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Overview

Comprehensive Description

Description

Yoldia (Yoldiella) chilenica DALL, n. sp.

 

 

Shell small, tumid, white with a polished pale yellow periostracum, inequilateral, the anterior side shorter, rounded; posterior longer, rounded below, straight above, and almost pointed at the upper posterior angle; ligament obscure, amphi­detic; beaks low, adjacent, showing the protoconch; no lunule, a feebly impressed escutcheon with the valve margins medially prominent; surface of the disk feebly, irregularly, concentrically striated; valves not gaping; interior white, porcel­lanous, with a wide but short pallial sinus, rounded in front; seventeen posterior and nineteen anterior hinge teeth separated by a short gap with a small, deep, triangular pit for the resilium. Length of shell, 11.5 ; of posterior end, 6.0; alt. 6.5 ; max. diam. 5.2 mm.

 

U. S. S. "Albatross," station 2731, on the southern coast of Chile (Lat. 51°52' S.), in 348 fathoms, mud, bottom temperature 50° F. U. S. N. Mus. 96,923. Also at station 2782, in 258 fathoms, mud, temperature, 48° F.

 

This pretty little species looks something like the young of Y. thraciaeformis (cf. Hanley, Mon. Nuculacea, fig. 4), but is entirely unlike any species reported from the region mentioned.”

 

 

(Dall, 1908: 380-381)

Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© National Museum of Natural History, Smithsonian Institution

Source: Antarctic Invertebrates Website (NMNH)

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Physical Description

Type Information

Syntype for Yoldia (Yoldiella) chilenica Dall, 1908
Catalog Number: USNM 96923
Collection: Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology
Preparation: Dry
Collector(s): United States Fish Commission
Locality: W coast Patagonia (S coast of Chile)
Depth (m): 636 to 636
Vessel: Albatross R/V
  • Syntype: Bull. Mus. Comp. Zool. 43(6): 219,380.
Creative Commons Attribution 3.0 (CC BY 3.0)

© Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology

Source: National Museum of Natural History Collections

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Ecology

Habitat

Depth range based on 1 specimen in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 636 - 636
  Temperature range (°C): 4.143 - 4.143
  Nitrate (umol/L): 29.642 - 29.642
  Salinity (PPS): 34.196 - 34.196
  Oxygen (ml/l): 5.675 - 5.675
  Phosphate (umol/l): 1.978 - 1.978
  Silicate (umol/l): 26.497 - 26.497
 
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