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Pyramidella
''Pyramidella'' is a genus of minute to medium-sized sea snails, marine gastropod mollusk in the subfamily Pyramidellinae of the family Pyramidellidae, the pyrams and their allies. ''Pyramidella'' is the type genus of the family Pyramidellidae. Nomenclature The generic name ''Pyramidella'' Lamarck, 1799, has been validated under the Plenary Powers of the ICZN , Opinion 386 (1955). The name ''Obeliscus'' Anonymus, 1797 ''Obeliscus'' Gray, 1847">Obeliscus.html" ;"title=" ''Obeliscus"> ''Obeliscus'' Gray, 1847has also been used for this genus, whereas the name ''Pyramidella'' was used for the genus now known as ''Otopleura'' Fischer, 1885. General description The shell has an elongate-conic shape, slightly striated. The many Whorl (mollusc), whorls of the teleoconch are usually inflated and regularly increasing. They are longitudinally ribbed or smooth. The semioval Aperture (mollusc), aperture is entire, widened at its base and rounded in front. .The columella has one to three ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramidella Africana
''Pyramidella'' is a genus of minute to medium-sized sea snails, marine gastropod mollusk in the subfamily Pyramidellinae of the family Pyramidellidae, the pyrams and their allies. ''Pyramidella'' is the type genus of the family Pyramidellidae. Nomenclature The generic name ''Pyramidella'' Lamarck, 1799, has been validated under the Plenary Powers of the ICZN , Opinion 386 (1955). The name ''Obeliscus'' Anonymus, 1797 ''Obeliscus'' Gray, 1847">Obeliscus.html" ;"title=" ''Obeliscus"> ''Obeliscus'' Gray, 1847has also been used for this genus, whereas the name ''Pyramidella'' was used for the genus now known as ''Otopleura'' Fischer, 1885. General description The shell has an elongate-conic shape, slightly striated. The many Whorl (mollusc), whorls of the teleoconch are usually inflated and regularly increasing. They are longitudinally ribbed or smooth. The semioval Aperture (mollusc), aperture is entire, widened at its base and rounded in front. .The columella has one to three ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramidella Canaliculata
''Pyramidella'' is a genus of minute to medium-sized sea snails, marine gastropod mollusk in the subfamily Pyramidellinae of the family Pyramidellidae, the pyrams and their allies. ''Pyramidella'' is the type genus of the family Pyramidellidae. Nomenclature The generic name ''Pyramidella'' Lamarck, 1799, has been validated under the Plenary Powers of the ICZN , Opinion 386 (1955). The name ''Obeliscus'' Anonymus, 1797 ''Obeliscus'' Gray, 1847">Obeliscus.html" ;"title=" ''Obeliscus"> ''Obeliscus'' Gray, 1847has also been used for this genus, whereas the name ''Pyramidella'' was used for the genus now known as ''Otopleura'' Fischer, 1885. General description The shell has an elongate-conic shape, slightly striated. The many Whorl (mollusc), whorls of the teleoconch are usually inflated and regularly increasing. They are longitudinally ribbed or smooth. The semioval Aperture (mollusc), aperture is entire, widened at its base and rounded in front. .The columella has one to three ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramidella Acus
''Longchaeus acus'', common name the needle pyram, is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.Rosenberg, G. (2010). ''Pyramidella acus'' (Gmelin, 1791). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=208425 on 2012-01-12 Description The shell is polished. Its color is white, with dark chestnut or chocolate spots, usually arranged in three revolving series on the whorls of the teleoconch and five series on the body whorl. The columella is three-plaited with the upper plait largest. The lip is sometimes lirate within. The peripheral groove becomes in this species either obsolete or indicated by a slight angle. The length of the shell varies between 19 mm and 67 mm. Distribution This marine species occurs in the Indo-W Pacific (Red Sea, Tanzania, Madagascar, Mauritius, Mascarene Basin and in South East Asia, in Vietnam and Philippines ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramidella Dolabrata
''Pyramidella dolabrata'', common name the "giant Atlantic pyram", is a somewhat variable species of small to medium-sized (max size 36 mm) sea snail, a marine gastropod mollusk in the (mostly minute) family Pyramidellidae, the pyram snails. Description The length of the shell varies between 14 mm and 36 mm. The white shell is conical, turreted, polished, elongated, slightly transparent. It has three or four transverse, narrow reddish or chestnut spiral lines on the body whorl, and two on the whorls of the teleoconch. The middle band s always narrowest ; the others are wider and deeper colored. The pointed spire is composed of from ten to twelve distinct, smooth, slightly convex whorls. The body whorl is more inflated than the other whorls. The shell is smooth and umbilicated. The ovate aperture is subrotund at its base, and generally marked within, with very prominent ridges continued upon some specimens even to the edge of the sharp outer lip. The outer lip i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramidella Bairdi
''Pyramidella bairdi'' is a species of very small sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.Bouchet, P. (2012). Pyramidella bairdi Dall & Bartsch, 1909. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575940 on 2012-02-09 This species was named for William Baird (1803-1872), a British zoologist. Description The broadly conic shell has a milk-white color, with a narrow pale yellow band at the periphery. The shell grows to a length of 5.1 mm. It is deeply, broadly umbilicated. There are least 2½ whorls in the protoconch. They form a depressed helicoid spire, whose axis is at right angles to that of the succeeding turns, in the first of which it is about one-half immersed. The six whorls of the teleoconch are well rounded, faintly roundly shouldered at the summit. The sutures are well impressed. The periphery and the base of the body whorl are somewhat inflate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramidella Bicolor
''Pyramidella bicolor'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.WoRMS (2011). ''Pyramidella bicolor'' Menke, 1854. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575937 on 2012-01-12Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064 Description The shining shell has an elongate-conic shape. The early whorls are white, the succeeding ones gradually acquiring a pinkish tinge, which deepens and finally tints the last whorl rose-purple. The length of the shell varies between 8 mm and 10 mm. (The whorls of the protoconch are decollated). The eight whorls of the teleoconch are overhanging, flattened, slightly shouldered and minutely crenulated, and deeply sulcate at the periphery. The sutures are strongly impressed. The base of the shell is short, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramidella Ava
''Pyramidella ava'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.WoRMS (2011). ''Pyramidella ava'' Bartsch, 1926. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575936 on 2012-01-12Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064 Distribution This species occurs in the Pacific Ocean off Ecuador Ecuador ( ; ; Quechua: ''Ikwayur''; Shuar: ''Ecuador'' or ''Ekuatur''), officially the Republic of Ecuador ( es, República del Ecuador, which literally translates as "Republic of the Equator"; Quechua: ''Ikwadur Ripuwlika''; Shuar: ''Eku .... References External links To USNM Invertebrate Zoology Mollusca CollectionTo World Register of Marine Species Pyramidellidae Gastropods described in 1926 {{Pyramidellidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramidella Corrugata
''Pyramidella corrugata'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.WoRMS (2010). ''Pyramidella corrugata''. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=208420 on 2012-01-12 Description The length of the shell attains 23 mm. The elongated shell is slender and turreted. It is white, with small sparse, scattered yellow spots near the suture. The pointed spire is formed of nine or ten slightly convex whorls, the surface of which is covered with longitudinal folds, also convex, very distinct, smooth, numerous, regular, prolonged even to the summit of the whorls, and accompanied with some small, scattered, yellowish spots. Numerous compressed transverse striae are found between the interstices. The suture is linear. The narrow aperture is ovate, elongated, and slightly narrowed at its extremities. It forms at its base a little depression in an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramidella Adamsi
''Pyramidella adamsi'', common name the Adams' pyram, is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.Rosenberg, G. (2011). ''Pyramidella adamsi'' Carpenter, 1864. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575934 on 2012-01-12Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064 This species was named for Charles Baker Adams (1814-1853), an American naturalist. Description The slender shell has an elongate-conic shape. The early whorls are white, later ones diversely variegated, frequently dark brown, yellowish-brown or purplish-brown on the later turns. It is this striking variegated color pattern which at once distinguishes this species from the other West American forms. The length of the shell varies between 11 mm and 19 mm. The spaces betwe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramidellidae
Pyramidellidae, common name the pyram family, or pyramid shells, is a voluminous taxonomic family of mostly small and minute ectoparasitic sea snails, marine heterobranch gastropod molluscs. The great majority of species of pyrams are micromolluscs. The pyram family is distributed worldwide with more than 6,000 named species in more than 350 nominal genera and subgenera. This family of micromollusks has been little studied and the phylogenetic relationships within the family are not well worked out. There is an absence of a general consensus regarding which species belong to a specific genus or subgenus, contributing to much confusion. Schander (1999) names more than 300 supraspecific names. As there has been no serious generic revision of the genera worldwide, generic polyphyly can be expected to be rampant throughout the family. However, the family itself is deemed monophyletic. However a study in 2011 seems to indicate that this family is deeply nested within the Pulmonata ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramidella Alfredensis
''Pyramidella alfredensis'' is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.MolluscaBase eds. (2022). MolluscaBase. Pyramidella alfredensis Bartsch, 1915. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=588522 on 2022-03-13 Description The milk-white shell has an elongate-conic shape. The 1¾ whorls of the protoconch are very small. They are planorboid, having their axis at right angles to that of succeeding turns. The left side of the nucleus projects considerably beyond the outline of the spire of the teleoconch . The ten whorls of the teleoconch are almost flat and are feebly shouldered at the summit. They are marked by exceedingly fine, retractive, incremental lines, and numerous microscopic spiral striations. The suture is moderately constricted. The periphery of the body whorl is well rounded. The base of the shell is well rounded, decidedly umb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyramidellinae
Pyramidellinae is a taxonomic subfamily of minute sea snails, marine gastropod mollusks in the family Pyramidellidae, the pyrams and their allies. MolluscaBase eds. (2021). MolluscaBase. Pyramidellinae. Accessed through: World Register of Marine Species at: http://marinespecies.org/aphia.php?p=taxdetails&id=224522 on 2021-02-26 Taxonomy It is one of eleven recognised subfamilies of the marine gastropod family Pyramidellidae (according to the taxonomy of Ponder & Lindberg, 1997), which are as follows: Odostomiinae, Turbonillinae, Chrysallidinae, Cingulininae, Cyclostremellinae, Sayellinae, Syrnolinae, Eulimellinae, Pyramidellinae, Odostomellinae and Tiberiinae. 2005 taxonomy In the taxonomy of Bouchet & Rocroi (2005), this subfamily consists of the following tribes, adding the tribe Sayellini containing only two genera ''Sayella'' and ''Petitella''. *Tribe Pyramidellini Gray, 1840 *Tribe Sayellini Wise, 1996 - former subfamily Sayellinae Genera According to Sch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
