Lasius turcicus

Pashaei Rad et al. (2018) found this species in Iran on the ground in moist forest and montane areas with moderate rainfall.

Identification
Seifert (2020) - Morphologically similar to Lasius precursor but differs by larger absolute size, longer scape, smaller postocular distance and larger torulo-clypeal distance. Differences in their natural history are detailed in the biology section of L. precusor.

Distribution
Seifert (2020) - From the Aegean islands Andros (37.83°N, 24.87°E, westernmost site), Kos and Rhodos over Anatolia east to the N Iran (36.8°N, 54.4° E). The southernmost known site is Wadi Barad in Syria (33.58°N, 36.20°E). The altitudinal distribution in West Anatolia ranges from 1 to 1170 m.

Seifert (1992) - Altitudinal records concentrate near sea level but in Anatolia xerothermous steppe and karst habitats above 1000 m are inhabitated. Vertical distribution in whole range: 0-150 m (n = 15), 200-500 m (n=4), 500-1000 m (n=3), 1000-1500 m (n=4) and 1900 m (n= 1). Coastal areas along the Caspian, Black and Mediterranean Seas are obviously very frequently inhabited.

Distribution based on Regional Taxon Lists
Palaearctic Region: Georgia, Greece, Iberian Peninsula, Iran, Russian Federation, Spain, Turkey.

Habitat
Seifert (1992) - The recorded habitats indicate an eurypotent species which occurs in steppes, karst areas, sand dunes, pastures, tree rows, road sides, forest margins and very frequently in urban areas. At low altitudes L. turcicus is often found in more shaded habitats (e. g. city parks and gardens with tree canopy); in regions with cooler macroclimate direct solar insolation of the ground surface is needed.

Biology
Seifert (1992) - Polygynous colonies may develop into huge supercolonies, displacing or exterminating most of the other ant species and getting increasing importance as pest species as reported for the city of Budapest (Van Loon et al. 1990). There it is described as a "very opportunistic species occupying all available nest space and monopolizing virtually all trees for tending and harvesting aphids". A similar, but less extreme situation was observed by the author in the Tiflis Botanical Garden. On another site, a N-exposed steppe slope in a suburb of Tiflis, under nearly every stone moved, nest parts of a big polygynous colony were found. In polygynous colonies the nuptial flight is (perfectly?) reduced and intranidal mating takes place (Van Loon et al. 1990). The same authors reported alate queens inside a polygynous colony not later than 10 July. An alate queen from a (probably monogynous) nest near Kastamonu / Turkey was taken by A. Schulz on 5 July 1989.

Nomenclature

 *  turcicus. Lasius niger st. turcica Santschi, 1921a: 115 (w.q.) TURKEY. Subspecies of alienus: Emery, 1925b: 230; Stärcke, 1944a: 157 (in key). Junior synonym of alienus: Wilson, 1955a: 78 [Repeat of this synonymy in Arakelian, 1994: 117, is ignored.]. Revived from synonymy and raised to species: Seifert, 1992b: 10.

Seifert (2020) - Preliminary investigations of Iranian samples show significant character differences to the Anatolian population. Assessment of the taxonomic status of the former needs a special, more extensive study.

Worker
Seifert (2020) - Body size larger than in sister species Lasius precursor (CS 855 µm). Number of mandibular dents low (MaDe900 7.7). Clypeal pubescence dilute (sqPDCL900 5.34). Pronotal setae rather short (PnHL/CS900 0.127) as long as gular setae (GuHL/ CS900 0.127). Petiole scale in profile view rather thin with an acute dorsal tip. Pubescence hairs on frons rather long (PLF 34.7 µm). Dorsum of scape and hind tibiae without or occasional setae. It differs from Lasius neglectus by larger size, more developed gular pilosity (nGu900 3.96 vs. 2.92, GuHL/CS900 0.127 vs. 0.115) and less developed pilosity on posterior margin of head (nOcc900 6.88 vs. 9.77). For the most significant differences to L. precursor see there and Tab. 3. Coloration: In medium sized specimens head and gaster dark brown, mesosoma often suggested lighter; mandibles, antennae, lateral part of clypeus, tibiae and tarsae light yellowish-brown. Large specimens often show more yellowish-reddish color components on mesosoma and lateral clypeus.

Also see table 2 in Seifert 2020 for additional morphometric measurements, ratios, and functions. Abbreviations given above for measurements, ratios and functions are defined here: Seifert 2020 Lasius characters.

Queen
Seifert (1992) - HL 1230.0±36.1 (9), HW 1380.8±28.8 (9), AL 2533.4±67.1 (9), HL/HW 0.8909±0.0104 (9), SL/HL 0.8612±0.0222 (9), SL/HW 0.7672±0.0204 (9), MH/ML 0.4984±0.0264 (9), PDCL 22.33±7.09 (9), nHS 1.39±1.88 (9), nHHT2.39±2.S5 (9), nBH 13.61±2.37 (9), nUH 6.17±1.32 (9), PNHL 164.2±14.4 (9), UHL l71.7±12.8 (9)

Head: frontal groove fully developed from midocellus to frontal triangle but weakly impressed; mandibles with 7 to 8 dents (7.33 ± 0.50, n = 9), number of genal setae 2.89 ± 1.39 (n = 9). Mesosoma: in lateral view flat. Scale: Always emarginate with an angle of 110-160°, upper corners rounded to angularly rounded. Sides slightly converging dorsadly. Scape: pubescence 30°, relatively smooth, single setae 30-60° and 25-60 µm. Hind tibia: pubescence 30°, few setae of 30-60° and 30-52 µm may be present. Surface characters: overall impression of dorsal head weakly shining, pubescence dense, 25-35° and PLF 35-52µm. In one queen from Turkey (probably from a monogynous nest) dorsal head with well-developed micropunctures of 7-9 µm diameter and ± 13 µm central distance; these punctures are more weakly developed in queens from big polygynous colonies. Color: head, mesosoma and gaster dark brown; scape, mandibles and tibiae yellowish; femora yellowish brown.

Type Material
Seifert (2020) - Lectotype worker on the same pin with a Prenolepis gyne, labelled ”Asie min. Angora G.d.Kerville“, ”Lasius turcicus Sant SANTSCHI det. 1920“, ”lectotype € desig. by E.O.Wilson“, ANTWEB CASENT 0912297; 2 paralectotype workers on another pin labelled ”Asie min. Angora G.d.Kerville)“, ”Lasius turcicus Sant type SANTSCHI det.1920“, ”K. 201“; depository.

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