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Messor striatifrons
| Messor striatifrons | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Stenammini |
| Genus: | Messor |
| Species: | M. striatifrons |
| Binomial name | |
| Messor striatifrons Stitz, 1923
| |
Identification
A fairly distinctive member of the group of species centering on Messor capensis, striatifrons is characterized by its relatively long low propodeum and convex head sides. The shape of the head is not duplicated in other African species but Messor denticornis has a similarly proportioned propodeum. However, in this last-named species the eyes are larger, with a range of 0.21-02.5 x HW. (Bolton 1982)
Keys including this Species
Distribution
Latitudinal Distribution Pattern
Latitudinal Range: -25.6746° to -34.09517°.
| North Temperate |
North Subtropical |
Tropical | South Subtropical |
South Temperate |
- Source: AntMaps
Distribution based on Regional Taxon Lists
Afrotropical Region: Namibia (type locality), South Africa.
Distribution based on AntMaps
Distribution based on AntWeb specimens
Check data from AntWeb
Countries Occupied
| Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species. |
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Estimated Abundance
| Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species. |
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Biology
Castes
Known only from the worker caste.
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- striatifrons. Messor denticornis var. striatifrons Stitz, 1923: 149 (w.) NAMIBIA.
- Type-material: 6 syntype workers.
- Type-locality: Namibia (“German Southwest Africa”): (no further data) (Scheben).
- Type-depository: MNHU.
- Status as species: Bolton, 1982: 353 (redescription); Bolton, 1995b: 257.
- Distribution: Namibia, South Africa.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Description
Worker
Bolton (1982) - Medium to Large, HW 2.84- > 3.75.
Anterior clypeal margin usually shallowly convex medially but sometimes a weak central indentation of the margin is present. With the head in full-face view the sides convex. Generally the convexity is distinct in larger workers but tends to be less marked in sma!ler individuals; infrequently the reverse is true and medium sized workers show the convexity more strongly than larger specimens. Occipital margin shallowly indented medially, the indentation best developed in large workers and slowly disappearing with decrease in size. Within the HW range 2.84-3.76 the maximum diameter of the eye is 0.52--0.68, about 0.16--0.18 x HW, and the CI range is 104-114. Propodeum in profile relatively long and low, usually rounded at the junction of dorsum and declivity but quite frequently right-angled or projecting into a broad short tooth which is really no more than a projection of the right-angle. Dorsum of head sculptured with extremely fine dense longitudinal rugulae which in the strongest sculptured individuals are very close packed. Spaces between the rugulae with fairly conspicuous ground-sculpture of fine punctures. In medium sized workers, and quite frequently in maximum sized workers also, the sculpture on the dorsal head is modified by a weakening of the rugular component and an intensification of the punctures, so that in some the rugular component is supressed and the head appears reticulate-punctate everywhere or almost everywhere. Dorsal alitrunk rugulose, the direction of the sculpture variable but usually stronger on the propodeum than elsewhere. First gastral tergite unsculptured or at most with the faint superficial patterning so commonly seen in this genus. All dorsal surfaces of head and body with numerous standing hairs; evenly distributed hairs conspicuous on first gastral tergite. Colour medium to dark brown, commonly uniform but often with the gaster darker, blackish brown.
References
- Bolton, B. 1982. Afrotropical species of the myrmecine ant genera Cardiocondyla, Leptothorax, Melissotarsus, Messor and Cataulacus (Formicidae). Bulletin of the British Museum (Natural History). Entomology, 46: 307-370. (page 353, Raised to species)
- Stitz, H. 1923. Hymenoptera, VII. Formicidae. Beitr. Kennt. Land- Süsswasserfauna Dtsch.-Südwestafr. 2: 143-167 (page 149, worker described)
References based on Global Ant Biodiversity Informatics
- Bolton B. 1982. Afrotropical species of the myrmicine ant genera Cardiocondyla, Leptothorax, Melissotarsus, Messor and Cataulacus (Formicidae). Bulletin of the British Museum (Natural History). Entomology 45: 307-370.
- Stitz H. 1923. Hymenoptera, VII. Formicidae. Beiträge zur Kenntnis der Land- und Süsswasserfauna Deutsch-Südwestafrikas 2: 143-167.