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Image of Tetramorium nassonowii Forel 1892
Unresolved name

Tetramorium nassonowii Forel 1892

Taxonomic History

provided by Antweb
Tetramorium (Xiphomyrmex) nassonowii Forel, 1892l PDF: 521 (w.) MADAGASCAR. Malagasy. Primary type information: MADAGASCAR, Antananarivo (Province central de Madagascar), Andrangoloaka, 47.27729°E, 18.22198 S, coll. Sikora; CASENT0101289; MHNG AntCat AntWiki

Taxonomic history

Lectotype designation: Hita Garcia & Fisher, 2014c PDF: 121.[Misspelled as nassonovi by Emery, 1924f PDF: 287.].Combination in Xiphomyrmex: Wheeler, 1922: 1031.Junior synonym of Tetramorium schaufussii: Bolton, 1979 PDF: 137; Bolton, 1995b: 411.Status as species: Wheeler, 1922: 1031; Emery, 1924f PDF: 287; Hita Garcia & Fisher, 2014c PDF: 121 (redescription).
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California Academy of Sciences
bibliographic citation
AntWeb. Version 8.45.1. California Academy of Science, online at https://www.antweb.org. Accessed 15 December 2022.
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Description

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Head clearly longer than wide (CI 90–92); posterior head margin weakly concave. Anterior clypeal margin with distinct median impression. Frontal carinae weakly to moderately developed, moderately raised, diverging posteriorly, and usually fading out halfway between posterior eye margin and posterior head margin or approaching posterior head margin. Antennal scrobes present but weak, shallow and without clear and distinct posterior and ventral margins. Antennal scapes short, not reaching posterior head margin (SI 70–74). Eyes moderate to large (OI 23–25). Mesosomal outline in profile flat to weakly convex, comparatively low and long (LMI 36–39), weakly to moderately marginate from lateral to dorsal mesosoma; promesonotal suture absent; metanotal groove weakly developed or absent. Propodeal spines reduced to very short teeth (PSLI 7–11), propodeal lobes short, triangular, and blunt or acute, usually longer than propodeal spines, rarely as long as propodeal spines, spines and lobes not strongly inclined towards each other. Petiolar node rounded nodiform, in profile around 1.2 to 1.4 times higher than long (LPeI 72–81), anterior and posterior faces not parallel, anterodorsal and posterodorsal margins situated at about same height, petiolar dorsum distinctly convex; node in dorsal view weakly longer than wide (DPeI 92–96), in dorsal view pronotum between 2.5 to 2.8 times wider than petiolar node (PeNI 36–40). Postpetiole in profile globular, approximately 1.2 to 1.3 times higher than long (LPpI 75–82); in dorsal view around 1.2 to 1.3 times wider than long (DPpI 122–134), pronotum between 1.8 to 2.0 times wider than postpetiole (PpNI 50–55). Postpetiole in profile appearing more or less of same volume as petiolar node, postpetiole in dorsal view around 1.3 to 1.5 times wider than petiolar node (PPI 130–145). Mandibles unsculptured, smooth, and shiny; clypeus weakly longitudinally rugulose with three to seven rugulae, rugulae often interrupted or irregularly shaped, median area often weakly sculptured, median ruga usually absent or mostly reduced, very rarely fully developed; cephalic dorsum between frontal carinae irregularly longitudinally rugose/rugulose with six to nine rugae/rugulae; rugae/rugulae running from posterior clypeal margin to posterior head margin, often meandering, broken or with cross-meshes; scrobal area mostly unsculptured and laterally merging with surrounding reticulate-rugose to longitudinally rugose sculpture present on lateral head; ground sculpture on head weak to absent. Dorsum of mesosoma irregularly longitudinally rugose to reticulate-rugose, lateral mesosoma mostly irregularly longitudinally rugose; ground sculpture on mesosoma weak to absent. Forecoxae mainly unsculptured, smooth and shining. Waist segments and gaster unsculptured, smooth, and shining. Dorsum of head with several pairs of long, fine, standing hairs; dorsum of mesosoma with at least six or seven pairs of long, standing hairs ranging from anterior pronotum to posterior mesonotum, propodeum without long, standing pilosity; petiole with one pair and postpetiole with one or two pairs; first gastral tergite with short, scarce, appressed pubescence in combination with scattered, long, standing hairs. Anterior edges of antennal scapes and dorsal (outer) surfaces of hind tibiae with appressed to decumbent hairs. Body uniformly light brown to dark brown colour, appendages often lighter.
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Francisco Hita Garcia, Brian L. Fisher
bibliographic citation
Hita Garcia F, Fisher B (2014) The hyper-diverse ant genus Tetramorium Mayr (Hymenoptera, Formicidae) in the Malagasy region taxonomic revision of the T. naganum, T. plesiarum, T. schaufussii, and T. severini species groups ZooKeys 413: 1–170
author
Francisco Hita Garcia
author
Brian L. Fisher
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Distribution

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Tetramorium nassonowii is distributed in the montane rainforests and rainforest belt of eastern Madagascar (Fig. 65) at altitudes ranging from 425 to 1700 m, although it is predominantly found in montane rainforests situated higher than 1000 m. Also, based on the available collection data, it seems that Tetramorium nassonowii inhabits leaf litter or the ground.
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cc-by-3.0
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Francisco Hita Garcia, Brian L. Fisher
bibliographic citation
Hita Garcia F, Fisher B (2014) The hyper-diverse ant genus Tetramorium Mayr (Hymenoptera, Formicidae) in the Malagasy region taxonomic revision of the T. naganum, T. plesiarum, T. schaufussii, and T. severini species groups ZooKeys 413: 1–170
author
Francisco Hita Garcia
author
Brian L. Fisher
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