Adelomyrmex longinoi Fernandez, 2003

Fernández, F., 2003, Revision of the myrmicine ants of the Adelomyrmex genus-group (Hymenoptera: Formicidae)., Zootaxa 361, pp. 1-52 : 21-22

Adelomyrmex longinoi Fernandez NEW SPECIES

Worker measurements. Holotype (Paratype). HL 0.49 (0.50) HW 0.40 (0.41) SL 0.26 (0.28) EL 0.025 (0.030) WL 0.42 (0.44) GL 0.56 (0.56) TL 1.72 (1.76) CI 83 (83) SI 64 (69).

Worker diagnosis. Mandibles with 6 teeth, the three apical larger. Anterior margin of clypeal plate concave. Lateral clypeal teeth very reduced, smaller than median clypeal teeth. Eyes small, with 4 ommatidia. Hypostomal tooth small, inconspicuous. Promesonotum continuous, slightly convex and slightly higher than propodeum. Propodeal teeth triangular. Petiolar node narrow rounded above. Postpetiole with transverse carinae in their posterior face. Head rugoreticulated. Promesonotum irregularly rugose. Sides of pronotum, petiole and postpetiole rugoreticulated. Sides of mesosoma irregularly rugulose. Body red brown, appendages lighter.

Queen measurements. Paratype. HW 0.60 HL 0.71 SL 0.44 EL 0.13 WL 0.75 GL 0.84 TL 2.90 CI 84 SI 73.

As worker, with the typical queen myrmicine traits. Promesonotum smooth and shining to sculptured. Sides of pronotum with oblique rugulae. Pilosty short, erect, moderately abundant.

Holotype worker: COSTA RICA: Heredia, Est. Biol. La Selva , 10°26’N 84°01’W, 50-150m , 18.vi.1999, INBio-OET No. CRI002720661 (Deposited in INBio).

Paratypes: MÉXICO: 2 w, Chiapas, Ruinas de Palenque , 4.ix.1974, E.M. & J.L. Fisher ( LACM) ; COSTA RICA: 5 w, Heredia, Est. Biol. La Selva , 10°26’N 84°01’w, 50-150m , vi.1999, INBio-OET ; 1 w, Heredia, 13 km SSW Puerto Viejo , 10°21’N 84°03’w, 300m , 17.vii.1986, J. Longino No. 1390-S ; 1 w, Heredia, 5 km SW Puerto Viejo , 10°25’N 84°02’w, 100m , 15- 21.vii.1986, J. Longino No. 1392-S ; 1 w, Guanacaste, Cerro Cacao , 10°56’N 85°27’W, 1500m , 9- 11.ii.1989, J. Longino No. 2339-S ; 3 w, Puntarenas, 19 km S Ciudad Neily , 8°29’N 82°58’W, 20m , 25.iii.1990, J. Longino 2658- S ; 1 w, Puntarenas, Res. Biol. Carara , 9°47’N 84°36’W, 30 m , 25- 26.vii.1985, J. Longino No. 534-s . Five paratypes deposited in INBio and 9 paratypes deposited in LACM, ICN, MZSP, MIZA, BMNH .

Comments. The Mexican workers differ slightly from the Costa Rican ones. The head sculpturing is rugulate to rugo-reticulate posteriorly. The apical and subapical teeth on the masticatory margin are bigger than the basal and sub-basal teeth, and the promesonotum of the queen is smooth and shining (sculptured in Costa Rican queen). However, I consider these differences to be geographical variation, not worthy of species status. New collections in the areas between Mexico and Costa Rica (including queens and males) may clarify whether or not we are dealing with more than one species.