margin concave, with two teeth, sharp apical tooth and smaller acute basal tooth. Propodeal angle without teeth or acute angles; declivitous face of propodeum concave. Petiole thick, with lateral margins on anterior face; anterior margin concave when viewed from above. Petiole with distinct convex subpetiolar process. Abdominal segment III longer than broad.

Head and mesosoma densely punctulate; petiole sculptured as mesosoma, abdominal segment III with sparse punctures; punctures evanescent on abdominal segment IV. Integument generally opaque, except shiny for impunctate areas of metasoma.

Body, including mandible and appendages, covered with dense fine, very short whitish decumbent pubescence, becoming sparse on abdominal segment III, and dense and nearly erect on abdominal segment IV.

Color testaceous red.

Type Material

Holotype: worker. Mauritius: Le Pouce Mt., Moka Range, 20°11’55”S, 057°31’44”E, 750 m. closed vegetation, 25 May 2005 (coll. B. L. Fisher et. Al.) Collection code: BLF12148, specimen code: CASENT0007016 (CASC).

Etymology

The specific name is an arbitrary combination, to be treated as a noun in apposition.

References