''Cryptodaphne affinis'' 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 ...

Description

The length of the shell attains 9 mm, its diameter 3¾ mm. (Original description) The thin, white shell has a biconical shape. It contains about 10

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, of which about 4 form a red-brown

protoconch A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. In older texts it is also called ...

, with convex whorls, of which about 1½ upper whorls are smooth. The other ones show angular riblets, strongest near the upper suture, crossed in their lower part by fine, oblique striae. The subsequent whorls show a broad, concave upper part and a much narrower lower part. The sculpture consists of 2 conspicuous spirals, just below the suture, less distinctly developed 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 ...

, 5 much fainter ones in the excavation. This latter is bordered by a rather strong keel, which makes the whorls angular. Moreover there is a second keel at some distance, with 2 faint intermediate ones on the penultimate whorl. The part below the excavation on the body whorl is lirate over its whole surface. The upper, excavated part of whorls is crossed by rather distant curved riblets, which, in crossing the infrasutural lirae, produce small beads. At last the whole shell is covered with fine growth striae and excessively fine granules. The body whorl is convex, strongly attenuated towards its base. The aperture is obliquely oblong, sharply angular above, ending below in a short, compressed, gutter-like

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 ...

. The peristome is broken, probably with a wide, shallow sinus. The columellar margin is concave, with a thin layer of enamel. Schepman, 1913. The prosobranchia of the Siboga expedition. Part IV -V - VI: Toxoglossa

Distribution

This species was found in the Ceram Sea, Indoneasia.

References

External links

*
Gastropods.com: ''Cryptodaphne affinis''
{{Taxonbar, from=Q3722659

affinis ''Species affinis'' (commonly abbreviated to: ''sp.'', ''aff.'', or ''affin.'') is taxonomic terminology in zoology and botany. In open nomenclature it indicates that available material or evidence suggests that the proposed species is related t ...

Gastropods described in 1913