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Spergo Castellum
''Spergo'' is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae. Description The large, thin shell is nearly destitute of sculpture. It shows an unrecurved columella, a short, wide, straight siphonal canal, a wide shallow emargination representing the anal notch, and generally feeble anal fasciole, except in the very young. There is a sharp outer lip, unarmed aperture, and a sinusigera protoconch. The animal has a muzzle formed by a stout squarely truncated rostrum opening into a capacious pharynx, provided internally with a degenerate proboscis not capable of extrusion beyond the oral orifice, with a poison gland and a degenerate radula. Eyes are present and functional. The tentacles are low-seated, stout, and clavate. The operculum is absent. The dentition resembles that of Bela. This form resembles ''Pleurotomella'', Verrill, from which it differs in the character of the rostrum and pharynx, in the possession of eyes, in its straight wide s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. '' Panthera leo'' (lion) and '' Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurotomella
''Pleurotomella'' is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae. Description (Original description by Verrill) As at present understood, this genus is intended to include those species which have a rather broad and very distinct subsutural band, crossed by excurved lines of growth corresponding to the form of the posterior sinus of the lip, which is situated a little below the suture and is always pretty well-developed, but is sometimes broad and shallow, and at other times narrower and very deep. The outer lip is always thin and sharp, without any appearance of a varix, nor is there any deposit of callus on the body whorl, in front of the aperture. The siphonal canal is well developed, generally constricted at the base and somewhat elongated, and usually but slightly curved. In a few of the species, doubtfully referred to hie genus, it is short and wide. The columella-margin is more or less sinuous. The protoconch differs in sculpture, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spergo Tenuiconcha
''Spergo'' is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae. Description The large, thin shell is nearly destitute of sculpture. It shows an unrecurved columella, a short, wide, straight siphonal canal, a wide shallow emargination representing the anal notch, and generally feeble anal fasciole, except in the very young. There is a sharp outer lip, unarmed aperture, and a sinusigera protoconch. The animal has a muzzle formed by a stout squarely truncated rostrum opening into a capacious pharynx, provided internally with a degenerate proboscis not capable of extrusion beyond the oral orifice, with a poison gland and a degenerate radula. Eyes are present and functional. The tentacles are low-seated, stout, and clavate. The operculum is absent. The dentition resembles that of Bela. This form resembles ''Pleurotomella'', Verrill, from which it differs in the character of the rostrum and pharynx, in the possession of eyes, in its straight wide s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spergo Sibogae
''Spergo sibogae'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.MolluscaBase eds. (2022). MolluscaBase. Spergo sibogae Schepman, 1913. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=436258 on 2022-06-19 Description The length of the shell attains 54 mm, its diameter 18 mm. (Original description) The rather strong, fusiform shell is yellowish-brown. The protoconch is wanting. The 9 remaining whorls are moderately convex, slightly excavated below the conspicuous but shallow suture. The sculpture consists of remote, oblique, axial ribs, conspicuous in the upper whorls, fainter lower on, disappearing on the back of the body whorl. They form tubercles below the excavation, which in the upper whorls bear short plicae, just below the suture. The lower part of the whorls is crossed by very numerous spiral striae, conspicuous in upper whorls, faint on the last one, but stronger towards a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spergo Parvidentata
''Spergo'' is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae. Description The large, thin shell is nearly destitute of sculpture. It shows an unrecurved columella, a short, wide, straight siphonal canal, a wide shallow emargination representing the anal notch, and generally feeble anal fasciole, except in the very young. There is a sharp outer lip, unarmed aperture, and a sinusigera protoconch. The animal has a muzzle formed by a stout squarely truncated rostrum opening into a capacious pharynx, provided internally with a degenerate proboscis not capable of extrusion beyond the oral orifice, with a poison gland and a degenerate radula. Eyes are present and functional. The tentacles are low-seated, stout, and clavate. The operculum is absent. The dentition resembles that of Bela. This form resembles ''Pleurotomella'', Verrill, from which it differs in the character of the rostrum and pharynx, in the possession of eyes, in its straight wide s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spergo Parunculis
''Spergo parunculis'' is a species of sea snail, a marine gastropod 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). . 39 ....MolluscaBase (2019). MolluscaBase. Spergo parunculis Stahlschmidt, Chino & Fraussen, 2015. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=850511 on 2020-01-01 Description The shell reaches a length of 84 mm. Distribution This marine species occurs in the Mozambique Channel. References * Stahlschmidt P., Chino M. & Fraussen K. (2015). ''A new Spergo species (Conoidea: Raphitomidae) from the Mozambique Channel''. Miscellanea Malacologica. 7(1): 9-12. External links Gastropods.com: ''Spergo parunculis''Criscione, F.; Hallan, A.; Fedosov, A.; Puillandre, N. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spergo Nipponensis
''Spergo nipponensis'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description Distribution This marine species occurs off Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north .... References * Okutani, T. & Iwahori, A. (1992) ''Noteworthy gastropods collected from bathyal zone in Tosa Bay by the R/V Kotaka-Maru in 1987 and 1988''. Venus, 51, 235–268. External links * nipponensis Gastropods described in 1992 {{Raphitomidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spergo Glandiniformis
''Spergo glandiniformis'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell reaches 40 mm. (Original description) The large, slender shell is glandiniform, with a typical brown sinusigera protoconch of 3½ whorls, followed by 8 normal whorls. The color is pale madder brown, more or less zoned in harmony with lines of growth, and with a peripheral and basal spiral paler band feebly indicated. The columella in the young is stained with a darker brown, or pinkish white in the full-grown shell. The spire is rather pointed. The apical whorls are sculptured with incised spiral grooves below the shoulder and with numerous small oblique riblets over which the grooves run. The space between the shoulder and the suture behind it is slightly impressed, smooth, or crossed by distant low sharp wrinkles, very narrow and not corresponding to the ribs. All this sculpture becomes rapidly obsolete, and on the greater part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spergo Fusiformis
''Spergo fusiformis'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell varies between 75 mm and 122 mm. Distribution This marine species occurs off Madagascar, New Caledonia, China Sea and Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ... References * Habe T. (1961). Coloured illustrations of the shells of Japan (II). Hoikusha, Osaka. xii + 183 + 42 pp., 66 pls. * Sysoev, A.; Bouchet, P. (2001). Gastéropodes turriformes (Gastropoda: Conoidea) nouveaux ou peu connus du Sud-Ouest Pacifique = New and uncommon turriform gastropods (Gastropoda: Conoidea) from the South-West Pacific. in: Bouchet, P. et al. (Ed.) Tropical deep-sea benthos. Mémoires du Muséum national d'Histoire naturelle. Série A, Zoo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spergo Castellum
''Spergo'' is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae. Description The large, thin shell is nearly destitute of sculpture. It shows an unrecurved columella, a short, wide, straight siphonal canal, a wide shallow emargination representing the anal notch, and generally feeble anal fasciole, except in the very young. There is a sharp outer lip, unarmed aperture, and a sinusigera protoconch. The animal has a muzzle formed by a stout squarely truncated rostrum opening into a capacious pharynx, provided internally with a degenerate proboscis not capable of extrusion beyond the oral orifice, with a poison gland and a degenerate radula. Eyes are present and functional. The tentacles are low-seated, stout, and clavate. The operculum is absent. The dentition resembles that of Bela. This form resembles ''Pleurotomella'', Verrill, from which it differs in the character of the rostrum and pharynx, in the possession of eyes, in its straight wide s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spergo Aithorrhis
''Spergo aithorrhis'' is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae. Description The length of the shell reaches 120 mm. Distribution This marine species occurs off the Philippines, the Norfolk Ridge and New Caledonia ) , anthem = "" , image_map = New Caledonia on the globe (small islands magnified) (Polynesia centered).svg , map_alt = Location of New Caledonia , map_caption = Location of New Caledonia , mapsize = 290px , subdivision_type = Sovereign st ... References * Sysoev, A. & Bouchet, P., 2001. ''New and uncommon turriform gastropods (Gastropoda: Conoidea) from the south-west Pacific.'' Mémoires du Muséum national d'Histoire naturelle 185: 271-320 External links * MNHN, Paris: holotypeCriscione, F.; Hallan, A.; Fedosov, A.; Puillandre, N. (2021). Deep Downunder: Integrative taxonomy of Austrobela, Spergo, Theta and Austrotheta (Gastropoda: Conoidea: Raphitomidae) from the deep sea of Australia. Journal of Zoological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
