Meranoplus crassispina

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Meranoplus crassispina
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Meranoplus
Species: M. crassispina
Binomial name
Meranoplus crassispina
Schödl, 2007

Meranoplus crassispina p.jpg

Between the known localities in Central and north-western Australia a wide gap is present, which most likely is due to insufficient collecting.

Identification

Schödl (2007) - This taxon in many respects resembles Meranoplus deserticola and obviously is a sibling. However, the broader frontal carinae, the outline of the dorsal shield and, in particular the distinctly differently structured propodeal spines separate crassispina well from the former.

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

Worker

Nomenclature

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

  • crassispina. Meranoplus crassispina Schödl, 2007: 393, figs. 24, 25, 64, 85 (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

Holotype. TL 5.60, HL 1.30, HW 1.48, FC 1.23, CS 1.39, SL 0.78, SI1 53, SI2 56, PML 1.13, PW 1.33, PMD 1.50, PMI2 113, ML 1.50, PTLL 0.43, PTLH 0.60, PTDW 0.50, PPLL 0.35, PPLH 0.65, PPI 54, PPDW 0.48, PT/PP 105.26.

Mandible with four teeth. Clypeus carinulate, in full face view bluntly bidentate, scarcely surpassing anterolateral frontal projections. Frontal carinae broad and distinctly sinuately narrowed towards clypeus (FI 120). Head wider than long (CI 113), preoccipital margin very shallowly concave only. Antennal scrobe distinctly surpassing middle of lateral sides of head, glossy with additional distinct transverse carinulae at rear, merging very weakly defined into posterior section of head. Genae and ventrolateral sides of head carinate, preoccipital corners reticulate. Eyes moderately sized (EL 0.28, REL 0.21, with 16 ommatidia in the longest row), situated slightly in front of lateral sides of head, dorsal ocular margin touching ventral scrobal margin. Frons rather evenly longitudinally costulate, head only posteriorly reticulate. Promesonotal shield vaulted, with evenly convex profile, moderately wider than long (PMI 118), lateral sides narrowly translucently margined.

Pronotal margins almost parallel-sided, with distinct indentation at level of promesonotal suture, with the anterior mesonotal projections distinctly defined. Promesonotal shield coarsely rugose, with occasional cross meshes only. Propodeal declivity partly overhung by posterior mesonotal margin. Propodeal spines in relation to body size very long (PSL 0.63), situated high above middle of length of declivity, massively developed, straight, apically acute and distinctly diverging when seen from above.

Petiole in lateral view broadly triangular (PTI 71), with anterior face straight, meeting convex posterior face in a crest. Postpetiole elongately nodiform with a rather large anteroventral tooth.

Gaster entirely microreticulate. Surface covered with evenly distributed pilosity existing of short decumbent and long, more or less erect outstanding stiff hairs.

(n = 4). TL 5.20-5.60, HL 1.28-1.32, HW 1.48-1.50, FC 1.21-1.23, FI 120-122, CI 113-118, CS 1.39-1.40, SL 0.78-0.80, SI1 53, SI2 55-58, PML 1.05-1.25, PW 1.25-1.38, PMI 110-119, PMD 1.43-1.53, PMI2 111-114, ML 1.30-1.50, PSL 0.58-0.65, PTLL 0.38-0.43, PTLH 0.55-0.60, PTI 63-71, PTDW 0.46-0.60, PPLL 0.34-0.43, PPLH 0.6-0.7, PPI 54-61, PPDW 0.45-0.58, PT/PP 103-105, EL 0.27-0.31, REL 0.21-0.24, with 15-18 ommatidia in the longest row.

Type Material

Holotype worker, South Australia: 'S. AUST., 5.6 km SSE Mosquito Camp Dam, Crown Point Stn 26°09'28"S 134°30'49"E \ pitfalls 20.-23.Nov 1995 Stony Desert Survey LC05' (South Australian Museum). Paratypes. 12 workers, same data as holotype; 1 worker, '6.8 km WSW Mosquito Camp Dam 26°08'44"S 134°25'56"E \ pitfalls 20.-23.Nov 1995 Stony Desert Survey LC02' (Australian National Insect Collection, SAMA, Naturhistorisches Museum Wien, Vienna).

Etymology

The name refers to the shape of the propodeal spines.

References

  • Schödl, S. 2007. Revision of Australian Meranoplus: the Meranoplus diversus group. Memoirs of the American Entomological Institute. 80:370-424.