Adelomyrmex quetzal Longino, sp. nov.

(Figs 20, 21)

Type material. Holotype worker. Guatemala, Baja Verapaz: Biotopo Quetzal, 15.21224 −90.21421 ± 50 m, 1750 m, 7 May 2009 (LLAMA Wa-B- 02-1-39) [CAS, unique specimen identifier CASENT 0614520]. Paratypes (workers): Guatemala, Baja Verapaz: 4.5km S Purulha, 15.226 −90.2 ± 10 km, 1630 m, 21 May 1991 (R. S. Anderson 91-006) [ICN, CASENT 0604444], [INBIO, CASENT 0604450], [UCD, CASENT 0604453], [UNAM, CASENT 0604443]; same data but 24 May 1991 (R. S. Anderson 91-019) [LACM, CASENT 0603653], [UVGC, CASENT 0603652]; 7.5km S Purulha, 15.2 −90.2 ± 12 km, 1630 m, 26 May 1991 (R. S. Anderson 91-026) [BMNH, CASENT 0601496], [EAPZ, CASENT 0601501], [ECOSCE, CASENT 0601495], [MCZC, CASENT 0627819], [MZSP, CASENT 0627816], [USNM, CASENT 0627815].

Geographic range. Guatemala.

Diagnosis. Mandible lacking differentiated basal and masticatory margins; counting from apex, fifth tooth closer to sixth (basal) tooth than to fourth tooth; scape lacking long erect setae projecting above underlying pubescence; gaster dark red brown, concolorous with rest of body (gaster contrastingly yellow in the similar A. mackayi); metanotal groove not impressed (impressed in A. mackayi).

Description. Worker. HW 0.67–0.71 (n=6); mandible without differentiated masticatory and basal margins, with six distinct teeth distributed from apex to base, fifth tooth closer to sixth (basal) tooth than to fourth tooth, and with a deep notch between sixth tooth and basal condyle; dorsal surface of mandible with several coarse longitudinal striae and several large piligerous puncta; in full face view, lateral clypeal teeth project from beneath clypeal shelf; lateral clypeal teeth located on anterior (ventral) margin of clypeus and separate from transverse carina that forms clypeal shelf; hypostomal tooth absent; compound eye composed of 11–13 ommatidia; face fully sculptured with longitudinal rugae.

Short anterior face of pronotum well separated from dorsal face by an elevated transverse ruga; dorsal profile of promesonotum and propodeum forming a single arched convexity, metanotal groove not impressed; propodeal spines pronounced, acute; space between propodeal spines a broad concavity without distinct dorsal and posterior faces, smooth and shiny with a few transverse rugae; rest of mesosoma with strong, linear, longitudinal rugae; petiolar and postpetiolar nodes subquadrate with differentiated anterior, dorsal, and posterior faces; petiole and postpetiole coarsely irregularly rugose laterally, transversely rugose dorsally; postpetiole in dorsal view about as long as wide to slightly longer than wide, with straight anterior margin and evenly rounded posterior margin; gastral dorsum smooth and shining.

Scape with abundant long subdecumbent pubescence; clypeus and frontal carinae with long erect setae; posterior and posterolateral margins of head with long erect setae; mid and hind tibia with abundant long subdecumbent setae and 2–3 differentiated erect setae that are longer than width of tibia; in profile, dorsal surfaces of head, mesosoma, and gaster with relatively sparse, long, erect setae; FSH about 0.08, FSI 0.11.

Color dark red brown.

Biology. This species occurs in cloud forest, from 1550–1750 m elevation. It is known from ten different Winkler samples of sifted litter, from two regions of Guatemala.

Etymology. Referring to the type locality.