Cyriocosmus itayensis, 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 : 403-412

publication ID	https://doi.org/ 10.1080/00222933.2015.1076082
publication LSID	lsid:zoobank.org:pub:727D9326-42D3-45FF-A593-2EF6A9CE5745
DOI	https://doi.org/10.5281/zenodo.4331344
persistent identifier	https://treatment.plazi.org/id/03A9E109-FF9A-2F21-FE40-BFC6FC53FC71
treatment provided by	Carolina
scientific name	Cyriocosmus itayensis
status	sp. nov.

Treatment

Cyriocosmus itayensis View in CoL sp. nov.

( Figures 4 – 6 View Figure 4 View Figure 5 View Figure 6 , 25c, d View Figure 25 , 27b View Figure 27 , 29b View Figure 29 , 31e – h View Figure 31 , 33e, f View Figure 33 , Tables 4, 5)

Types

Male holotype ( NMPC P6 View Materials A-5727) from Peru, Iquitos , Nauta , Rio Itaya, village of Luz del Oriente, March 2007, Hans-Werner Auer col .; one female paratype ( NMPC P6 View Materials A-5728) ,

3. The variability in carapace length, number and arrangement of cheliceral teeth, number of labial and maxillary cuspules, leg pattern and spination of apophyses. (Continued)

3. (Continued).

(Continued)

3. (Continued).

found in a burrow about 30 – 40 cm long, and one male paratype ( SMFD), the same locality, date and collector as the holotype .

Etymology

The specific name is derived from the type locality near the Itaya River in the Peruvian Amazon .

Diagnosis

Cyriocosmus itayensis sp. nov. can be distinguished from all other congeners, except C. peruvianus sp. nov., C. aueri sp. nov., C. giganteus sp. nov., C. bertae and C. pribiki , by its uniformly coloured carapace and abdomen and by the short paraembolic apophysis in the male palpal bulb. Differs from C. peruvianus sp. nov. by having the globular extension in female seminal receptacles, from C. aueri sp. nov. by the different coloration and by having the flat basal plates in seminal receptacles, from C. giganteus sp. nov. by having the prolateral superior keel and approximately two times longer embolus in male palpal bulb, from C. bertae by having a smooth prolateral superior keel and by the presence of the retrolateral process on male palpal tibia, from C. pribiki by the different coloration, cymbium without spiniform setae and by the metatarsal flexion between the two tibial apophyses.

Distribution ( Figures 36 View Figure 36 , 37 View Figure 37 )

Known only from Peru, Maynas province in Loreto region, Rio Itaya near Iquitos. The region is originally covered with lowland rainforest.

Description

Male (NMPC P6A-5727) ( Figures 4a View Figure 4 , 5a – e View Figure 5 , 25c, d View Figure 25 , 27b View Figure 27 ): Total length: 21.7, carapace length 10.7, width 9.8, chelicerae with 9 teeth on promargin. Cheliceral teeth pattern from basal end: right side: vVVVV-V-VVV, 1 small and 8 big teeth. Left side: vVVVV-V- VVV, 1 small and 8 big teeth. Anterior eye row slightly procurved, posterior eye row slightly recurved. Eye sizes and interdistances ( Figure 5c View Figure 5 ): AME 0.41 (circular), ALE 0.48 (oval), PME 0.29 (oval), PLE 0.36 (oval), AME – AME 0.08, AME – ALE 0.12, PME – PME 0.78, PME – PLE 0.04, ALE – PLE 0.12, AME – PME 0.20, OQ length 0.81, width 1.74. Clypeus absent. Fovea transverse, straight, width 1.35, 6.9 from anterior edge of carapace. Labium length 1.68, width 1.68, anterior third with 96 cuspules, maxillae with 292 – 295 cuspules in anterior basal half, a few of them extending beyond the half. Sternum length 4.83, width 4.52, three pairs of sternal sigilla located near coxae III (length 0.49, 0.39 from edge of sternum), coxae II (length 0.23, 0.31 from edge of sternum) and coxae I (length 0.18, 0.26 from edge of sternum). Leg pattern: IV>I>II>III. Incrassate leg segments: femur III.

Scopulae: All tarsi 100% densely scopulate, metatarsi I – III 50%, metatarsi IV 25% scopulate. Tarsal scopulae I, II undivided, in tarsi III divided by longitudinal line of setae, in tarsi IV divided by narrow longitudinal band of setae.

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

Palpal organ as in Figures 25c, d View Figure 25 , embolus with short PA, smooth PS keel is fused with PA. Tegulum with distinct granulated TP, projecting prolaterally. Retrolateral face of cymbium without basal field of spiniform setae. Retrolateral face of palpal tibia with distinct subapical protuberance covered with cluster of numerous spiniform setae ( Figure 5e View Figure 5 ). Two unequal subapical apophyses are present on tibia I ( Figure 27b View Figure 27 ): a longer retrolateral tibial apophysis with very short, stout spine at apex, a shorter prolateral tibial apophysis with single, well-developed retrolateral spine at base, approximately of the same length as prolateral tibial apophysis. Metatarsus I not sigmoidly curved and without basal or median protuberance on retrolateral face. Metatarsus I flexion is between both tibial apophyses.

Abdomen: urticating setae of type III are located in central glossy patch. PLS: length 6.91, basal segment 2.39, middle segment 2.03, apical segment 2.49, all digitiform. PMS: 1.27.

Coloration and covering setae: dorsal view ( Figures 4a View Figure 4 , 5a View Figure 5 ): carapace uniformly reddish-brown, and covered with golden pubescence, without dark caput, coxae, trochantera and chelicerae reddish-brown, and covered with golden pubescence, femora, patellae, tibiae, metatarsi and tarsi black, intermixed with long, pale setae. Patellae I, II and palpal patella with two distinct longitudinal stripes without covering setae, patellae III, IV with single diagonal stripe. Abdomen covered with short black setae, intermixed with long, pale setae in posterior part, except central reddish-brown glossy patch in shape of a heart. Length of central patch: 3.68, width 4.34. Ventral view ( Figure 5b View Figure 5 ): labium, sternum, coxae and trochantera reddish-brown, femora, patellae, tibiae and metatarsi black. Abdomen ventrally without dark longitudinal band ( Figure 5d View Figure 5 ). Spinnerets dark brown.

Female (NMPC P6A-5728) ( Figures 4b View Figure 4 , 6a – e View Figure 6 , 29b View Figure 29 ): Total length: 26.2, carapace length 11.6, width 10.0, chelicerae with 9 – 10 teeth on promargin. Cheliceral teeth pattern from basal end: right side: vVVVVVV-VVV, 1 small and 9 big teeth. Left side: vVVVV-V-VVV, 1 small and 8 big teeth. Anterior eye row slightly procurved, posterior eye row slightly recurved. Eye sizes and interdistances ( Figure 6c View Figure 6 ): AME 0.59 (circular), ALE 0.46 (oval), PME 0.33, PLE 0.38 (oval), AME – AME 0.10, AME – ALE 0.10, PME – PME 0.95, PME – PLE 0.06, ALE – PLE 0.13, AME – PME 0.07, OQ length 0.88, width 1.98. Ocular tubercle: length 1.61, width 1.98, clypeus absent. Fovea transverse, procurved, width 2.2, 8.2 from anterior edge of carapace. Labium length 2.0, width 2.1, anterior half with 102 cuspules, maxillae with 359 – 361 cuspules. Almost rounded sternum, length 5.6, width 5.0, with three visible pairs of sternal sigilla located near coxae III (length 0.62, 0.73 from edge of sternum), coxae II (length 0.52, 0.49 from edge of sternum) and coxae I (length 0.29, 0.27 from edge of sternum). Leg pattern: IV>I>II>III. All leg segments uniform.

Scopulae: All tarsi 100% densely scopulate, metatarsi I, II 60%, metatarsi III 40%, metatarsi IV 25% scopulate. Tarsal scopulae I, II divided by longitudinal line of setae, in tarsi III divided by narrow longitudinal band of setae, in tarsi IV divided by wide longitudinal band of setae.

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

Spermathecae ( Figure 29b View Figure 29 ): two separated spiral seminal receptacles, distally terminated with globular extension, basally with slightly convex sclerotized plates.

Abdomen: urticating setae of type III are located in central glossy patch. PLS: length 8.65, basal segment 3.26, middle segment 2.44, apical segment 2.95, all digitiform. PMS: 1.59.

Coloration and covering setae: dorsal view ( Figure 4b View Figure 4 ): carapace uniformly reddishbrown, without dark caput, coxae and trochantera reddish-brown, chelicerae reddishbrown, and covered with golden pubescence, femora, patellae, tibiae, metatarsi and tarsi black, intermixed with long, pale setae. Patellae I, II and palpal patella with two indistinct parallel longitudinal stripes without covering setae, patellae III, IV with two unequal and indistinct diagonal stripes. Tibiae without such stripes. Femur I prolaterally almost bare. Retrolateral face of femur IV partly bare. Abdomen ( Figure 6d View Figure 6 ) covered with short black setae, intermixed with long, pale setae in posterior part, except central reddish-brown glossy patch in shape of heart. Length of central patch: 5.0, width 4.8. Ventral view ( Figure 6b View Figure 6 ): labium and maxillae reddish-brown, sternum, coxae and trochantera light brown, femora, patellae, tibiae and metatarsi black. Abdomen ventrally without dark longitudinal band ( Figure 6e View Figure 6 ). Spinnerets dark grey.

Variability

The variability in morphology of male palpal bulbs is shown on Figure 31e – h View Figure 31 , in the shape of spermathecae on Figure 33e, f View Figure 33 . In adult females the seminal receptacles have slightly convex basal sclerotized plates which are less extended and less sclerotized in juvenile specimens. The variability in the length of the carapace, the number and the arrangement of the cheliceral teeth, the number of labial and maxillary cuspules, the leg pattern and the spination of tibial apophyses is shown in Table 3.