Trichacis ariaspennae Buhl 2011

Trichacis ariaspennae Buhl 2011: 121, 122. Original description.

Diagnosis. Occiput medially smooth, laterally dull reticulate-coriaceous with vertical elements; hyperoccipital carina distinct and complete; OOL:LOL = 3:3.5; distance between posterior ocellus and hyperoccipital carina longer than diameter of posterior ocellus; notaulus strong, ending abruptly very shortly before reaching anterior margin; mesoscutum with very few setae, smooth except for reticulation in anterior 0.2; mid lobe posteriorly narrowly pointed, slightly prolonged to base of mesoscutellum; combined length of T3–T6> T2 (Buhl 2011 and pers. comm.).

The female holotype (the only specimen currently known) was collected in Brazil and was deposited at BMNH (Buhl 2011).

Trichacis ariaspennae has a complete hyperoccipital carina, but differs from other species with this character because: T kaulbarsi n sp. has the notaulus absent; T clypeata n. sp. has a projected clypeus fused with interantennal process; T. proximata n sp. has posterior ocellus very close to, almost touching hyperoccipital carina; T. triangulata n. sp. and T. costaricencis n. sp. have combined length of T3–T6 <T2.