Coccodentalium carduus Dall 1889
Main Authors: | Caetano, Carlos Henrique Soares, Scarabino, Victor, Absalão, Ricardo Silva |
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Format: | info publication-taxonomictreatment Journal |
Terbitan: |
, 2006
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Subjects: | |
Online Access: |
https://zenodo.org/record/6258408 |
Daftar Isi:
- Coccodentalium carduus (Dall, 1889) Figs. 33–38 + Dentalium carduus Dall 1889: 423, pl. 27, fig. 3. + Dentalium (Dentalium) carduus: Pilsbry and Sharp 1897: 30, pl. 7, fig. 6; Henderson 1920: 33, pl. 3, figs. 4,5, 7. + Dentalium (Fissidentalium) floridense Henderson 1920: 64, pl. 10, figs. 1,2,6,7; PennaNeme 1974: 113; Scarabino 1975: 184, pl. 59, fig. 902. + Dentalium (Coccodentalium) carduus: Emerson 1952: 2. + Dentalium (Coccodentalium) carduum: Abbott 1974: 384, fig. 4497. + Dentalium (Dentalium) carduum: Turner 1955: 311. Dentalium (Fissidentalium) amphialum (non Watson 1879): PennaNeme 1974: 113. + Fissidentalium floridense: Scarabino 1985: 199, pl. 72, fig. 1021; Sumida and PiresVanin 1997: 781. + Fissidentalium carduum: Scarabino 1994: 306, pl. 106, fig. 1509; Steiner and Kabat 2001: 444. + Fissidentalium carduus: Steiner and Kabat 2004: 574. + Coccodentalium carduum: Steiner 1998: 81. Type material Lectotype MCZ 7692 (designated by Henderson, 1920: 33); Paralectotypes USNM 95321, 1 dd, USNM 95322, 1 dd, MCZ 7691, 1 dd. Diagnosis Shell long (to 89 mm in length), slightly curved, regularly tapering, yellowish grey. Six primary ribs, secondary ribs present, attaining rapidily similar size of primary ones, transverse riblets present producing a rasplike surface. Apex with a deep, narrow slit at the convex side. Oral section polygonal, circular to slightly dorsoventrally compressed. Material examined Lectotype of Coccodentalium carduus; IBUFRJ 13786, sta 50, 19 dd; IBUFRJ 14245, sta C 13, 3 dd; IBUFRJ 14246, sta A 3, 1 lv, 14 dd; IBUFRJ 14306, sta 538, 2 dd; IBUFRJ 14307, sta 19 f, 1 dd; IBUFRJ 14308, sta 20, 1 dd. Distribution USA: North Carolina, Florida (Henderson 1920; Abbott 1974); Caribbean Sea: Barbados (Henderson 1920); Brazil: Maceió to Rio Grande do Sul (PennaNeme 1974; Scarabino 1975, 1985, 1994). Living 180 m (PennaNeme 1974) to 247 m (this study), shells 40 to 1980 m. Remarks This species is commonly included in Fissidentalium but the hexagonal apex (Fig. 34) and cancellated sculpture (Fig. 37) clearly place it in Coccodentalium. The six rib scheme is better observed in the apex of young specimens. It could be confused with Paradentalium gouldii or P. americanum that also have a hexagonal apical section, but C. carduus is more tapering and the pattern of the transverse sculpture as well as the apical slit are observed already in early stages of development.
- Published as part of Caetano, Carlos Henrique Soares, Scarabino, Victor & Absalão, Ricardo Silva, 2006, Scaphopoda (Mollusca) from the Brazilian continental shelf and upper slope (13 o to 21 oS) with descriptions of two new species of the genus Cadulus Philippi, 1844, pp. 1-47 in Zootaxa 1267 on pages 18-19, DOI: 10.5281/zenodo.173183