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  Original name  
  Check ECoF  
  Current accepted name  
Accepted name
  Status details  
senior synonym, original combination
  Status ref.  
In Smith. Status from Eschmeyer (CofF ver. Nov. 1999: Ref. 33021).
  Etymology of generic noun  
  from ETYFish
penta, from pente (Gr.), five; -anchus, perhaps an abridgement of branchos (Gr.), gill, referring to five pairs of branchial apertures (gill slits), unique among the group of sharks (hexanchoid) in which the authors erroneously believed this shark belonged. (See ETYFish)
  Etymology of specific epithet  
  from ETYFish
profundus (L.), deep; -colus (L.), dwelling in, referring to deepwater habitat (holotype taken at 1070 m). (See ETYFish)
  Link to references  
References using the name as accepted
  Link to other databases  

Note: ETYFish and FishBase started a collaboration to complete the etymology for all valid names of fishes. For the current update, the following groups were completed: hagfishes (Myxini), lampreys (Petromyzonti), chimaeras (Holocephali), and sharks (Squalomorphi). It is a work in progress, so the two websites may not be synchronized.

Scharpf, C. The ETYFish Project, Fish Name Etymology Database.
Please, report here on etymology issues.