Cyriocosmus williamlamari, Kaderka, 2015

Kaderka, Radan, 2015, The Neotropical genus Cyriocosmus Simon, 1903 and new species from Peru, Brazil and Venezuela (Araneae: Theraphosidae: Theraphosinae), Journal of Natural History 50, pp. 393-465 : 424-427

Cyriocosmus williamlamari sp. nov.

( Figures 15 , 16 , 29g , Table 10)

Types

Female holotype ( SMFD) from Venezuela, Apure, Rio Matiyure, Hato El Cedral , 7°28 ʹ 36.12 ʹʹ N, 69°20 ʹ 43.08 ʹʹ W, 4 September 1994, William Lamar col ., found in moist savannah adjacent to gallery forest fragment in the late afternoon, under piece of wood.

Etymology

The specific name is a patronym in honour of Dr William Lamar, who found this new species in Venezuela whilst filming with the BBC.

Diagnosis

Cyriocosmus williamlamari sp. nov. can be distinguished from all other congeners by the reddish-brown carapace with the black caput, the abdomen with four lateral stripes, apically not joined with urticating setae patch, three clear stripes are basally joined, the fourth stripe is located near spinnerets, and by the presence of the dark longitudinal ventral band. Spermathecae have very well-developed convex basal plates.

Distribution ( Figure 36 )

Known only from the type locality.

Description

Female (SMFD) ( Figures 15 – 16f , 29g ): Total length: 13.6, carapace length 5.9, width 4.7, chelicerae with 9 teeth on promargin. Cheliceral teeth pattern from basal end: right side: vVvvv-V-VVv, 5 small and 4 big teeth. Left side: vVvvv-V-VVV, 4 small and 5 big teeth. Anterior eye row procurved, posterior eye row recurved. Eye sizes and interdistances ( Figure 16f ): AME 0.25 (circular), ALE 0.33 (oval), PME 0.16 (U-shaped), PLE 0.29 (oval), AME – AME 0.12, AME – ALE 0.10, PME – PME 0.47, PME – PLE 0.03, ALE – PLE 0.05, AME – PME 0.05, OQ length 0.56, width 1.07. Ocular tubercle: length 0.83, width 1.07, clypeus absent. Fovea transverse, straight, width 0.75, 3.9 from anterior edge of carapace. Labium length 0.9, width 1.2, anterior third with 44 cuspules, maxillae with 124 – 137 cuspules. Sternum length 2.9, width 2.5, with three visible pairs of sternal sigilla located near coxae III (length 0.29, 0.18 from edge of sternum), coxae II and coxae I. Leg pattern: IV>I>II>III. All leg segments uniform, except slightly incrassate femora III.

Scopulae: All tarsi 100% densely scopulate, metatarsi I 60%, metatarsi II 50%, metatarsi III 30%, metatarsi IV 15% scopulate. Tarsal scopulae I, II integral, in tarsi III divided by narrow longitudinal band of setae, in tarsi IV divided by wide longitudinal band of setae.

Spination: femora I – IV and femora of palps 0; patellae I – IV and patellae of palps 0; tibiae I 0, II 0, III v 0-1-2 (apical), p 0-1-0, r 0-1-0, IV v 0-1-2 (apical), r 1-0-1 and tibiae of palps v 0-0-2 (apical); metatarsi I v 0-0-1 (apical), II v 1-0-1 (apical), III v 0-2-3 (apical), p 1-1-1, r 0-1-1, IV v 0-3-3 (apical), p 0-1-1, r 0-(0 – 1)-1, tarsi I – IV and tarsi of palps 0.

Spermathecae ( Figure 29g ): two separated spiral seminal receptacles, distally terminated with caliciform extension, basally with very well developed convex sclerotized plates.

Abdomen: urticating setae of type III are located in central glossy patch . PLS: length 2.8, basal segment 1.07, middle segment 0.66, apical segment 1.07, all digitiform. PMS: 0.60.

Coloration and covering setae: dorsal view ( Figures 15 , 16a ): carapace reddish-brown, and covered with golden pubescence, with black caput, coxae and trochantera reddishbrown, chelicerae dark, femora black, patellae, tibiae, metatarsi and tarsi dark, dorsally with whitish longitudinal stripes. Patellae I, II and palpal patella with two unequal parallel longitudinal stripes without covering setae, patellae III, IV with single diagonal stripe. Palpal femur and femur I prolaterally bare. Abdomen ( Figure 16d ) covered with short black setae, intermixed with long, pale setae in posterior part, except central reddish-brown glossy patch in shape of heart and four lateral stripes on each side, not reaching the patch, the first three lateral stripes basally joined, the fourth pair basally not joined. Length of central patch: 2.2, width 1.8. Ventral view ( Figure 16b ): labium, sternum, coxae and trochantera reddish-brown, femora, patellae, tibiae and metatarsi dark. Abdomen ventrally with dark longitudinal band ( Figure 16e ). Spinnerets light brown.

Figures

Figure 15. Cyriocosmus williamlamari sp. nov. from Venezuela, Apure, Rio Caicara, Hato El Cedral, female holotype (SMFD). Scale bar = 10 mm. Photo by William Lamar.

Figure 16. Cyriocosmus williamlamari sp. nov., female holotype (SMFD) from Venezuela, Apure, Rio Caicara, Hato El Cedral. (a) Carapace, coxae, trochantera and chelicerae, dorsal view. (b) Sternum, labium, coxae and trochantera, ventral view. (c–e) Abdomen with striped pattern, (c) lateral view, (d) dorsal view, (e) ventral view. (f) Ocular tubercle, dorsal view. Scale bar = 1 mm.

Figure 29. (a) Cyriocosmus peruvianus sp. nov., female paratype (NMPC P6A-5726, formerly RKCP 0363) from Peru, Iquitos, Rio Nanay, village of Cuyana. Spermathecae with two separated spiral seminal receptacles, terminated with a caliciform extension, ventral view. (b) Cyriocosmus itayensis sp. nov., female paratype (NMPC P6A-5728, formerly RKCP 0367) from Peru, Iquitos, Rio Itaya. Spermathecae with two separated spiral seminal receptacles, terminated with a globular extension, ventral view. (c) Cyriocosmus aueri sp. nov., female paratype (NMPC P6A-5730, formerly RKCP 0541) from Peru, Iquitos, the Amazon River, Nuevo Umaral. Spermathecae with two separated spiral seminal receptacles, terminated with a globular extension, ventral view. (d) Cyriocosmus hoeferi sp. nov., female (SMFD) from Brazil, Manaus, the Tarumã River, spermathecae with two spiral seminal receptacles, terminated with a shallow caliciform extension, ventral view. (e) Cyriocosmus pribiki Pérez-Miles and Weinmann, 2009, female paratype (SMFD 60238, fragmented female) from Peru, Amazonas, Tingo, Gualap. Spermathecae with two separated spiral seminal receptacles, terminated with a globular extension, including uterus externus, dorsal view. (f) Cyriocosmus ritae Pérez-Miles, 1998, female (NMPC P6A-5732, formerly RKCP 0348) from Peru, Iquitos, the Amazon River, Las Palmas, spermathecae with two spiral seminal receptacles, terminated with a caliciform extension, ventral view. (g) Cyriocosmus williamlamari sp. nov., female holotype (SMFD) from Venezuela, Apure, Rio Caicara, Hato El Cedral. Spermathecae with two separated spiral seminal receptacles, terminated with a caliciform extension, ventral view. (h) Cyriocosmus sp., female (MUSM-ENT 0506719) from Peru, Madre de Dios, Puerto Maldonado. Spermathecae with two separated spiral seminal receptacles, terminated with a globular extension, ventral view. Scale bar = 1 mm.

Figure 36. Distribution map of the Neotropic genus Cyriocosmus. Scale bar: 1000 km.