Tullbergia alcirae Palacios-Vargas, JG, Salazar-Martínez & AE 2014

Body length (n=12) 1.2 mm (range 0.83–1.4 mm), with moderately long macrosetae 61 µm (range 56–66), and short microsetae 18 µm (range 15–23), all of them smooth and thin. Relatively uniformly distributed fine intergumentary granules, interspersed with somewhat coarser granules on Abd. VI. Antennal bases well delimited. Ratio head: antenna = 1: 0.8. The relative lengths of Ant. I: II; III; IV are as 1: 1.6; 1.9; 1.8. Ant. III and IV fused dorsally (80 µm). Sense organ of Ant. III with two small sensory rods concealed behind one of the two integumentary folds; in addition there are three thick sensilla clubs, which are rounded at tip; two strongly bend towards each other and not concealed by cuticule. At bases of cuticle, the third sensillum concealed by one tegumentary fold. There is a ventral straight sensillum protected by three setae longer than other ventral setae. Ant. IV furnished with 6 sensilla, 3 of them very thin and long, three thick and short, one distinct subapical pit, one microsensillum and one slightly trilobed apical bulb (Fig. 1). Postantennal organ elliptical 35 µm (range 28–51), as long as width of the Ant. I, consisting of 72 (65–86) simple vesicles lying in two regular rows (Fig. 5). Legs chaetotaxy from I to III, coxae, 2,7,7; trochanters 5,5,5; femora, 9,9,9 (each with one ventral acuminate tenent hair); tibiotarsi (13,13,12), each with 2 ventral slightly clavate tenent hairs). Tibiotarsi short, 28 µm (range 22–31). Pretarsus with two setae each. Ungues untoothed. Empodial appendage rudimentary, in shape of a minute claw-like process (Fig. 4). Dorsal pseudocelli on the body arranged as follows: 11/122/22221. The pseudocelli are crescentic with 4–5 rows of granulations (type III of Weiner and Najt 1991). Dorsal chaetotaxy of thorax and abdomen in Figs 5 and 8 and Table 1. Th. II and III with one lateral microsensillum on each side. Dorsal chaetotaxy of abdomen on Fig. 8. Head ventrally mainly with microsetae, three pairs of postlabial setae, posterior one is macroseta (Fig. 7). Th. II and III ventrally with one pair of setae each and four setae of different sizes on each pleural side. Ventral tube with 6 + 6 setae (4 + 4 distal and 2 + 2 basal setae, Fig. 2). Pseudocelli of Abd. V are guarded by sensory setae similar to normal setae. Abd. IV tergite without a surrounding semicircular narrow ridge. Two anal spines relatively short, 37 µm (range 34–42) and weak, but usually slightly curved and placed on high papillae which touch at their bases (Fig. 8). Ratio anal spine: unguis III: 1: 1.5. Genital female plate with 3 pairs of pregenital setae, 2 pairs of circumgenital and one pair of eugenital setae. Males with 3 pairs of pregenital setae, 6 pairs circumgenital setae and 1 + 1 eugenital setae (Fig. 6). Dorsal chaetotaxy of Tullbergia alcirae sp. n. Thorax Abdomen row I II III I II III IV V a - 8 10 10 12 12 10 8 m - 8* 8* 2** 2** 2** 2*** 8 p 8 10 10 10 12 12 10 4 pl 2 3 3 2 3 3 4 2 * Missing m2, ** m4 present, *** one medial setae on row m.

Type locality: Argentina: Bs As: Punta Lara, 34°48'S; 58°00'0"W, ex soil, grassland dominated by grasses (Poaceae) and sedge (Cyperaceae), May 2010. The specimens were extracted from soil samples in Berlese’s funnels. A. Salazar Martínez collector. Holotype. Female mounted on slide. Original label: 5404/1 deposited at Colección División Entomología, Museo de la Plata. Paratypes: 2 females paratypes, 2 males paratypes, all of them mounted on slides. Original label: 5404/2-4 deposited at Colección División Entomología, Museo de la Plata. 6 females, 4 males and 11 juvenil paratypes with the same collecting data are kept at senior’s author institution with catalog number 2436.