Lasius vostochni

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Lasius vostochni
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. vostochni
Binomial name
Lasius vostochni
Seifert, 2020

Lasius vostochni Holotype worker antweb1041456 p.jpg

Lasius vostochni Holotype worker antweb1041456 d2.jpg

Specimen Labels

A L. vostochni sample from the southern Sikhote-Alin range was collected on a sandy river terrace within an area of dense woodland and a South Baikal collection was found under a stone in a Pinus steppe forest.

Identification

Seifert (2020) - Differs from its sibling species Lasius niger by a combination of more numerous metapleural setae, less numerous scape setae, less dense clypeal pubescence and a slightly longer terminal maxillary palp segment.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Palaearctic Region: Russian Federation (type locality).

Distribution based on AntMaps

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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.
pChart

Biology

Castes

Worker

Images from AntWeb

Lasius vostochni antweb1041456 h 2 high.jpgLasius vostochni Holotype worker antweb1041456 d3.jpgLasius vostochni Holotype worker antweb1041456 p2.jpg
Holotype of Lasius vostochniWorker. Specimen code antweb1041456. Photographer Roland Schultz, uploaded by California Academy of Sciences. Owned by SMNG, Görlitz, Germany.

Nomenclature

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

  • vostochni. Lasius vostochni Seifert, 2020: 63, figs. 51-52 (w.) RUSSIA.

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

Description

Worker

Absolute size rather small (CS 826 µm). Scape length index rather small (SL/CS900 0.961), maxillary palp length index comparably large (MP6/CS900 0.192). Eye large (EYE/CS900 0.252). Number of mandibular dents not recordable in the available material but most probably similar to situation in Lasius niger. Clypeal pubescence rather dense (sqPDCL900 3.92). Pronotal setae short (PnHL/ CS900 0.128). Setae number on dorsum of scape rather low (nSc900 6.1) but high on extensor profile of hind tibia and metapleuron below propodeal spiracle (nHT900 14.3, nSt900 8.0). Coloration: Head, gaster, petiole, coxae, femora and tibiae dark brown; mesosoma sometimes a little lighter; mandibles, scape, trochanter and tibiofemoral joint region pale yellowish-brown.

See table 6 in Seifert 2020 for additional morphometrics. The abbreviated names of various quantitative data shown above are defined here: Seifert 2020 Lasius characters.

Type Material

Holotype plus 4 paratype workers on the same pin labelled ”RUS: Ussuri: 42.97N, 133.52E, 160 m; Krivaya-Tal, Flussterrasse, Sandboden L. Kanter 1999.09.07-43a; 2 paratype workers labelled ”RUS: 51.3528°N, 106.4800°E Gusinoosersk-4W, 604 m Pinus steppe forest under stone I.Antonov 2009.07.11-145“; depository Staatliches Museum für Naturkunde Görlitz.

Etymology

Derived from the Russian word восточний, meaning ”eastern“ and referring to the geographic range that is east of the range of the sister species Lasius niger.

References