Turbonilla nanseni Lygre & Kongsrud & Schander 2011, sp. n.
Description
Turbonilla nanseni sp. n.
Fig. 2
Etymology: This species is named in honour of the research vessel R/V Dr Fridtjof Nansen, used for the collection of all the material used in this study (http://www.imr. no/om_havforskningsinstituttet/fasiliteter/fartoy/dr._fridtjof_nansen/en).
Diagnosis: Tall, high spired with large protoconch, convex whorls, and strong axial ribs crossed by microstriae.
Description: Shell tall, slender, conical towards subcylindrical, milky white and shiny with rounded apex. Protoconch of type A-II, diameter 380 μm, protruding nucleus. Teleoconch whorls slightly convex. Suture incised, not deep, slightly undulating, noticeably oblique. Axial ribs not very elevated, thin, straight or slightly curved, opisthocline; closely set, broader than interspaces; disappearing at periphery of ultimate whorl. Base smooth. Microsculpture of undulating spiral striae in interspaces and on ribs. Aperture subrectangular. Inner lip slightly folded. Columellar tooth absent. No umbilicus.
Holotype: GABON:station G16, 03°49'S: 10°37'E,- 69m (ZMBN86948).Length 2.42mm,width0.6247 mm. Paratypes: Two from type locality in ZMBN (86949, 86950). One in NMSA (L8456 / T2747).
Distribution: Nigeria and Gabon, - 63– 69 m.
Comparison: Turbonilla fulgidula (Jeffreys, 1884) shows some resemblance to T. nanseni, but the whorls are slightly straighter in this species, and it has a subsutural shelf. The axial ribs have broader interspaces and are less opisthocline. T. pseudomarteli Peñas & Rolán, 1997 has a subsutural shelf and broader, more diffuse axial ribs. T. bengoensis Peñas & Rolán, 1997 has a smaller and more submerged protoconch, the whorls are slightly straighter and the axial ribs have broader interspaces.
Notes
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Linked records
Additional details
Identifiers
Related works
- Cites
- Figure: 10.5281/zenodo.7917242 (DOI)
- Is part of
- Journal article: 10.5733/afin.052.0202 (DOI)
- Journal article: http://zenodo.org/record/7917236 (URL)
- Journal article: http://publication.plazi.org/id/9C0CF669FFF1FFD8DC73FF92FFB5FFDF (URL)
- Is source of
- https://sibils.text-analytics.ch/search/collections/plazi/60358E11FFF4FFDDDDAEFD0AFC8AFA13 (URL)
Biodiversity
- Collection code
- NMSA , ZMBN
- Family
- Pyramidellidae
- Genus
- Turbonilla
- Kingdom
- Animalia
- Material sample ID
- L8456, T2747 , ZMBN86948
- Order
- Littorinimorpha
- Phylum
- Mollusca
- Scientific name authorship
- Lygre & Kongsrud & Schander
- Species
- nanseni
- Taxonomic status
- sp. nov.
- Taxon rank
- species
- Type status
- holotype , paratype
- Taxonomic concept label
- Turbonilla nanseni Lygre, Kongsrud & Schander, 2011
References
- JEFFREYS, J. G. 1884. On the Mollusca procured during the Lightning and Porcupine Expeditions, 1868 - 70. VIII. Proceedings of the Zoological Society of London 1884: 341 - 372.
- PENAS, A. & ROLAN, E. 1997. La familia Pyramidellidae Gray, 1840 (Mollusca, Gastropoda, Heterostropha) en Africa occidental. 2. Los generos Turbonilla y Eulimella. Iberus Supplement 3: lilƟ 5.