Binneyidae
| Binneyidae | ||||||||||||
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Hemphillia glandulosa |
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| Scientific name | ||||||||||||
| Binneyidae | ||||||||||||
| Cockerell , 1891 |
The Binneyidae are a small family of nudibranchs from the suborder of land snails (Stylommatophora). Almost ten species and subspecies are currently known. The probably oldest representatives of the Binneyidae come from the Upper Eocene / Oligocene ( Palaeogene ) of Montana and British Columbia .
features
The representatives of the family only partially reduced the housing . It has only a few turns, is flat-ear-shaped or flat and predominantly not covered by the mantle. It sits on its back, but the animal can no longer withdraw into the housing in the adult stage. The condition can be referred to as the "half-slug" stage. The viscera forms a hump on the back or extends into this hump, but not into the tail behind the coat. The sole is undivided or divided into three. Throat muscles and tentacle retractor muscles converge in the rear part and attach to the diaphragm. The genital apparatus lies at the rear end of the intestinal cavity. The penis and epiphallus are normally developed.
Geographical distribution
The few species in the family are found exclusively in northwestern and western North America. Deposits are from the Columbia River region ( Oregon ), of Vancouver Iceland , western Montana , Channel Islands ( California ) and Baja California ( Baja California known).
Systematics
Schileyko (2007) lists the taxon as a subfamily of the slugs (Arionidae). The family Binneyidae contains only three genera, of which the position of one genus in this family is still questionable.
- Family Binneyidae Cockerell, 1891
- Genus Binneya Cooper, 1863 (with the subgenus Binneya (Binneya) Cooper, 1863 and Binneya (Allothyra) Pilsbry, 1948)
- Genus Hemphillia Bland & Binney, 1872
- Genus? Gliabates Webb, 1959
swell
Individual evidence
- ↑ Harold G. Pierce: Late Eocene-Oligocene nonmarine mollusks of the northern Kishenehn Basin, Montana and British Columbia. Annals of Carnegie Museum, 70 (1): 1-112, Pittsburgh, PA 2001 ISSN 0097-4463
literature
- Philippe Bouchet & Jean-Pierre Rocroi: Part 2. Working classification of the Gastropoda . Malacologia, 47: 239-283, Ann Arbor 2005 ISSN 0076-2997
- Anatolij A. Schileyko: Treatise on Recent terrestrial pulmonate molluscs, Part 15 Oopeltidae, Anadenidae, Arionidae, Philomycidae, Succineidae, Athoracophoridae. Ruthenica, Supplement 2 (15): 2049-2210, Moscow 2007 ISSN 0136-0027