Myrmica ravasinii

The type specimen was collected from under a stone.

Identification
M. ravasinii belongs to the schencki species group and is one of the most peculiar Myrmica species outside of the Himalaya, China and SE Asia. Its has the narrowest frons among all known Myrmica (mean FI 0.17) and an extraordinarily enlarged lobe on the scape bend that well distinguish it from any other known Myrmica worldwide. It also has a block-shaped petiole in profile with a short peduncle, long spines, big size and strong petiolar rugosity. Its males well differ from those of the other species of the schencki-group (except M. caucasicola) by the presence of long erect hairs on the scape, tibiae and tarsi. (Radchenko and Elmes 2010)

Key to Myrmica of West Europe and North Africa

Distribution based on Regional Taxon Lists
Palaearctic Region: Albania, Armenia, Georgia, Greece, Turkey.

Biology
Myrmica ravasinii is closely related to Myrmica pelops. The geographical range seems to be restricted to the Balkans and Asia Minor between 38. 42N and 20. 43 E. The main habitat is light forest, usually with Pinus, rarely dense pine forest. The elevation of the sites ranged from 800 to 1800 m, with the majority between 1200 and 1800 m. (Seifert 2003b)

Radchenko and Elmes (2010) - M. ravasinii is a semi-xerophilous species. The regions where it lives are very hot in summer therefore it is a mountain species usually living between 800 and 1800 m. Generally, it lives in fairly open forests (oak, fir, pine), where presumably it benefits from warmth in spring but shade in summer, though occasionally it has been found on mountains meadows. In very dry mountains it is often associated with the edges of small gullies where the sub-soil may be a little moist. Nests are built in the soil and in more shaded places it may live under stones. In southwest Turkey we found sexuals in nests in mid August, and Arakelyan (1989) found them in Armenia in a nest on 30th of August, so nuptial flights probably occur August-September.

Castes
Workers, queens and males are described.

Nomenclature

 *  ravasinii. Myrmica ravasinii Finzi, 1923: 2, fig. (w.) ALBANIA. Arakelian, 1989: 734 (q.m.). See also: Finzi, 1926: 112; Seifert, 2003b: 150; Radchenko, Elmes & Alicata, 2006: 519; Radchenko & Elmes, 2010: 223.

Etymology
Radchenko and Elmes (2010) - named for Prof. Carlo Ravasini (1874-1959) of Trieste, a doctor (urologist) and amateur coleopterologist who made the 1923 Ravasini-Lona expedition to Albania; they made their ant collection available to Finzi.