Schismatothele wayana, Moeller & Weinmann & Guadanucci, 2023

Moeller, Wolf, Weinmann, Dirk & Guadanucci, José Paulo Leite, 2023, Genus Schismatothele Karsch, 1879 (Araneae, Theraphosidae): taxonomic notes and seven new species description, European Journal of Taxonomy 861, pp. 78-112 : 103-105

Schismatothele wayana sp. nov.

urn:lsid:zoobank.org:act:FE18E19C-E426-45E7-8A02-F05550D74544

Figs 21–22 , 75–82 , 87 ; Table 7

Diagnosis

Males differ from those of all other species by the presence of prolateral and retrolateral paraembolic keels ( Figs 75–79 ). Resemble those of S. benedettii , S. modesta and S. moonenorum sp. nov. by the embolus and paraembolic apophysis pointing forward ( Figs 51–52 ) and S. benedettii by the flat shape of paraembolic apophysis ( Figs 75–77 ). Females unknown.

Etymology

The name is in honor of the Wayana indigenous group, natives of the eastern region of the Pará State in Brazil.

Type material

Holotype BRAZIL • ♂; Pará, Jari-Almeirin ; 11 Feb. 2005; T. Gardner leg.; MPEG 7363 .

Paratypes BRAZIL • 2 ♂♂; same collection data as for holotype; MZSP 77130 • 2 ♂♂; same collection data as for holotype; IBSP 311777 .

Other material examined

BRAZIL • 11 ♂♂; same collection data as for holotype; MPEG 7351 , 7354 , 7355 , 7360 , 7362 (2 specs), 7364 (2 specs), 7367 to 7369 .

Description

Male (holotype MPEG 7363)

COLOR (in alcohol). Carapace, legs and chelicerae dark brown, sternum, labium reddish brown, abdomen light brown ( Figs 21–22 ).

MEASUREMENTS. Total length: 14.94. Chelicerae basal segment: length 2.46. Carapace elongated: length 7.27, width 6.02. Abdomen: length 6.45. Clypeus absent. Eye tubercle slightly elevated, subrectangular: length 0.58, width 1.34. Anterior eye row slightly procurved, posterior slightly recurved.

Eyes and interdistances:AME 0.37, ALE 0.32, PME 0.19, PLE 0.25, AME–AME 0.11,AME–ALE 0.03, ALE–ALE 0.79, PME–PME 0.65, PME–PLE 0.04, PLE–PLE 0.93, AME–PME 0.07 ALE–PLE 0.08. Thoracic fovea slightly procurved, deep with a longitudinal Y-shaped depression on carapace: width 0.76. Chelicerae basal segment with eight well-developed teeth on furrow promargin and a group of ca 20 small teeth on proximal area of furrow. Intercheliceral tumescence absent. Maxillae ca 100 cuspules,

located on anterior inner corner. Labium trapezoidal: length 0.76, width 1.09, with ca 180 cuspules. Sternum slightly oval: length 3.23, width 3.12; with three pairs of sigilla, posterior ones longer than the others with the same distance from the edge.

PALPAL BULB. Tegulum piriformis, with a long prolateral superior keel (PS) and a short inferior prolateral keel below (PI). Paraembolic apophysis flat, with rounded tip, below embolus, pointing forward. Presence of prolateral and retrolateral paraembolic keels ( Figs 75–79 ). Cymbium with two asymmetric lobes, retrolateral longer and wider; prolateral lobe elongated and laterally flattened; retrolateral lobe without a distal retrolateral protrusion. Palpal tibia swollen, without mid-length concavity, prolateral side with two parallel rows with 9–10 short spines disposed on apical third ( Figs 80–81 ).

LEGS AND PALPS. Tibial spur I: prolatero-ventral spur with two separate branches of different lenght; retrolateral branch larger, slightly procurved, with a small spine inserted subapically, prolateral branch shorter, slightly recurved, with contiguous spine with almost the same size ( Fig. 82 ). Metatarsus I bent retrolaterally to tibial spur. Superior tarsal claws without teeth. Tarsal scopulae: I and II entire with longitudinal band of conical setae, III and IV divided by longitudinal band of conical setae. Metatarsal scopulae not dense, extension: I on distal ¾, II on more than distal half, III on distal half, IV on less than half. Clavate tarsal trichobothria in two rows, each with ca 9 trichae, interspersed with filiform trichobothria of different lengths. Tarsus IV cracked. Leg formula 4123 ( Table 7 ).

SPINATION (proximal to distal). Cymbium and tarsi without spines. Palp: femur 0; patella 0; tibia (r) ca 10 megaspines. Leg I: femur (p) 1; patella (v) 1; tibia (r) 1-1-1; metatarsus (v) 1-1-1. Leg II: femur (p) 1; patella (v)1; tibia (v) 1-1-ap2, (p) 0-1-ap1; metatarsus (v) 0-2-ap2. Leg III: femur (p) 0-0-2, (r) 1; patela (r) 1; tibia (v)2-2-ap3, (p) 1, (r) 1; metatarsus (v)2-2-ap3, (p) 0-1-1, (r) 0-1-1. Leg IV: femur (p)1, (r) 1; patela (p) 1; tibia (v) 3-3-ap2, (p)1-0-2, (r) 1; metatarsus (v)2-3-ap3, (p) 1-1-1, (r) 1-1-1.

Figures

Figs 17–22. Schismatothele spp. 17–20. Schismatothele timotocuica sp. nov.17–18. Holotype, ♂ (MZSP 28420). 17. Dorsal view. 18. Prosoma, ventral view. 19–20. Paratype, ♀ (MZSP 26081). 19. Dorsal view. 20. Prosoma, ventral view. – 21–22. Schismatothele wayana sp. nov., holotype, ♂ (MPEG 7363). 21. Dorsal view. 22. Prosoma, ventral view. Scale bars = 10 mm.

Figs 75–82. Schismatothele wayana sp. nov., holotype, ♂ (MPEG 7363). 75–79. Palpal bulb, prolateral (75), retrolateral (76), ventral (77), dorsal (78), and frontal (79) views. 80–81. Palpal tibiae, right (80), and left (81). 82. Tibial spur, ventral view. Abbreviations: E = embolus; PA = paraembolic apophysis; PI = prolateral inferior keel; PPA = prolateral paraembolic keel; PS = prolateral superior keel; RPA = retrolateral paraembolic keel. Scale bars = 0.5 mm.

Fig. 87. Distribution map for species of Schismatothele Karsch, 1879.

Figs 51–58. Schismatothele moonenorum sp. nov., holotype, ♂ (IBSP 168510). 51–55. Palpal bulb, prolateral (51), retrolateral (52), ventral (53), dorsal (54), and frontal (55) views. 56–57. Palpal tibiae, right (56), and left (57). 58. Tibial spur, ventral view. Abbreviations: E = embolus; PA = paraembolic apophysis; PI = prolateral inferior keel; PS = prolateral superior keel; RSt = retrolateral striae; RT = retrolateral tegular apophysis; Vr = ventro-retrolateral keel. Scale bars = 0.5 mm.