Acanthoctenus lamarrei, Arizala & Labarque & Polotow, 2021

Arizala, Stephany, Labarque, Facundo Martín & Polotow, Daniele, 2021, Revision of the Neotropical spider genus Acanthoctenus (Araneae: Ctenidae Acanthocteninae), Zootaxa 4920 (1), pp. 1-55 : 44-46

Acanthoctenus lamarrei sp. nov.

Figs 10A , 42–43

Type material: male holotype from Playa Corona , near San Carlos [8°25’59.0”N, 80°00’21.7”W], Panama Province, Panama, 08.VIII.1983. H. & L. Levi coll., deposited in MCZ .

Etymology. The specific name is a patronym in honor of the entomologist Greg P. A. Lamarre, in recognition of many contributions to the knowledge on Panamanian spiders and friendship to the first author.

Diagnosis. Males of Acanthoctenus lamarrei sp. nov. ( Figs 42 D–E, 43) resemble those of A. spinipes ( Figs 15 D–E, 16A–B) by the median apophysis massive, the apex at least five times wider than the base, and RTA elongated, longer than wide. It can be distinguished by the embolus short, the apex ending at 12 o’clock and the base swollen at least four times the apex width, and RTA curved distally. A. spinipes presents an elongated embolus, the base slightly swollen starting at 9 o’clock and the apex ending at 2 o’clock, and RTA straight distally.

Description. Male (holotype MCZ). Total length 9.37. Carapace 4.93 long and 4.33 wide. Clypeus 0.26 high. Eye diameters: AME 0.26, ALE 0.19, PME 0.36, PLE 0.49. Leg measurements: I: femur 6.75/ patella 2.53/ tibia 8.55/ metatarsus 8.25/ tarsus 2.29/ total 28.37; II: 6.65/ 2.54/ 6.38/ 6.59/ 1.97/ 24.13; III: 5.18/ 1.91/ 4.50/ 5.33/ 1.63/ 18.55; IV: 6.70/ 1.96/ 6.10/ 8.46/ 2.71/ 25.93. Leg formula 1423. Leg spination: tibia I and II v-2-2-2-2-2-2-2-2-2, p-1-0-1-1, r-1-0-1-1-1, III v-2-2-2, p-1-1-1, r-0-0-1 and IV v-2-2-2, p-1-1-1, r-1-0-1-1; metatarsus I, II v2-2-2-2-2, p-1-0-1, r-1, III v-2-2-2, p-1-0-1, r-1-1, IV v2-0-1-1-1, p1-1-1, r-1-0-1-1. Palp ( Figs 42 D–E, 43): tibia shorter than cymbium, slightly curved; RTA elongated and sinuous; cymbium elongated and with retrobasal projection; embolus elongated but shorter than in most Acanthoctenus spp., cylindrical, and curved; conductor hyaline and following the tip of embolus; median apophysis laminar, elongated, narrow at the base and wider at the top, with a proapical hook.

Female. Unknown.

Distribution. Panama ( Fig. 10A ).

Figures

FIGURE 10. Distribution map of Acanthoctenus species. A, south of North America and Central America; B. north of South America.

FIGURE 15. Acanthoctenus spinipes Keyserling, 1877, male (ICN-Ar4667). A–C, habitus A, dorsal; B, ventral; C, frontal; D–E, male palp; D, ventral; E, retrolateral.

FIGURE 42. Acanthoctenus lamarrei sp. nov., male holotype (MCZ).A–C, habitus; A, dorsal; B, ventral; C, frontal. D–E, male palp; D, ventral; E, retrolateral.

FIGURE 43. Acanthoctenus lamarrei sp. nov., male holotype (MCZ). A–B, male palp; A, ventral; B, retrolateral.