Aphaenogaster semipolita

Identification
A member of the A. testaceopilosa group. Boer (2013) - The workers of A. semipolita resemble Aphaenogaster spinosa because of their shine, but the two are easily separated by the characters provided in the key. These species are examples of allopatric speciation. The glossy to shiny gaster of the gyne is a remarkable character. The nearly smooth and shiny gaster of the male is also a distinct characteristic.


 * Key to European Aphaenogaster workers

Distribution based on Regional Taxon Lists
Palaearctic Region: Georgia, Italy.

Nomenclature

 *  semipolita. Myrmica semipolita Nylander, 1856b: 86 (w.) ITALY. Emery, 1878b: 53 (m.); André, 1883b: 370 (q.). Combination in Aphaenogaster: Roger, 1863b: 29. Subspecies of testaceopilosa: Emery, 1878b: 53; Forel, 1910a: 24; Finzi, 1930d: 312. Revived status as species: Santschi, 1933c: 390.

Description
Boer (2013):

Worker
Rugulose sculpture in general weak. Punctation on mesosoma and head in full-face view, occasionally(!) weak or absent. Lateral sides of mesosoma with longitudinal rugulae. Dorsal side of mesosoma without rugulae, weakly rugulose or with distinct transverse rugulae on propodeum. Head with longitudinal rugulae (not always) on frontal side with some cross connections. Dorsal side of petiolar node weakly punctate or without punctation. Dorsal side of postpetiole with longitudinal costulae. Dorsal side of first gastral tergite largerly smooth, microstriae limited to the base: 0–30% of the surface. Lateral sides of petioles nearly smooth to smooth. Whole body with some shine, especially temple, occiput, ventral side of head, legs and gaster. Underside of head, posterior side of propodeum, beneath the propodeal spines and lateral sides of gaster shiny. Petioles shiny. Dorsal side of gaster wax glossy to glossy. Antennal club 4-segmented. In lateral view setae on head and mesoma of equal length. Petiole equal in height to postpetiole or somewhat higher.

Measurements (n = 26). CI 70–83 (77); CL 1.11–1.69 (1.41) mm; CW 0.95–1.30 (1.08) mm; PHI 26–35 (32); PI 68–90 (82); PPPI 46–54 (51); PSI 136–188 (154); PSLWI 81–150 (104); PWI 20–25 (-43) (23); RPH 131–152 (140); RPSI 25–56 (35); SI 134–150 (143); SI/CI: 168–206 (186); SL 1.34–1.82 (1.55) mm; SPD 1–3 (1.7); SPL 1–5 (3.4).

Queen
Longitudinal rugulae on clypeus, head and mesoscutum. Rugulae on lateral sides weak. Transverse rugulae on pronotum, propodeum, scutellum and posterior sides of the petioles. Punctation on head, very weak on mesosoma and petioles. Less than ten transverse microstriae near base of first gastral tergite. Anterior side of petioles smooth. Mesosoma, petioles and gaster satin to glossy. Antennal club 4-segmented. Scutellum rises weakly above mesoscutum and does not bend over metanotum.

Measurements (n = 2). CI 88–93; CL 1.58–1.64 mm; CW 1.44–1.46 mm; PHI 40–43; PI 69–71; PPPI 71–79; PSI 169–179; PSLWI 100–113; PWI 29–33; RPH 130–139; RPSI 44–46; SI 111; SI/CI 119–126; SL 1.60–1.62 mm; SPD 1; SPL 5–5.5.

Male
Rugulae are absent on whole body, except longitudinal rugulae on lateral sides of propodeum. Whole body punctate, weak on propopeum and petioles. The punctation on mesonotum is ranked as a fine striated sculpture. Dorsal side of the first gastral tergite with very weak microreticulation, nearly smooth, without microstriae. Head and mesonotum soft glossy, dorsal side of gaster glossy, propodeum with transverse striation, glossy. Clypeus without rugulae or punctation, soft glossy. Antennal club 5-segmented. Pubescence on scape and hind tibia appressed to decumbent, their length shorter than diameter of scape/tibia. Scutellum slightly erect above mesoscutum, partly or not bent over metanotum. Head without frontal midline. Mandibles with one large apical tooth, tooth 2 and or 3 relatively large, rest of masticatory margin contains 4 denticles. A weak groove between the two knobs at the posterior side of the propodeum. Corner of terminal end of propodeum not sharp, not dentate.

Measurements (n = 5). CI 86–93 (91); CL 0.81–0.90 (0.87) mm; CW 0.75–0.84 (0.78) mm; EYI 38–44 (41); OCI 46–48 (47); SL/CL 48–52 (50); SL 0.39–0.48 (43) mm.