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Lasius nigrescens
| Lasius nigrescens | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Formicinae |
| Tribe: | Lasiini |
| Genus: | Lasius |
| Section: | niger clade |
| Species group: | niger |
| Species: | L. nigrescens |
| Binomial name | |
| Lasius nigrescens Stitz, 1930
| |
This species is only known from the alate gynes of the type series.
Identification
Seifert (2020) - The type series of gynes is the only collection of L. nigrescens. Considering the correlations that usually exist between gyne and worker morphology in Lasius, the worker of this species is expected to have a long scape (SL/CS900 perhaps 1.06), an average head length index (CL/CW900 perhaps 1.07), and numerous setae on underside of head and hind tibiae.
Distribution
Distribution based on Regional Taxon Lists
Palaearctic Region: Russian Federation (type locality).
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
Queen
Images from AntWeb
  
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| Lectotype of Lasius nigrescens. Queen (alate/dealate). Specimen code antweb1008433. Photographer Roland Schultz, uploaded by California Academy of Sciences. | Owned by ZMHB, Berlin, Germany. |
       
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| Paratype of Lasius nigrescens. Queen (alate/dealate). Specimen code antweb1008434. Photographer Roland Schultz, uploaded by California Academy of Sciences. | Owned by ZMHB, Berlin, Germany. |
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- nigrescens. Lasius emarginatus var. nigrescens Stitz, 1930: 240 (q.) RUSSIA. Junior synonym of niger: Wilson, 1955a: 60. Revived from synonymy and raised to species: Seifert, 1992b: 38.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Description
Queen
Seifert (2020) - I present here the data of 5 type gynes: CS 1411 ± 17 [1392, 1432]; CL/ CW 0.883 ± 0.010 [0.872, 0.896]; SL/CS 0.870 ± 0.010 [0.856, 0.879]; nGu 32.0 ± 5.6 [27, 40], nOcc 29.1 ± 1.6 [27, 31]; nGen 15.2 ± 4.2 [12.5, 20.0]; GuHL/CS 0.112 ± 0.005 [0.107, 0.16]; PnHL/CS 0.147 ±0.005 [0.143, 0.152]; sqPDCL 4.68 ± 0.17 [4.49, 4.89]; ML/CS 2.168 ± 0.036 [2.130, 2.223]; MH/CS 1.146 ± 0.026 [1.122, 1.189]; MW/ CS 1.329 ± 0.006 [1.322, 1.333].
The abbreviated names of various quantitative data shown above are defined here: Seifert 2020 Lasius characters.
Type Material
Seifert (2020) - Lectotype (des. E.O. Wilson) and 4 paralectotype gynes labelled ”West-Pamir, VII-IX 28, leg. Reinig, Maz, 3800 m, 15.-19. VIII“; depository Berlin Museum für Naturkunde der Humboldt-Universität.
References
- Seifert, B. 1992b. A taxonomic revision of the Palaearctic members of the ant subgenus Lasius s.str. (Hymenoptera: Formicidae). Abh. Ber. Naturkundemus. Görlitz 66(5): 1-67 (page 38, Revived from synonymy, and raised to species)
- Seifert, B. 2020. A taxonomic revision of the Palaearctic members of the subgenus Lasius s.str. (Hymenoptera, Formicidae). Soil Organisms 92(1): 15-86 (doi:10.25674/so92iss1pp15).
- Stitz, H. 1930a. Entomologische Ergebnisse der Deutsch-Russischen Alai-Pamir Expedition 1928 (1). 5. Hymenoptera III. Formicidae. Mitt. Zool. Mus. Berl. 16: 238-240 (page 240, queen described)
- Wilson, E. O. 1955a. A monographic revision of the ant genus Lasius. Bulletin of the Museum of Comparative Zoology.113:1-201.