Phrixotrichus jara, Perafán & Pérez-Miles, 2014

Perafán, Carlos & Pérez-Miles, Fernando, 2014, The Andean tarantulas Euathlus Ausserer, 1875, Paraphysa Simon, 1892 and Phrixotrichus Simon, 1889 (Araneae: Theraphosidae): phylogenetic analysis, genera redefinition and new species descriptions, Journal of Natural History (J. Nat. Hist.) 48 (39 - 40), pp. 2389-2418 : 2410-2411

Phrixotrichus jara sp. nov.

( Figure 9 )

Types

Holotype ♂. Chile, VIII Región del Biobío, Concepción, Valle Nonguén, (37°00' S, 72°30' W), 150 m asl, 18 November 1995, C. Aracena leg., deposited in the arachnological collection of the Museo de Zoología , Universidad de Concepción , Chile ( MZUC-UCCC 174 ).

Etymology

The specific epithet is a noun in apposition as a recognition to Victor Jara, famous Chilean singer who was killed in 1973, during the government of the dictator Augusto Pinochet.

Diagnosis

Male differs from other Phrixotrichus species by the palpal organ morphology with serrated PI ( Figure 9A–C ).

Description

Male (holotype). Total length, not including chelicerae, nor spinnerets 34.1, carapace length 17.1, width 18.5. Anterior eye row procurved, posterior slightly recurved. Eyes sizes and interdistances: AME 0.28, ALE 0.46, PME 0.28, PLE 0.36, AME–AME 0.52, AME– ALE 0.40, PME–PME 1.14, PME–PLE 0.10, ALE–PLE 0.42, OQ length 2.10, width 2.60, clypeus 0.30. Fovea transverse, slightly recurved, width 4.00. Labium length 2.10, width 3.40 with 3 cuspules. Maxillae (right/left)with 131/160 cuspules. Sternum length 7.00, width 7.40. Chelicerae with 8 well-developed teeth on promargin of furrow and 21 small teeth on the proximal area of furrow. Tarsi I – IV densely scopulated, scopula I–IV entire. Metatarsi I and II scopulated more than a distal half, III on distal third, IV apically scopulated. Tibia I with prolateroventral distal double apophysis, RB has an apical spine and PB without spines ( Figure 9D ), branches are very different in size; prolateral very small. Flexion of metatarsus I on retrolateral side of the tibial apophysis. Palpal organ ( Figure 9A,B ) with two subequal prolateral keels ( PI and PS); PI has a serrated edge with 4 teeth ( Figure 9C ). Leg and palpal segments lengths in Table 7. Spination: Femora I – IV and palp 0 (curved). Patellae I– IV and palp 0. Tibiae I 0; II 2 V; III 1 V; IV 1 V ; palp 0. Metatarsi I 2 V; II 2 V; III 1 P, 1R, 5 V; IV 1 P, 11R, 4V; Tarsi I– IV and palp 0. Colour (in alcohol): Cephalothorax dark on the anterior region and dark-red backwards ( Figure 9E ), legs dark and abdomen dark brown with longer light brown setae (abdomen deteriorated). Type III, IV and intermediate III–IV urticating setae present; two lateral urticating setae patches. PMS well-developed, PLS normal, apical segment digitiform.

Female. Unknown.

Figures

Figure 9. Phrixotrichus jara sp. nov. (A) palpal organ, prolateral view; (B) palpal organ, retrolateral view; (C) palpal organ, detail of apex showing PI serrated; (D) tibial apophysis, prolateroventral view (apical spine on RB lost); (E) cephalotorax. PB: prolateral branch, PI: prolateral inferior keel, PS: prolateral superior keel, RB: retrolateral branch. The arrow shows the PI serrated. Scale bar = 1mm.