Meranoplus rothneyi

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Meranoplus rothneyi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Meranoplus
Species: M. rothneyi
Binomial name
Meranoplus rothneyi
Forel, 1902

Meranoplus rothneyi casent0217859 p 1 high.jpg

Meranoplus rothneyi casent0217859 d 1 high.jpg

Specimen Labels

Identification

Schödl (1998) - This little species is generally well characterized by the promesonotal shield being provided only with a pair of posterior stout spines. In addition with the shape of the head and the clypeal traits it may be placed close to the widely distributed M. bicolor. Nevertheless, it is unmistakable with any congener throughout the range of its distribution.

The type material differs slightly from the remaining studied material from northern samples, the dorsum being less distinctly reticulate, the gaster being distinctly shagreened, and the lateral margins of promesonotum being margined conspicuously lamellate. The disjunct distribution (of the material, as studied yet) might indicate that there are two species. Nonetheless the studied material is here treated as one species, since differences are found among northern populations as well. Further material, particularly from the wide distribution gap is needed to determine, whether M. rothneyi consists of more than one species.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Oriental Region: Bhutan, India (type locality), Nepal.


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.

  • rothneyi. Meranoplus rothneyi Forel, 1902c: 241 (w.) INDIA. See also: Schödl, 1998: 391.

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

Description

Worker

Schödl (1998) - TL: 2.8 - 3.2, HL: 0.65 - 0.8, HW: 0.66 - 73 CI- 90 - 96 SL- 0.49 - 0.55, SI: 73 - 81, PML: 0.5 - 0.55, PW: 0.55 - 0.65, PMI: 1 10 - 130, AL- 6 - 0.73 (10 measured).

Mandibles striate, armed with four teeth. Mid-portion of clypeus oblique, slightly concave and smooth. Anterior clypeal margin produced into a very narrow apron. Mid-portion wun lateral cannulae, which run into short denticles in the antero-lateral comers the denticles conspicuously projecting forward, when viewed from the side. Frontal triangle apparent, partly carinulate. Head above antennal scrobes trapezoid, the lateral sides evenly narrowed towards clypeus; ventral part of head (below the antennal scrobes) much wider than dorsal part, somewhat more rectangular, the genae distinctly protruding when viewed from above. Antennal scrobes smooth, posteriorly occasionally shagreened and with transverse carinulae, the genae distinctly carinate to rugulose. Compound eyes situated well behind middle of lateral sides of head close to the occipital corners. Maximum diameter of eye 0.18 - 0.22, with 11-13 ommatidia in the longest row.

Promesonotum slightly wider than long, overhanging sides of alitrunk laterally and propodeum posteriorly. Lateral margins of promesonotal shield evenly narrowed towards posterior mesonotal corners. At about the level of (invisible) promesonotal suture with a more or less distinct constriction (excavation on each side), followed by a blunt denticle, which may be almost reduced (type material). In that area the lateral margins occasionally lamellate and translucent. Posterior comers of mesonotum produced into stout, posteriorly directed spines of variable size. Propodeum distinctly overhung by the lamella between posterior mesonotal spines. Declivity of propodeum smooth, with few longitudinal rugae or carinulae above. In about middle of its length propodeum provided with two slender, posteriorly projecting lateral spines.

Petiole in lateral view cuneate, in dorsal view the crest a line. Anterior and posterior petiolar faces smooth. Postpetiole nodiform in lateral view. First gastral tergite shagreened (type material), or smooth with a very indistinct shagreening.

Dorsum of head anteriorly longitudinally carinulate to reticulate-rugulose on lateral sides, reticulate posteriorly near occiput, width of meshes ca. 30 - 60 μm, sometimes with a faint secondary shagreening. Promesonotal shield reticulate-rugulose above, the reticulation more developed than on dorsal head, width of meshes ca. 30 - 70 jam. Postpetiole covered with rugae and wrinkles. All dorsal surfaces covered with short and dense, decumbent to suberect pubscence (ca. 80-120 μm) and longer stiff, suberect to erect, outstanding hairs (ca. 150 - 250 μm). Colour brightly ferrugineous (type material; probably callow worker) to darker brown, sometimes slightly bicoloured, with the gaster darker than remaining body parts.

Type Material

Schödl (1998) - In Forel's collection (Musee d'Histoire Naturelle Genève) this species is not present. I worker (number of syntypes unknown) (Naturhistorisches Museum, Basel) is here fixed as lectotype: "M. Rothneyi type Forel Cochin Indes (Rothney) \ Sammlung Dr. F. Santschi Kairouan"; 1 paralectotype (Naturhistorisches Museum Wien, Vienna): "Rothneyi Forel, Type. \ Cochinchina [!sic; typing error] CoIl. G.Mayr \ M. Rothneyi <;> Forel Cochin (Inde (Rothney)". One (?) syntype worker, "Indien (Cochin) Rothney \ Meranoplus rothneyi Forel \ Paratypus \ Forel det. 1922 [!] \ Zool. Mus. Berlin" (Berlin Museum für Naturkunde der Humboldt-Universität).

References

  • Forel, A. 1902c. Myrmicinae nouveaux de l'Inde et de Ceylan. Rev. Suisse Zool. 10: 165-249 (page 241, worker described)
  • Schödl, S. 1998. Taxonomic revision of Oriental Meranoplus F. Smith, 1853 (Insecta: Hymenoptera: Formicidae: Myrmicinae). Ann. Naturhist. Mus. Wien. B. Bot. Zool. 100: 361-394 (page 391, see also)