Lasius orientalis

Lasius orientalis
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Formicidae
Subfamily:	Formicinae
Tribe:	Lasiini
Genus:	Lasius
Section:	niger clade
Species group:	fuliginosus
Species:	L. orientalis
Binomial name
	Lasius orientalis; Karavaiev, 1912 Specimen Labels
Synonyms
	Lasius ouchii Teranishi, 1940; Lasius teranishii Wheeler, W.M., 1928;

Common Name

Teranishi-ke-ari
Language:	Japanese
Notes:	as Lasius teranishii

This species is distributed in mountainous areas and is a temporary parasite of Lasius flavus. Nuptial flights take place during July (Yamauchi et al., 1986; Japanese Ant Image Database).

At a Glance

• Temporary parasite

Identification

Within the subgenus distinctive by its flattened antennal scape and the very thick, low petiolar scale (in profile), which is gradually widened to the apex when seen in front or from behind.

Keys including this Species

Distribution

Radchenko (2005) - Southern part of Russian Far East (Amursky and Primorsky Regions, Islands Shikotan and Kunashir), Korean Peninsula, Japan (Hokkaido, northern and central Honshu).

Latitudinal Distribution Pattern

Latitudinal Range: 38.22444444° to 36.533333°.


North Temperate	North Subtropical	Tropical	South Subtropical	South Temperate

Source: AntMaps

Distribution based on Regional Taxon Lists

Palaearctic Region: Democratic Peoples Republic of Korea, Japan, Republic of Korea (type locality), Russian Federation.

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.

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.

Biology

Flight Period

						X
Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec

Notes: Japan.

Check details at Worldwide Ant Nuptial Flights Data, AntNupTracker and AntKeeping.

Explore: Show all Flight Month data or Search these data. See also a list of all data tables or learn how data is managed.

Castes


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Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

orientalis. Lasius fuliginosus var. orientalis Karavaiev, 1912b: 586 (w.) KOREA. Junior synonym of fuliginosus: Wilson, 1955a: 138; of nipponensis: Espadaler, Akino & Terayama, 2002: 340. Revived from synonymy, raised to species and senior synonym of ouchii, teranishii: Radchenko, 2005a: 87.
teranishii. Lasius (Chthonolasius) teranishii Wheeler, W.M. 1928d: 120 (q.) JAPAN. Yamauchi & Hayashida, 1968: 399 (w.m.). Combination in L. (Dendrolasius): Wilson, 1955a: 146. Senior synonym of ouchii: Wilson, 1955a: 146. Junior synonym of orientalis: Radchenko, 2005a: 87. See also: Yamauchi, 1979: 174; Kupyanskaya, 1989: 786.
ouchii. Lasius (Chthonolasius) ouchii Teranishi, 1940: 76 (q.) JAPAN. Junior synonym of teranishii: Morisita, 1945: 23; of orientalis: Radchenko: 2005: 87..

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

Description

Worker

Radchenko (2005) - (neotype in brackets) workers from the nest of the neotype specimen (n = 16) [mean data are in square brackets]: HL1 = 1.06-1.26 (1.22) [1.17], HL2 = 1.12-1.33 (1.32) [1.25], HW1 = 1.04-1.23 (1.19) [1.15], HW2 = 0.70-0.80 (0.77) [0.75], SL = 1.01-1.12 (1.09) [1.06], OL = 0.18-0.27 (0.25) [0.23], AL = 1.18-1.44 (1.34) [1.32]; CI = 0.96-1.00 (0.98) [0.98], CLI = 1.05-1.09 (1.08) [1.07], CWI = 1.49-1.57 (1.55) [1.54], SI1 = 0.88-0.95 (0.90) [0.90], SI2 = 0.89-0.96 (0.92) [0.92], OI = 0.18-0.22 (0.21) [0.20].

Petiolar scale (seen in proflle) thick, low, not narrowing to the top; when seen in front or from behind, it gradually widens to the top; scape distinctly flattened, ratio of min/max diameters of the scape ≤ 0.5; head with convex sides, gradually and slightly narrowing anteriorly, with emarginate occipital margin; scape and legs with numerous short subdecumbent hairs; promesonotal dorsum and occipital margin with a few quite short standing hairs.

Queen

Radchenko (2005) - Petiolar scale (seen in profile) thick, low, not narrowing to the top; when seen in front or from behind it gradually widens to the top; scape and legs, including the first tarsal joint, remarkably flattened, ratio of min/max diameters of scape and hind tibiae ≤ 0.4; head with emarginate occipital margin, but not cordiform and at most slightly wider than long; legs and scape with very dense decumbent pubescence; head, alitrunk and gaster with very dense decumbent pubescence; alitrunk dorsum with sparse, short erect hairs.

Type Material

Radchenko (2005) -Neotype worker (designated here, see below), “Buhta Gaidamak, No. 3196, 2l.V.1900, leg. P. Shmidt”, “Lasius fuliginosus var. orientalis Karaw. Typus” (both labels hand written by Karawajew) (Institute of Zoology of the Ukranian National Academy of Sciences).

References

Espadaler, X.; Akino, T.; Terayama, M. 2002 [2001]. Taxonomic status of the ant Lasius nipponensis Forel, 1912 (Hymenoptera, Formicidae). Nouv. Rev. Entomol. 18: 335-341 (page 340, Junior synonym of nipponensis)
Karavaiev, V. 1912b. Ameisen aus dem paläarktischen Faunengebiete. Rus. Entomol. Obozr. 12: 581-596 (page 586, worker described)
Radchenko, A. 2005a. A review of the ants of the genus Lasius Fabricius, 1804, subgenus Dendrolasius Ruzsky, 1912 (Hymenoptera: Formicidae) from East Palearctic. Annales Zoologici (Warszawa) 55(1):83-94. (page 87, status revived, new status; senior synonym of teranishii, and ouchii)
Radchenko, A.G., Fisher, B.L., Esteves, F.A., Martynova, E.V., Bazhenova, T.N., Lasarenko, S.N. 2023. Ant type specimens (Hymenoptera, Formicidae) in the collection of Volodymyr Opanasovych Karawajew. Communication 1. Dorylinae, Poneromorpha and Pseudomyrmecinae. Zootaxa, 5244(1), 1–32 (doi:10.11646/zootaxa.5244.1.1).
Wilson, E. O. 1955a. A monographic revision of the ant genus Lasius. Bulletin of the Museum of Comparative Zoology 113: 1-201 (page 138, Junior synonym of fuliginosus)

References based on Global Ant Biodiversity Informatics

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