Cyriocosmus giganteus, 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 : 433-436

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.4331342
persistent identifier	https://treatment.plazi.org/id/03A9E109-FFB8-2F19-FE49-BE29FEAEFDB8
treatment provided by	Carolina
scientific name	Cyriocosmus giganteus
status	sp. nov.

Treatment

Cyriocosmus giganteus View in CoL sp. nov.

( Figures 20 View Figure 20 , 25g, h View Figure 25 , 28b View Figure 28 , Table 13)

Types

Male holotype ( MUSM-ENT 0505244 ) from Peru, Loreto, Estación Biológica Quebrada Blanco , 4°21 ʹ S, 73°09 ʹ W, 11 September 2007, Peter Gottleuber col GoogleMaps . GoogleMaps

Etymology

The specific name, giganteus (adjectivum, Latin) means giant, and refers to the size of this new species and to the fact that this male holotype is so far the largest known male in the genus.

Diagnosis

Cyriocosmus giganteus sp. nov. can be distinguished from all other congeners by the uniformly coloured carapace, abdomen without stripes and by the male palpal bulb without prolateral superior keel.

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

Known only from the type locality.

Description

Male (MUSM-ENT 0505244) ( Figures 20 View Figure 20 , 25g, h View Figure 25 , 28b View Figure 28 ): Total length: 26.7, carapace length 14.5, width 11.9, chelicerae with 10 teeth on promargin. Cheliceral teeth pattern from basal end: right side: vvvvvv-v-VVV, 7 small and 3 big teeth. Left side: vvvvvv-V-VVV, 6 small and 4 big teeth. Anterior eye row procurved, posterior eye row recurved. Eye sizes and interdistances ( Figure 20c View Figure 20 ): AME 0.53 (circular), ALE 0.49 (oval), PME 0.34 (oval), PLE 0.39 (oval), AME – AME 0.13, AME – ALE 0.17, PME – PME 1.01, PME – PLE 0.03, ALE – PLE 0.17, AME – PME 0.05, OQ length 0.92, width 1.95. Ocular tubercle: length 1.72, width 1.95, clypeus absent. Fovea transverse, straight, width 2.0, 9.0 from anterior edge of carapace. Labium length 1.69, width 2.14, anterior half with 101 cuspules, maxillae with 306 – 325 cuspules. Oval sternum, length 6.39, width 5.45, with three visible pairs of sternal sigilla located near coxae III (length 0.59, 0.88 from edge of sternum), coxae II (length 0.45, 0.70 from edge of sternum) and coxae I (length 0.29). Leg pattern: IV>I>II>III. Incrassate leg segments: femur III.

Scopulae: All tarsi 100% densely scopulate, metatarsi I, II 60%, metatarsi III 50%, metatarsi IV 25% scopulate. Tarsal scopulae I, II integral, in tarsi III divided by longitudinal line of setae, in tarsi IV divided by longitudinal band of setae.

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

Palpal organ as in Figure 25g, h View Figure 25 , embolus with short narrow PA reaching approximately one-third of embolus, PS keel is absent. Tegulum with distinct TP, projecting prolaterally. Retrolateral face of cymbium without basal field of spiniform setae, both cymbial lobes approximately of the same length. Retrolateral face of palpal tibia with indistinct subapical protuberance covered with cluster of numerous spiniform setae ( Figure 20f View Figure 20 ). Two unequal subapical apophyses are present on tibia I ( Figure 28b View Figure 28 ): a longer retrolateral tibial apophysis with short, stout subapical spine on dorsal face, a shorter prolateral tibial apophysis, apically flattened, with single, well-developed retrolateral spine at base and 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 patch . PLS: length 6.91, basal segment 2.03, middle segment 1.78, apical segment 3.10, all digitiform. PMS: 1.43.

Coloration and covering setae: dorsal view ( Figure 20a View Figure 20 ): carapace dark brown, and covered with golden pubescence, coxae and trochantera covered with golden pubescence, chelicerae black, dorsally covered with golden pubescence, femora black, patellae, tibiae, metatarsi and tarsi dark brown, without whitish longitudinal stripes. Patellae I, II and palpal patella with two longitudinal parallel stripes, patellae III, IV with single diagonal stripe. Abdomen ( Figure 20d View Figure 20 ) covered with short black setae, intermixed with long, pale setae in posterior part, except central yellowish brown patch. Length of central patch: 5.4, width 5.6. Ventral view ( Figure 20b View Figure 20 ): labium and maxillae reddishbrown, sternum, coxae and trochantera dark brown, femora black, patellae, tibiae and metatarsi dark brown. Abdomen ventrally without dark longitudinal band ( Figure 20e View Figure 20 ). Spinnerets brown.