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Species: Dipturus olseni, Olsen’s wingedskate, Olsen’s spreadskate, Spreadfin skate

All Families:   All Genera:   All Species:

center disc no thorns
top + dark spots
distance between Ds ~ base D1
top brown + dark spots; bottom grey/black
pores under snout dark
tail: side thorns not hooked
tail thorns: 3 rows, center - 13-26 + 3-6 between Ds

Dipturus olseni (Bigelow & Schroeder, 1951)

Olsen’s wingedskate, Olsen’s spreadskate, Spreadfin skate

Rhomboidal disc with concave front margins; snout moderately elongate, its tip firm, with a stout cartilage; front edge of disc concave; front of pectoral distinctly separate from snout; eyes on top of head, with spiracles immediately behind; nostrils a little in front of mouth, with front lobes from nostrils forming a curtain between them and mouth; 2 small dorsal fins at rear of tail, distance between them about equal to base of  the 1st dorsal; pelvic fin with 2 distinct lobes connected by membrane, rear one larger; tail fin is a fold behind the second dorsal; top of disc largely free of denticles, present on rear borders of ventral side; no thorns on center of disc, 3 rows of thorns along tail, those thorns not with compressed, hooked tips, center row with 13-26 thorns, 3-6 thorns between dorsal fins.

Upper surface dark brown, with many small dark spots; lower surface grey to black, with mucous pores darkly pigmented.

Reaches 65 cm.

Depth range: 55-384 m.

The Gulf of Mexico.


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Salinity
  • Marine
  • Marine Only
Inshore/Offshore
  • Inshore Only
  • Inshore
Water Column Position
  • Bottom
  • Bottom only
Habitat
  • Sand & gravel
  • Mud
  • Soft bottom (mud/sand/gravel/beach/estuary/mangrove/seagrass)
  • Soft bottom only
FishBase Habitat
  • Demersal
Feeding Group
  • Carnivore
  • No Data
Diet
  • Mobile benthic crustacea (shrimps/crabs)
  • Bony fishes
  • Mobile benthic gastropods/bivalves
  • No Data
Egg Type
  • Benthic
  • No pelagic larva
  • No data
  • No pelagic phase
Global Endemism
  • West Atlantic Endemic
  • Greater Caribbean endemic
Regional Endemism
  • Gulf of Mexico endemic
  • Continent only
  • Continent
  • GC endemic
Residency
  • Resident
Climate Zone
  • Subtropical (23-35N, Florida / Carolinas / Bermuda)
IUCN Red List
  • Data deficient
  • Listed
CITES
  • Not listed
Length Max
  • 65
Depth Range Min
  • 55
Depth Range Max
  • 384