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Aplexa Prisca
''Aplexa'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, Aquatic animal, aquatic pulmonate gastropod mollusks in the family Physidae. Shell description These small snails are quite distinctive, because they have gastropod shell, shells that are sinistral, which means that if you hold the shell such that the spire is pointing up, then the aperture is on the left-hand side. The shells of ''Aplexa'' species have a long and large Aperture (mollusc), aperture, a relatively high and pointed Spire (mollusc), spire, and no Operculum (gastropod), operculum. The shells are thin and corneous and rather transparent. Species Species in the genus ''Aplexa'' include: * ''Aplexa atava'' White, 1877 * ''Aplexa brevispirata'' (Cossmann, 1913) * ''Aplexa disjuncta'' (White, 1879) * ''Aplexa elongata'' (Say, 1821) - the lance aplexa * ''Aplexa gigantea'' (Michaud, 1837) * ''Aplexa grasseti'' (Matheron, 1878) * ''Aplexa heberti'' (Deshayes, 1863) * ''Aplexa hypnorum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the Aperture (mollusc), aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group. Shell layers The gastropod shell has three major layers secreted by the Mantle (mollusc), mantle. The calcareous central layer, ostracum, is typically made of calcium carbonate (CaCO3) precipitated into an organic matrix ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aplexa Grasseti
''Aplexa'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. Shell description These small snails are quite distinctive, because they have shells that are sinistral, which means that if you hold the shell such that the spire is pointing up, then the aperture is on the left-hand side. The shells of ''Aplexa'' species have a long and large aperture, a relatively high and pointed spire, and no operculum. The shells are thin and corneous and rather transparent. Species Species in the genus ''Aplexa'' include: * '' Aplexa atava'' White, 1877 * '' Aplexa brevispirata'' (Cossmann, 1913) * '' Aplexa disjuncta'' (White, 1879) * '' Aplexa elongata'' (Say, 1821) - the lance aplexa * '' Aplexa gigantea'' (Michaud, 1837) * '' Aplexa grasseti'' (Matheron, 1878) * '' Aplexa heberti'' (Deshayes, 1863) * '' Aplexa hypnorum'' (Linnaeus, 1758) - the moss bladder snail * '' Aplexa jaimei'' (Hermite, 1879) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aplexa Rivalis
''Aplexa rivalis'' is a species of small air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Physidae, a family which are sometimes known as the bladder snails. Description ''Rivalis Aplexa'' has a thin shell levorotatory, featuring a large oval opening with parietal callus lip sharp and wide. The tentacles are filiform and foot is very long in the back. Ovigerous masses are constituted by transparent oval eggs variable number embedded in a gelatinous mass.Martínez E, Rafael y Miranda A, Rafael E. 1968. Aspectos de la reproducción en moluscos pulmonados del área metropolitana de Caracas. En: Estudio de Caracas. Ecología vegetal - fauna Vol:II pp:123=165. Universidad Central de Venezuela. Caracas-Venezuela. Distribution This species occurs in: * BrazilMartins R. T. & Alves R. da G. 2008''Occurrence of Naididae (Annelida: Oligochaeta) from three gastropod species in irrigation fields in southeastern Brazil'' Biota Neotropica, 8(3), * Venezuel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aplexa Ricei
''Aplexa'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. Shell description These small snails are quite distinctive, because they have shells that are sinistral, which means that if you hold the shell such that the spire is pointing up, then the aperture is on the left-hand side. The shells of ''Aplexa'' species have a long and large aperture, a relatively high and pointed spire, and no operculum. The shells are thin and corneous and rather transparent. Species Species in the genus ''Aplexa'' include: * '' Aplexa atava'' White, 1877 * '' Aplexa brevispirata'' (Cossmann, 1913) * '' Aplexa disjuncta'' (White, 1879) * '' Aplexa elongata'' (Say, 1821) - the lance aplexa * '' Aplexa gigantea'' (Michaud, 1837) * ''Aplexa grasseti'' (Matheron, 1878) * '' Aplexa heberti'' (Deshayes, 1863) * '' Aplexa hypnorum'' (Linnaeus, 1758) - the moss bladder snail * '' Aplexa jaimei'' (Hermite, 1879) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aplexa Prisca
''Aplexa'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, Aquatic animal, aquatic pulmonate gastropod mollusks in the family Physidae. Shell description These small snails are quite distinctive, because they have gastropod shell, shells that are sinistral, which means that if you hold the shell such that the spire is pointing up, then the aperture is on the left-hand side. The shells of ''Aplexa'' species have a long and large Aperture (mollusc), aperture, a relatively high and pointed Spire (mollusc), spire, and no Operculum (gastropod), operculum. The shells are thin and corneous and rather transparent. Species Species in the genus ''Aplexa'' include: * ''Aplexa atava'' White, 1877 * ''Aplexa brevispirata'' (Cossmann, 1913) * ''Aplexa disjuncta'' (White, 1879) * ''Aplexa elongata'' (Say, 1821) - the lance aplexa * ''Aplexa gigantea'' (Michaud, 1837) * ''Aplexa grasseti'' (Matheron, 1878) * ''Aplexa heberti'' (Deshayes, 1863) * ''Aplexa hypnorum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aplexa Primigenia
''Aplexa'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. Shell description These small snails are quite distinctive, because they have shells that are sinistral, which means that if you hold the shell such that the spire is pointing up, then the aperture is on the left-hand side. The shells of ''Aplexa'' species have a long and large aperture, a relatively high and pointed spire, and no operculum. The shells are thin and corneous and rather transparent. Species Species in the genus ''Aplexa'' include: * '' Aplexa atava'' White, 1877 * '' Aplexa brevispirata'' (Cossmann, 1913) * '' Aplexa disjuncta'' (White, 1879) * '' Aplexa elongata'' (Say, 1821) - the lance aplexa * '' Aplexa gigantea'' (Michaud, 1837) * ''Aplexa grasseti'' (Matheron, 1878) * '' Aplexa heberti'' (Deshayes, 1863) * '' Aplexa hypnorum'' (Linnaeus, 1758) - the moss bladder snail * '' Aplexa jaimei'' (Hermite, 1879) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
