Stromboidea
Original Description of Struthiolaria mirabilis by Smith, 1875 , p. 67:
- "Testa ovata, tenuis, imperforata, leviter turrita, alba, epidermide tenuissima fugaci olivaceo-alba amicta ; anfractus 6 1/2, convexiusculi, superne anguste planulati, lente accrescentes, longitudinaliter oblique arcuatimque crebre plicati (plicis inferne ad suturam vix attingentibus); liris spiralibus prominentibus supra plicas undulatis (in anfr. superioribus 7-8, in ultimo circiter 22, illis infra medium simplicibus) succincti; apertura longitudinis totius circiter 4/7 aequans; columella arcuata. Operculum corneum unguiculatum, inferne costis duabus a nucleo unguiformi divergentibus munitum, superne medio longitudinaliter unisulcatum, concentrice striatum. Long. 42 mill., diam. 22."
Locus typicus: Swains Bay, Kerguelen Islands, Territory of the French Southern and Antarctic Lands, southern Indian Ocean
Comment Smith, 1875, p. 67:
- "But a single specimen of this very remarkable shell was obtained by Mr. Eaton. This unfortunately has the labrum so much broken away, that it is impossible to describe the form of the aperture and the nature of the basal channel. However, the animal and operculum agree in all respects externally with Struthiolaria; and although the shell has more the general aspect of Buccinum, there can be no doubt of its true location. The species which compose this genus are strong thick shells; this, on the contrary, is particularly fragile, and clothed with a very thin deciduous epidermis."
Perissodonta mirabilis (Smith, 1875); Holotype; Swains Bay, Kerguelen Islands, Territory of the French Southern and Antarctic Lands, southern Indian Ocean; Ex-coll. Rev. A.E. Eaton, Royal Society Expedition; Coll. BM(NH) no. 1876.8.28.18-19
History and Synonymy
2001
Troncoso et al., 2001, p. 83:
- "ABSTRACT - The present work contributes to the knowledge of the mollusc fauna of the Kerguelen Is., on the basis of a collection of the Institut Royal des Sciences naturelles de Belgique. This collection include 32 species of gastropods and 12 of bivalves collected in shallow waters of the Morbihan Bay, among the gastropods Margarites cf. porcellana and Perissodonta mirabilis are the most abundant, whereas among the bivalves the commonest species are Gaimardia trapesina and Laternula elliptica. Most of the species in this collection have a wide distribution, although some species are endemics of Kerguelen Is. or of the Kerguelen-Heard platform and another species circumantartic."
Troncoso et al., 2001, p. 94:
- "Remarks: This family is restricted to Southern waters and only one species of the genus is living in Antarctic waters; Perissodonta mirabilis. Strebel (1908) records a variety or subspecies called P. mirabilis georgiana from material found in Seymour I. and Powell (1951) maintains this variety based on the opercular variation. Later Powell (1957) considers that differences between Kerguelen and Georgia populations were unsufficient for maintaining the validity of Strebel's variety. Distribution: Type localities are Swain's Bay, Kerguelen (P. m. mirabilis) and Cumberland Bay, South Georgia (P. m. georgiana). Strebel (1908 as P. m. georgiana) finds this species in Seymour I., Powell (1951 as P. m. georgiana) records this species in South Georgia and later in different BANZARE localities in Kerguelen (Powell 1957). Cantera and Arnaud (1985) record it in Kerguelen and Crozet Is. They find P. mirabilis specimens alive in depths of 15 to 3025 m in Kerguelen and point out that it is particularly abundant between 15 and 150 m. In this collection P. mirabilis is the most abundant gastropod and was found in muddy and sandy bottoms with Macrocystis from depths of 30 to 90 m."
Perissodonta mirabilis in Troncoso et al., 2001, p. 89, fig. 13
Specimens from private collections
Perissodonta mirabilis (Smith, 1875); Kerguelen Islands, Territory of the French Southern and Antarctic Lands, southern Indian Ocean; from 400 m; 39 mm; 1985; Coll. Koenraad De Turck
Perissodonta mirabilis (Smith, 1875); Kerguelen Islands, Territory of the French Southern and Antarctic Lands, southern Indian Ocean; from 400 m; Sifty bottom; Coll. Virgilio Liverani
- 50 mm
- 32 mm
References
- Cantera, J. & Arnaud, P.M. 1985. Las gastéropodes prosobranches des Illes Kerguelen et Crozet (de l'Océan Indien) comparison écologique et particularités biologiques; - CNFRA (Comité National Francais des Recherches Antarctiques), 56: 1-169.
- Powell, A.W.B. 1951. Antarctic and Subantarctic Mollusca: Pelecypoda and Gastropoda; - Discovery Reports 26: 47-196, Fulltext
- Powell, A.W.B. 1957. Mollusca of the Kerguelen and Macquarie Islands; - B.A.N.Z. Antarctic Reseach Expedition 1929-1931 Reports B 6: 107-149.
- Powell, A.W.B. 1960. Antarctic and Subantarctic Mollusca; - Records of the Auckland Institute and Museum 5: 117-193.
- E.A. Smith, 1875. Descriptions of some new Shells from Kerguelen's Island; Annals and magazine of natural history : including zoology, botany and geology, ser. 4, vol. 16, 67-72
- Troncoso, N., van Goethem, J.L. & Troncoso, J.S. 2001. Contribution to the marine molluscan fauna of Kerguelen Islands, South Indian Ocean; - Iberus 19(1), 83-114, Fulltext
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