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Eutetramorium mocquerysi Emery
(Figs 1-3, Map 123)
Eutetramorium mocquerysi Emery , 1899: 281, 2 figs. Lectotype and paralectotype workers, MADAGASCAR: Antongil, 1897-1898 (A. Mocquerys) (MSNG) [examined].
WORKER. TL 9.8-10.4, HL 2.08-2.18, HW 1.82-1.92, CI 86-89, SL 1.40-1.56, SI 76-83, PW 1.36-1.46, WL 2.84-3.04 (6 measured).
Palp formula 4,3. Mandible finely and densely longitudinally costulate. Cephalic dorsum longitudinally coarsely costate medially, the costae diverging posteriorly; spaces between costae with superficial ground sculpture. Sides of head with foveate pits, the spaces between which are densely shagreenate. Similar pits occur near the posterior margin of the dorsum. Eyes about at midlength of head in full-face view, EL 0.40-0.42 (EL/HW 0.21-0.22). Sides of head without projecting setae, but a few short coarse pubescence hairs may be present, appressed or nearly so. Mesotibia and metatibia each with a conspicuous simple spur. MfL 2.28-2.44 (MfL/HW
1.24-1.32). Legs covered with fine superficial reticular sculpture, superimposed upon which are scattered larger, shallow, semi-effaced punctures. Mesonotum in profile abruptly truncated posteriorly, descending almost vertically to the deeply impressed metanotal groove. Mesopleuron with a broad transverse sulcus that is unsculptured or very nearly so. Dorsal surfaces of entire mesosoma, petiole and postpetiole lack standing setae. Side of pronotum and entire dorsum of mesosoma foveate, the surfaces between foveae densely and strongly shagreenate. Propodeal spines long, slender and acute, in profile the spine 3.30-4.00 x longer than the maximum width of the propodeal lobe. Petiole in profile with a very small anteroventral process, spiracle located just anterior of the midlength of the peduncle. Postpetiole node broader than long, its width 0.70-0.74; dorsum of postpetiole shallowly foveate, the foveae less sharply defined than on the pronotum and the spaces between them punctulate-shagreenate. First gastral tergite with minute, superficial reticular patterning, and with scattered, minute, appressed pubescence, without setae. Full adult colour black, with dull brown to reddish brown legs.
QUEEN (gyne). Extreme ergatoid (e.g. CASENT0217042). Indistinguishable from worker without ovarian dissection.
MALE. See genus diagnosis of male above for main features. Smaller than worker, HL 1.44, HW 1.36, CI 94, SL 0.42, SI 31, PW 1.36, WL 2.64, MfL 2.08 (MfL/HW 1.53), EL 0.68 (EL/HW 0.50) (1 measured). Length of first funiculus segment 0.14, of second 0.40. Maximum length of petiole 0.60, of postpetiole 1.10; maximum width of postpetiole 0.57. Dorsum of head transversely costulate behind the ocelli. Mesoscutum irregularly finely rugulose; sculpture similar but more longitudinal on mesoscutellum. Legs densely minutely punctulate on almost all surfaces, but the posterior face of the metafemur more shiny and notably less densely sculptured than the anterior face.
This rainforest species is closely related to monticellii but easily separated from it by the keyed characters. In addition, mocquerysi is larger than monticellii , has slightly longer scapes, different sculpture, distinctly larger eyes (compare measurements), and has the first gastral tergite with superficial reticular patterning everywhere on the dorsum. E. mocquerysi has queens that cannot be distinguished from workers without ovarian dissections (Heinze et al. 1999). Based on the number of ovarioles, however, two types of females can be distinguished: females (queen) with six ovarioles and a spermatheca which can mate and produce diploid offspring and females (workers) with only two ovarioles and no spermatheca but can lay unfertilized eggs.
Material examined. Madagascar: Prov. Antsiranana, SSW Befingotra, Res. Anjanaharibe-Sud (B.L. Fisher); S Andrakata (B.L. Fisher); Prov. Antsiranana, Parc National de Marojejy , Manantenina River, NE Andapa (B.L. Fisher et al.); Prov. Antsiranana, MarojejyR.N. I. #12 (GD. Alpert et al.); Prov. Antsiranana, NNW Manantenina (B.L. Fisher et al.); Prov. Antsiranana, Parc National de Marojejy , Antranohofa, NNE Andapa (B.L. Fisher et al.); Prov. Antsiranana, NW Manantenina (B.L. Fisher); Prov. Antsiranana, Foret de Binara, SW Daraina (B.L. Fisher); Betaolana forest, Ambodihazovolabe village along Ambolokopatrika river (B.L. Fisher et al.); Prov. Antsiranana, Makirovana forest (B.L. Fisher et al.); Galoko chain, Mont Galoko (B.L. Fisher et al.); Prov. Antsiranana, SAVA Region, distric of Sambava, Marojejy National Park, W of Manantenina village, 1st Camp site (Mantella) (Rin'Ha, Mike); Res. Spec. Marotandrano, Marotandrano, S Mandritsara (J.C. Rakotonirina); Reserve Speciale Ambatovaky, Sandrangato river, (B.L. Fisher et al.); Prov. Toamasina, Manakambahiny Atsinanana (A. Pauly); Prov. Toamasina, Manakambahiny, near Vavatenina Forest (A. Pauly); Prov. Toamasina, Montagne d'Anjanaharibe, NNE Ambinanitelo (Fisher, Griswold et al.); prov. Toamasina, Montagne d'Akirindro, NNW Ambinanitelo (Fisher, Griswold et al.); Prov. Toamasina, Ankerana (B.L. Fisher et al.).