Baryspira Fischer, 1883
Onglets principaux
Nomenclature
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Family: AncillariidaeSubfamily: Dipsaccinae
SUMMARY
A genus of medium-sized to larged ancillariids nowadays mainly confined to cold temperate and warm temperate waters of New Zealand and southern Australia (Temperate Australasia realm, Northern New Zealand province, Southern New Zealand province, Southwest Australian Shelf province to West Central Australian Shelf province), Japan and Taiwan (Temperate Northern Pacific realm, Cold Temperate Northwest Pacific province, Warm Temperate Northwest Pacific province) and South Africa (Temperate Southern Africa realm, Agulhas province). Also known from tropical waters in the Central Indo-Pacific realm: Okinawa (South Kuroshio province), New Caledonia (Tropical Southwestern Pacific realm).
Type species is Ancillaria australis Sowerby, 1830, a small species confined to New Zealand (see below).
RV 2148. New Zealand, South Island, Kaikoura.
Although frequently considered to be a junior synonym or subgenus of Amalda Adams & Adams, 1853, that genus is confined to the tropical waters of northern South America (Tropical Atlantic realm, Tropical Northwestern Atlantic province, North Brazil Shelf province) and the warm temperate waters of Brazil (Temperate South America realm, Warm Temperate Southwestern Atlantic province).
Olson (1956) documented the genus from New Zealand and recognised Gemaspira, Spinaspira, Alocospira, Gracilispira and Pinguispira as subgenera. Alocospira is here recognised as a distinct genus. The other genus-group taxa were defined as follows:
| Taxon | Characters | Range in New Zealand | Status |
|---|---|---|---|
| Baryspira s.s. | Medium sized shells with conic spire. Callus pad extending over spire, not over body whorl. | Late Miocene?, Pliocene-Recent. | Valid genus |
| Pinguispira | Squat, small and shortened shells. Callus pad extending over spire, not over body whorl. Otherwise much resembling Baryspira s.s. | Pleistocene-Recent. | Synonym |
| Gracilispira | Small, high-spired. Callus pad extending over spire, not over body whorl. Otherwise much resembling Baryspira s.s. | Upper Oligocene-Recent. | Valid genus |
| Gemaspira | Moderately large to large shells with a conic spire. Moderately thick callus pad of broad extend. | Lower Oligocene-Upper Miocene. | Synonym |
| Spinaspira | Heavy broad shells with low conic spire. Thick, tongue-shaped callus pad extending over body whorl. | Lower Miocene-Pliocene | Valid genus |
Beu (1970) summarised the fossil taxa of New Zealnd and discussed the status of the genus-group taxa, leading to Baryspira with Gracilispira and Spinaspira considered to be subgenera.
Similarly, a lineage of Baryspira is recognised from the Aquitaine Basin, France (Late Oligocene to Miocene) and the western Paratethys. Although it has been suggested that this lineage originates in the Eocene of the Loire Basin, France (Chavan & Fischer, 1939, suggested that Ancillaria douvillei Vasseur, 1882, may be ancestral), the earliest confirmed record seems to be Volutites anomalus Schlotheim, 1820, from the Chattian, Oligocene, of the Aquitaine Basin. That species, in turn, seems to be the presursor of Ancillaria glandiformis Lamarck, 1811, from the Lower Miocene of the Aquitaine Basin. Both taxa also belong to the Gemaspira type.