Neocteniza myriamae, Bertani, Rogério, Fukushima, Caroline Sayuri & Nagahama, Roberto Hiroaki, 2006

Bertani, Rogério, Fukushima, Caroline Sayuri & Nagahama, Roberto Hiroaki, 2006, A new species of Neocteniza Pocock 1895 (Araneae, Idiopidae) from Brazil, Zootaxa 1202, pp. 33-37 : 34-36

Neocteniza myriamae new species

( Figs 1–4 )

Diagnosis

The new species can be distinguished from all other species, except N. australis , N. toba and N. chancani by the thicker embolus, the absence of an apophysis on the apical sclerite and the small apical hematodocha (i.e., it belongs to the australis group, Goloboff 1987). The species can be distinguished from N. australis and N. toba by the male embolus which is thicker in its middle portion ( Figs 1–3 ). From N. chancani , it can be distinguished by the larger size and elongated femur I ( Fig. 4 ), and especially by the presence of one conical keel and two parallel, well­developed keels on the apical half of the embolus.

Description

Male (holotype): Total length including chelicera 16.60. Carapace 6.00 long, 5.44 wide; pars cephalica convex, fovea deep, sinuous, recurved, tripartite. Anterior ocular row slightly procurved, posterior ocular row recurved. Eye sizes: AME 0.33, ALE 0.35, PME 0.18, PLE 0.20. Eye interdistances: AME­ALE 0.10, PME­PLE 0.08, AME­AME 0.15, ALE­PLE 0.18, PME­PME 0.73. OQ: length 1.11, width 1.44. Chelicerae with rastellum formed by 7 thick, blunt cusps on edge of cheliceral prolongation. Intercheliceral tumescence absent. Inner cheliceral margin with 10 teeth, 6 teeth between margins, 11 larger teeth on outer margin. Labium: length 1.20, width 1.33, without cuspules. Palpal coxae without cuspules. Sternum: length 3.17, width 3.06. Sigilla barely discernible. Legs: all articles unmodified; femur I elongated ( Fig. 4 ). Trichobothria: all femora and patellae 0; palpal tibia 7 ant. and 5 post., I 8 ant. and 9 post.; II 8 ant. and 7 post., III 5 ant. and 7 post., IV 10 ant. and 9 post.; metatarsus I 12, II 13, III 11, IV 14; tarsus I 11, II 14, III 11 and IV 9. Legs length: I trochanter 1.00 / femur 5.56 / patella 2.34 / tibia 4.06 / metatarsus 4.00 / tarsus 1.73 / total 18.69; II 0.61 / 4.67 / 2.17 / 3.23 / 3.67 / 1.78 / 16.13; III 0.56 / 3.67 / 2.11 / 2.28 / 3.78 / 2.11 / 14.51; IV 0.40 / 5.92 / 2.44 / 4.67 / 6.00 / 1.61 / 21.04 and palpus 1.00 / 3.11 / 1.22 / 2.77 / 1.78 / 9.88. Spines: femora: palpus, I–III 0, IV 15 p d a; patellae: palpus, I, II, IV 0, III 6 (1­2­3) P plus comb of 8 P A; tibiae: palpus as in fig. 3, I 2 v a, II 1­1 ­ 2 V (2:3A), III 3 v a, 1­2­1 D ANT, 1­2­1­1 D POST, IV 1­1 ­1­ 3 v; metatarsi: I 2­1 ­1­1­2 P V, 1­1­1­2­1­2 R V, II 1­1 ­1­1­1­1 P V, 1­1­1­1­1­1 R V, 1­ 1 V (1:3A), III 1­ 1 ­1­0­2­1 P D, 1­1­1­1­0­1­2 R D, 1­1­ 2 V, IV 1­1 D ANT (1:2), 1 D­A, 1­1­1­1­2 P, 0­1­ 1­0 R; tarsi: palpus 0, I 4, II 1, III 0, IV 1. Paired tarsal claws: Leg I 9 ant., 10 post.; Leg II 9 ant., 9 post.; Leg III 6 ant., 6 post. and Leg IV 9 ant., 9 post.. Inferior claw present on all legs, bare, well developed on tarsi III, IV. Preening combs present on metatarsi III, IV. All tarsi without scopula. Spinnerets short; ALS with ca. 25 spigots, basal article of PLS with ca. 38, medial article with ca. 29, apical article with 9 larger on apex. Palpal tibia incrassate. Male palpal bulb: flattened, thicker in middle, with small distal hematodocha. Apical portion of embolus with two parallel keels, extending ventrolaterally, retrolateral one longest, reaching from almost apex to roughly middle of embolus; third, conical keel apparent from retrolateral keel surface, extended over dorsal area ( Figs 1–3 ). Color: Carapace brown, abdomen dark. Tarsi to trochantera of legs and palpi olive, leg coxae reddish brown. Maxillae, sternum and labium dark reddish brown.

Female: Unknown.

Distribution

known only from type locality.

Figures

FIGURES 1 – 4. Neocteniza myriamae n. sp. holotype. (1 – 2) Right male palpal bulb. (1) Prolateral view. (2) Retrolateral view. (3) Right male palp, prolateral view. (4) Right leg I, prolateral view. Scale bar = 1 mm.