''Pseudodaphnella martensi'' is a species of

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

, a marine

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusk in the family

Raphitomidae Raphitomidae is a family of small to medium-sized sea snails, marine gastropod mollusks in the superfamily Conoidea.Bouchet P. & Rocroi J.-P. (Ed.) (2005). "Classification and nomenclator of gastropod families". '' Malacologia'' 47(1-2). . 3 ...

.MolluscaBase (2019). MolluscaBase. Pseudodaphnella martensi (G. Nevill & H. Nevill, 1875). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=596297 on 2019-11-20

Description

The length of the shell varies between 4 mm and 5.5 mm. (Original description) The shell is regularly and conically fusiform, of rather dark brown colour with bright lilac granules. It contains seven rounded

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane floral ...

s, reticulated with very thick somewhat distant ridges, forming at the points of intersection, three rows of large, pearl-like, slightly oblong granules. On the

body whorl The body whorl is part of the morphology of the shell in those gastropod mollusks that possess a coiled shell. The term is also sometimes used in a similar way to describe the shell of a cephalopod mollusk. In gastropods In gastropods, the b ...

these three rows of granules are repeated. After the sixth row the shell abruptly becomes contracted, forming an excavated furrow. Near the base there are again six rows of granules, but much smaller and more rounded. These give a somewhat angular appearance to the body whorl. The columella is much contorted, or twisted in the middle. It has a lilac colour, with a few minute denticulations at its edge. The aperture and the four strong denticulations at its outer edge are also of a lilac colour. The sinus is deep and rounded. The outer lip is bright brown, abruptly contracted near its base, forming a strongly marked

siphonal canal The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda. Some sea marine gastropods have a soft tubular anterior extension of the mantle called a siphon through which water is ...

. Nevill G. & Nevill H. (1875) ''Descriptions of new marine Mollusca from the Indian Ocean.'' Journal of the Asiatic Society of Bengal, 44(2): 83–104, pls. 7–8

Distribution

This marine species occurs off

Sri Lanka Sri Lanka (, ; si, ශ්‍රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an ...

and

French Polynesia )Territorial motto: ( en, "Great Tahiti of the Golden Haze") , anthem = , song_type = Regional anthem , song = " Ia Ora 'O Tahiti Nui" , image_map = French Polynesia on the globe (French Polynesia centered).svg , map_alt = Location of Frenc ...

References

External links

*
Fedosov A. E. & Puillandre N. (2012) ''Phylogeny and taxonomy of the Kermia–Pseudodaphnella (Mollusca: Gastropoda: Raphitomidae) genus complex: a remarkable radiation via diversification of larval development''. Systematics and Biodiversity 10(4): 447-477

Kilburn, R. N. (2009). Genus Kermia (Mollusca: Gastropoda: Conoidea: Conidae: Raphitominae) in South African Waters, with Observations on the Identities of Related Extralimital Species. African Invertebrates. 50(2): 217-236

Gastropods.com: ''Pseudodaphnella martensi''

MNHN, Paris: specimen
{{DEFAULTSORT:Pseudodaphnella Martensi martensi Gastropods described in 1875