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Overview

Comprehensive Description

Description

Calliotropis (Otukaia) delli new species
Figures 13-15

 

 

DESCRIPTION. Shell large, thin, silky white, nonumbilicate, spire whorls convex. Protoconch of one and one-fourth whorls, teleoconch whorls seven, first teleoconch whorl with three spiral cords, noded to produce square cancellations: sculpture chang­ing by the second whorl to three prominently projecting spiral cords, the uppermost cord beaded, the other two smooth. Mature sculpture of three prominent cords, subsutural cord the least prominent, remaining close to the suture and losing its beading by about the third whorl; second cord sharply defined and sepa­rated from the subsutural cord by a broad, smooth area; third cord equally strong and projecting to form the peripheral extent of the whorl. Basal keep sharp; suture laid directly on its lower surface, not forming a channel. Basal cording of about three fine cords on the outer edge and two to three bordering the columellar wall; intermediate area of base smooth except for fine spiral striae. Columellar wall thickened, slanted, forming a spur at the base; outer lip thin. Operculum corneous, multispiral. Animal and radula as in C. chilena.

 

Dimensions: height 29.6 mm. diameter 30.9 min (holotype, Fig. 13): height 24.3 mm, diameter 23.2 mm (paratype, Fig. 14); height 29.0 mm, diameter 26.0 (paratype. Fig. 15).

 

MATERIAL. Chile: Los Vilos (LACM, type lot, Figs. 13-15), Papudo, Zapallar, Algarrobo, Punta Penablanca (LACM), Pichilemu, Constitución. Specimens examined: 114.

 

TYPE MATERIAL. Thirty-three specimens from the type lo­cality, collected 29 May 1977, by Andrade, shrimp trawler GODEN WIND, Holotype, LACM 1980; paratypes, LACM 1981; paratypes, MNHN 200489; paratypes, MZICB 15.528; paratypes, USNM 784738.

 

TYPE LOCALITY. 400 m off Los Vilos, Chile (31°56'S: 71°54'W).

 

DISTRIBUTION. Los Vilos (31°56'S) to Constitución, Chile (35°20'S). Depth range 200-450 m.

 

DIAGNOSIS. A species of the subgenus Otukaia characterized by having three spiral cords prominent at all growth stages. It differs from the similarly sculptured C. blacki (Dell, 1956) from New Zealand (see Dell, 1956: 46, pl. 7, fig. 6) in being lower spired, and in having a weaker subsutural (first) cord and a stronger second cord.

 

REMARKS. Calliostoma delli tends to be broader than high; one of the figured paratypes (Fig. 14) is unusually narrow, compared to most specimens on the type lot.

 

ETYMOLOGY. We are pleased to name this species in honor of Dr. Richard K. Dell of the National Museum of New Zealand, Wellington.”

 

 

 

(McLean & Andrade, 1982: 7-8)

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© National Museum of Natural History, Smithsonian Institution

Source: Antarctic Invertebrates Website (NMNH)

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Physical Description

Type Information

Holotype for Calliostoma atlantoides Quinn, 1992
Catalog Number: USNM 860261
Collection: Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology
Preparation: Dry
Locality: St. Lucia, Caribbean Sea, North Atlantic Ocean
Depth (m): 417 to 589
Vessel: Pillsbury R/V
  • Holotype: Quinn, J. F. 1992. The Nautilus. 106(3): 102.
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© Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology

Source: National Museum of Natural History Collections

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Unconfirmed type for Calliostoma (Otukaia) delli McLean & Andrade, 1982
Catalog Number: USNM 784738
Collection: Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology
Preparation: Dry
Year Collected: 1977
Locality: 400 M Off Los Vilos, Chile, South Pacific Ocean
Vessel: Golden Wind R/V
  • Unconfirmed type: Mclean, J. & Andrade, H. 1982. Contributions In Science (Natural History Museum Of Los Angeles County). 342: 1-20, figs.1-56.
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© Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology

Source: National Museum of Natural History Collections

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Ecology

Habitat

Known from seamounts and knolls
translation missing: en.license_cc_by_4_0

© WoRMS for SMEBD

Source: World Register of Marine Species

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

Environmental ranges
  Depth range (m): 274 - 274
  Temperature range (°C): 12.462 - 12.462
  Nitrate (umol/L): 16.704 - 16.704
  Salinity (PPS): 35.456 - 35.456
  Oxygen (ml/l): 3.043 - 3.043
  Phosphate (umol/l): 1.235 - 1.235
  Silicate (umol/l): 5.700 - 5.700
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
Specimen Records:160
Specimens with Sequences:109
Specimens with Barcodes:107
Species:22
Species With Barcodes:19
Public Records:82
Public Species:14
Public BINs:15
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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Barcode data

Creative Commons Attribution 3.0 (CC BY 3.0)

© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Wikipedia

Calliostoma

Calliostoma is a genus of small to medium-sized sea snails with gills and an operculum, marine gastropod molluscs within the family Calliostomatidae, the calliostoma top snails (according to the taxonomy of taxonomy of Gastropoda by Bouchet & Rocroi (2005)). Previously this genus was placed within the family Trochidae. Calliostoma is the type genus of the family Calliostomatidae.

The name of this genus is derived from the Greek words kallos (beautiful) and stoma (mouth), referring to the pearly aperture of the shell. The genus Calliostoma is known in fossil records from the Upper Cretaceous onwards.[2]

The distribution of this genus is worldwide, found mainly on hard substrata, although Japanese species have been found on sandy bottoms. These snails occur from shallow waters to bathyal depths.

The species in this genus are mainly herbivorous or feed on detritus,[3] although a few have been observed to be omnivorous (Keen, 1975) or even carnivorous, feeding on a wide range of algae and on animals belonging to various other invertebrate phyla.[4] The North Atlantic topshell Calliostoma occidentale has been reported to feed on coelenterates.[5]

Contrary to what is the case in most other top shells, Calliostoma deposits its eggs in gelatinous ribbons that are only fertilized after being deposited. The young emerge as small snails (Lebour, 1936) without passing through a free-living planktonic stage as a veliger larva.

Drawing of a dorsal view of a living animal of Calliostoma bairdii dredged in the Atlantic Ocean at a depth of from 100 m to 1170 m.
Rare purple beaded specimen of Calliostoma supragranosum found subtidally in Southern California.

Description[edit]

The rather thin, acute, coeloconoid (= approaching conical shape but with concave sides) shell is imperforate or rarely umbilicate. The whorls are smooth, often polished and spirally ridged or granular. The body whorl is angulated at the periphery. The aperture is quadrangular, sinuated at the base and slightly oblique. The columella is simple, usually ending anteriorly in a slight tooth.[6] The nucleus appears to be either dextral or sinistral indifferently.[7][8]

Species[edit]

Currently, Calliostoma is being treated in WoRMS as a broad genus. It is expected to be broken up and (some) subgenera will be elevated to the status of genus. At this moment (2013), information is too fragmentary to assign all species in a revised genus.

Species within the genus Calliostoma include:[9]

Species brought into synonymy
[9]

References[edit]

  • Vilvens C. (2012) New species and new records of Seguenzioidea and Trochoidea (Gastropoda) from French Polynesia. Novapex 13(1): 1-23. [10 March 2012] page(s): 18

Further reading[edit]

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Source: Wikipedia

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