Remarks: A single female specimen collected at the site Eiffel Tower on Lucky Strike differs from typical series of C. chacei in having an acuminate rostrum and acuminate antennal and pterygostomial spines on the carapace. We regard that the specimen is an abnormal individual of C. chacei, because it was collected along with individuals of typical C. chacei and we have not encountered such a form in other collections from the Lucky Strike.

Color: Cephalothorax red orange, abdomen paler.

This species is much less abundant (2-3 ind./dm2, by places) than Rimicaris exoculata. It is present close to chimneys and on sulfide blocks, mostly where fluid emissions are weak.

European waters (ERMS scope), Middle Atlantic

Mid-Atlantic Ridge: TAG, Snake Pit, Logatchev, Rainbow, and Lucky Strike.

Rostrum broadly rounded, flattened dorsoventrally, reaching or overreaching antennal spines; no dorsal or ventral teeth; ventral surface convex. Carapace somewhat compressed laterally, rounded dorsally; antennal spine blunt; pterygostomial angle strongly produced, terminating bluntly. Fourth abdominal pleuron blunt angular posteroventrally; fifth pleuron with subacutely pointed posterolateral angle. Telson narrowed posteriorly, bearing row of 6-8 dorsolateral spines arranged in sinuous row on either side; posterior margin broadly convex, with 1-3 spines at each lateral angle and with row of numerous plumose setae. Eye-stalks degenerated, broadly fused mesially without trace of median separation; no distinct spine or tubercle on anterior surface. Chela of first pereopod without fine row of long submarginal setae on outer surface along cutting edges of fingers. Third to fifth pereopods moderately slender to stout; dactyli armed with two or more rows of accessory spinules on ventral surface; meri and ischia unarmed. Third maxilliped and first to fourth pereopods without strap-like epipods. Appendices internae on second to fourth pereopods simple, slender, without cincinnuli. Protopod of endopod tapering distally, terminating subcautely or acutely.

Female, max. carapace length 17.4 mm; total length 55 mm.

Paratype for Rimicaris chacei Williams & Rona, 1986
Catalog Number: USNM 228454
Collection: Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology
Sex/Stage: female; juvenile
Preparation: Alcohol (Ethanol)
Year Collected: 1985
Locality: Mid-Atlantic Ridge, Tag Hydrothermal Field, North Atlantic Ocean
Depth (m): 3620 to 3650
Vessel: Researcher R/V

Paratype for Rimicaris chacei Williams & Rona, 1986
Catalog Number: USNM 228453
Collection: Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology
Sex/Stage: female;
Preparation: Alcohol (Ethanol)
Year Collected: 1985
Locality: Mid-Atlantic Ridge, Tag Hydrothermal Field, North Atlantic Ocean
Depth (m): 3620 to 3650
Vessel: Researcher R/V

Holotype for Rimicaris chacei Williams & Rona, 1986
Catalog Number: USNM 228452
Collection: Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology
Sex/Stage: female;
Preparation: Alcohol (Ethanol)
Year Collected: 1985
Locality: Mid-Atlantic Ridge, Tag Hydrothermal Field, North Atlantic Ocean
Depth (m): 3620 to 3650
Vessel: Researcher R/V

Depth range based on 42 specimens in 1 taxon.
Water temperature and chemistry ranges based on 42 samples.

Environmental ranges
  Depth range (m): 1626 - 3650
  Temperature range (°C): 2.523 - 4.255
  Nitrate (umol/L): 17.840 - 22.153
  Salinity (PPS): 34.913 - 35.039
  Oxygen (ml/l): 5.657 - 6.060
  Phosphate (umol/l): 1.148 - 1.496
  Silicate (umol/l): 13.580 - 42.727

Graphical representation

Depth range (m): 1626 - 3650

Temperature range (°C): 2.523 - 4.255

Nitrate (umol/L): 17.840 - 22.153

Salinity (PPS): 34.913 - 35.039

Oxygen (ml/l): 5.657 - 6.060

Phosphate (umol/l): 1.148 - 1.496

Silicate (umol/l): 13.580 - 42.727
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

Depth range based on 5 specimens in 1 taxon.
Water temperature and chemistry ranges based on 5 samples.

Environmental ranges
  Depth range (m): 3522 - 3635
  Temperature range (°C): 2.588 - 2.651
  Nitrate (umol/L): 21.196 - 21.953
  Salinity (PPS): 34.924 - 34.926
  Oxygen (ml/l): 5.734 - 5.734
  Phosphate (umol/l): 1.442 - 1.496
  Silicate (umol/l): 37.669 - 40.606

Graphical representation

Depth range (m): 3522 - 3635

Temperature range (°C): 2.588 - 2.651

Nitrate (umol/L): 21.196 - 21.953

Salinity (PPS): 34.924 - 34.926

Phosphate (umol/l): 1.442 - 1.496

Silicate (umol/l): 37.669 - 40.606
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1