Condylocardiidae (Bivalvia) from Namibia

Authors: M.L. Zettler, L. Hoffman
Basteria, 87 (1): 2-10Published:

Abstract

On the continental slope off Namibia three species of Condylocardiidae were found, including a new species: Condylocardia damara spec. nov. A comparison is made with morphologically similar Condylocardia species from the eastern Atlantic, the south-western Pacific and the southern Indian Ocean. Remarks and distribution notes are given for the two remaining species C. angolensis and Carditella capensis.

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In memoriam: Wim J.M. Maassen (24.x.1946 – 23.x.2021)

Author: R.A. Bank
Basteria, 87 (1): 11-24Published:

Abstract

The malacologist Wim Maassen was an autodidact and citizen scientist, with a primary interest in land- and freshwater molluscs. A short biography is presented; an overview is given of the taxa described by him, as well as a bibliography of his malacological papers. He introduced 119 new taxa, and (co)authored 114 papers over a time span of 55 years. Most of his work is dedicated to former Yugoslavia, Greece, and southeast Asia. His collection of about 30,000 dry samples from 6600 species and 2500 ethanol samples has been included in that of Naturalis Biodiversity Center (Leiden).

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Download articleArtikel In memoriam: Wim J.M. Maassen (24.x.1946 – 23.x.2021)

Description of a new Turritellinella (Caenogastropoda: Turritellidae) from the Middle Miocene of the Central Paratethys Sea

Author: R. Biskupič
Basteria, 87 (1): 25-36Published:

Abstract

A new Paratethyan turritellid gastropod species, Turritellinella devinensis spec. nov., is described from the Upper Badenian (Middle Miocene) marine deposits of the Studienka Formation, Vienna Basin, Slovakia. The shells were found at the fossil-bearing locality near Rohožnik and in several localities situated in the vicinity of Devin (borough of Bratislava) situated on the southern slope of the Devinska Kobyla Hill. T. devinensis spec. nov. is discussed and compared with other morphologically similar species. The habitat of the Badenian populations from the eastern margin of the Vienna Basin is specified and compared with the ecological conditions of extant T. tricarinata in present-day European seas.

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Download articleArtikel Description of a new <em>Turritellinella</em> (Caenogastropoda: Turritellidae) from the Middle Miocene of the Central Paratethys Sea

A review of the present-day Australian species of the gastropod subgenus Rissoina (Rissolina) (Rissooidea: Rissoinidae) with descriptions of two new species

Author: W.J.M. Sleurs
Basteria, 87 (1): 37-76Published:

Abstract

The Australian species of the rissoinid subgenus Rissoina (Rissolina) are reviewed based on the examination of material mainly from the collections of the Australian Museum (Sydney). A total of 15 species is recognized, two of which are new: Rissoina (Rissolina) backeljaui spec. nov. and R. (Rissolina) ponderorum spec. nov. Two species are (re)described using open nomenclature. Lectotypes are selected for R. mercurialis R. B. Watson, 1886 and R. signata O. Boettger, 1893. Some anatomical aspects of R. angasii Pease, 1871, R. duclosi Montrouzier, 1866, R. heronensis (Laseron, 1956) and R. ponderorum spec. nov. are described.

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Download articleArtikel A review of the present-day Australian species of the gastropod subgenus <em>Rissoina</em> (Rissolina) (Rissooidea: Rissoinidae) with descriptions of two new species

Filling large gaps in distribution areas: the Philinidae of NW Spain

Author: J.G.M. Raven
Basteria, 87 (1): 97-106Published:

Abstract

Based on sampling from beaches and shallow water 8 species of Philinidae are recorded from the Cantabrian Sea (NW Spain). Several are first records for NW Spain and/or SW France, filling a large gap in known distribution areas: Philine angulata Jeffreys, 1867, P. denticulata (J. Adams, 1800) and P. intricata Monterosato, 1884. The first records of P. iris Tringali, 2001 from the Cantabrian Sea and western France represent a substantial expansion from its known distribution range. Besides P. quadripartita Ascanius, 1772 all species have shells that are only a few millimetres long which likely caused several to be overlooked. Literature records from deep water bring the total number of species from the study area to 11.

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Download articleArtikel Filling large gaps in distribution areas: the Philinidae of NW Spain

Two tiny streams in Thimphu, with two new gastropods (Caenogastropoda, Rissooidea: Pomatiopsidae and Amnicolidae)

Authors: C. Gyeltshen, A. Gittenberger, E. Gittenberger
Basteria, 87 (1): 107-111Published:

Abstract

In a spring area near Thimphu two species of micro-gastropods were discovered, which are described as new to science here. The endemic Tricula tashiae spec. nov. is next to the more widespread T. montana Benson, 1843, and is the second Tricula species known now from Bhutan. Erhaia benjii spec. nov. is described as the fifth endemic Erhaia species for the country.

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Download articleArtikel Two tiny streams in Thimphu, with two new gastropods (Caenogastropoda, Rissooidea: Pomatiopsidae and Amnicolidae)

Species in Fissurellidae (Gastropoda) from the North Atlantic with a focus on the Azorean seamounts

Authors: L. Hoffman, A. Freiwald
Basteria, 87 (1): 77-96Published:

Abstract

Various reviews of families in Mollusca have indicated a large diversity and a high degree of endemicity on the Azorean seamounts. In this study, bathyal species in the gastropod family Fissurellidae have been investigated using material collected during the M151 cruise conducted by R/V Meteor in 2018 to seamounts south of the Azores. Additional records were incorporated from literature including a review of some species in the subfamily Fissurellinae from the cruise seamount 2 in 1997 and from northern Atlantic species in the collection at Senckenberg am Meer (Wilhelmshaven). Fourteen species are herein reported from the Azorean seamounts of which twelve species were found during M151; Puncturella asturiana (P. Fischer, 1883) and Profundisepta alicei (Dautzenberg & H. Fischer, 1897) were not recorded in this cruise. The distributions of the poorly-known, yet common,

Puncturella fornicata Locard, 1898 and Puncturella agger R. B. Watson, 1883 are presented. Profundisepta luciae spec. nov. is proposed; this species is the only fissurellid endemic to the Azorean seamounts. The degree of endemism in Fissurellidae is much lower (7%) on the Azorean seamounts

than in other recently reviewed species in Veti- and Caenogastropoda (40-100%). Nearly 50 % of the fissurellids have an amphi-Atlantic distribution. It is unclear how most species have distributed over large areas considering their direct or short lecitotrophic larval development. Their relatively large foot to body mass ratio possibly facilitated planktonic rafting and may have enabled long-distance migrations.

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Download articleArtikel Species in Fissurellidae (Gastropoda) from the North Atlantic with a focus on the Azorean seamounts