Chisosa Huber, 2000

Huber, Bernhard A. & Carvalho, Leonardo S., 2019, Filling the gaps: descriptions of unnamed species included in the latest molecular phylogeny of Pholcidae (Araneae), Zootaxa 4546 (1), pp. 1-96: 31

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Chisosa Huber, 2000


Chisosa Huber, 2000 

Chisosa Huber, 2000: 124  ; type species by original designation: Pholcophora diluta Gertsch & Mulaik, 1941  .

Diagnosis/Description. See Huber (2000). The new species below fits the original diagnosis. No other New World genus combines small body size (0.8–1.4) with strongly enlarged male palpal femora (figs 483 and 490 in Huber 2000; Figs 105–106View FIGURES 105–109, 110–111View FIGURES 110–116 herein). The male cheliceral armature is more variable among species than originally thought, but such variation in common among close relatives in Pholcidae  and thus not unexpected.

Monophyly. The recent molecular phylogeny of Pholcidae ( Eberle et al. 2018)  supports a sister group relationship between the type species Chisosa diluta (Gertsch & Mulaik, 1941)  and the new species C. caquetio  . However, no clear morphological synapomorphy is known to support the genus in its present composition. The widened male palpal femur was originally considered a potential synapomorphy ( Huber 2000), but at that time Chisosa  was thought to belong to Ninetinae  ; however, a widened male palpal femur is plesiomorphic for Arteminae  . Similarly, the procursus is relatively complex when compared to other Ninetinae  but not when compared to other Arteminae  . It is unclear whether the small body size of Chisosa  is a plesiomorphic or derived character.

Generic Relationships. The recent molecular phylogeny of Pholcidae ( Eberle et al. 2018)  places the genus in “other Arteminae  ” (i.e. Arteminae  without Artema  ) as sister to all other genera in this group; however, this sister group relationship receives low support.

Composition. The genus now includes three species: C. diluta (Gertsch & Mulaik, 1941)  ; C. baja (Gertsch, 1982)  , and C. caquetio  sp.n..

Distribution. Known from Texas ( USA), Baja California Norte ( Mexico), and Curaçao and Aruba ( Netherlands Antilles).












Chisosa Huber, 2000

Huber, Bernhard A. & Carvalho, Leonardo S. 2019


Huber, B. A. 2000: 124