Misionella aikewara, Brescovit, Antonio D., Magalhaes, Ivan L. F. & Cizauskas, Igor, 2016

Brescovit, Antonio D., Magalhaes, Ivan L. F. & Cizauskas, Igor, 2016, Three new species of Misionella from northern Brazil (Araneae, Haplogynae, Filistatidae), ZooKeys 589, pp. 71-96 : 80-83

Taxon classification Animalia Araneae Filistatidae

Misionella aikewara sp. n. Figs 4 A–G, 11 D–F, 13E, 14

Type material.

Male holotype from Cave SI-07 (788310 9295476), São Geraldo do Araguaia, Pará, Brazil, 31. VIII– 09.IX.2009, F. P. Franco et al., deposited in IBSP 191196; female paratype from Cave SI-04 (786471 9290451), Xambioá, Tocantins, 31. VIII– -09.IX.2010, F. P. Franco et al., deposited in IBSP 191194.

Additional material examined.

BRAZIL. Pará: São Geraldo do Araguaia, Cave SI-30 (783442 9304748), 1♀, 31.VIII‒09.IX.2010, F. P. Franco et al. (IBSP 191197); 2 imm., 22.II‒02.III.2011, F. P. Franco et al. (IBSP 191199); Tocantins: Ananás, Cave SI-13 (785816 9310724), 1♀, 31.VIII‒09.IX.2010, F. P. Franco et al. (IBSP 191195); Cave SI-13, 2♀, 27‒31.I.2011 (IBSP 191198); Tocantins: Miracema do Tocantins (09°34'02"S, 48°23'30"W), 3♀ 1 imm., 17‒25.IV.2005, I. Knysak & R. Martins, in a cave at night (IBSP 124517).

Etymology.

The specific name is a noun in apposition and refers to the ethnic group of the region of São Geraldo do Araguaia, where the type locality is located: the Tupi indigenous group Aikewará.

Diagnosis.

Males of Misionella aikewara can be distinguished from Misionella carajas and Misionella pallida by the shorter palpal tibia and elongated paraembolic lamina (Figs 4 E–G, 11D‒E). Females can be recognized by the elongated receptacles curved distally and separated at the base (Fig. 11F).

Description.

Male (holotype). Carapace orange with brown submarginal bands. Thoracic groove and ocular area black. Chelicerae orange. Labium and endites yellowish. Sternum yellowish with brown borders. Legs and palps orange. Abdomen dark brown (Fig. 4A). Total length 2.7. Carapace 1.2, long, 1.0 wide. Sternum with small and shallow sulcus, without sigillae. Eye diameters: PME 0.4, separated by your diameters. Palp: femur length 2.0, patella 1.0, tibia 1.2 long, 0.8 wide. Leg measurements: I: femur 2.8, patella 0.5, tibia 1.9, metatarsus 1.8, tarsus 0.9, total 7.9; II: 2.0, 0.4, 2.1, 1.3, 0.6, 6.4; III: 1.3, 0.5, 1.3, 1.3, 0.7, 5.1; IV: 2.0, 0.5, 1.9, 1.8, 0.9, 7.0. Metatarsus II with a pair of hirsute macrosetae (Fig. 4 C–D). Abdomen 1.5 long. Palp: tibia shorter, two times the length of cymbium, bulb globose (Fig. 4 E–G).

Female (IBSP 191194, cave SI-04). Coloration pattern as in male (Fig. 4B), except endites orange and legs darker. Total length 5.6. Carapace 2.1 long, 1.6 wide. Sternum as in male. Eye diameters: PME 0.4, separated by 2 diameters. Palp: femur length 1.5, patella 0.7, tibia 0.8, tarsus 0.9. Leg measurements: I: femur 2.9, patella 0.9, tibia 3.0, metatarsus 2.8, tarsus 1.2, total 10.8; II: 2.1, 0.7, 2.0, 1.8, 0.9, 7.5; III: 1.8, 0.7, 1.4, 1.5, 0.8, 6.2; IV: 2.0, 0.8, 2.1, 2.0, 0.9, 7.8. Abdomen 3.2 long. Spermathecae with elongated ducts and curved apex (Fig. 11F).

Variation.

5 females: total length 3‒4.5; carapace 1.4‒2; femur I 1.7‒2.2.

Natural history.

Eleven specimens were collected, only one male, eight females and two immature, in four limestone caves located in municipalities very close to the border of the states of Pará and Tocantins (Fig. 14). In general, the walls of the caves had high humidity with pools and/or running water therein. These caves have high number of micro-habitats such as roots, guano and crevices. The specimens of Misionella aikewara sp. n. were located in lighter areas as well as in the darker areas of the interior of caves. The webs are irregular, as in Misionella carajas sp. n., and the capture was always performed in the refuge of their webs located on the walls and cracks in the cavity (Fig. 13E). All specimens were found inside caves and do not show any kind of troglomorphism.

Distribution.

This species occurs only in the region of the State Park of Serra das Andorinhas, in states of Pará and Tocantins (Fig. 14).