Tag Archive for: Mollusca

Occurrence of Adacnarca (Bivalvia: Philobryidae) of Late Pleistocene age from the continental shelf off Namibia and notes on species from South Africa

Authors: Leon Hoffman, Claudia Wienberg, Mark Lisher, Michael L. Zettler
Basteria, 88 (2): 264-270Published:

Abstract

Shells of Adacnarca velaini (E. A. Smith, 1904) in the family Philobryidae (Bivalvia) were encountered on the Namibian continental shelf. The species lived off Namibia during the end of the last glaciation (approximately 42 – 13 ka BP, Late Pleistocene). The shells from Namibia were compared to specimens deposited in the Iziko Museums of South Africa in Cape Town. The South African material contained, in addition to shells of A. velaini, three complete shells of Adacnarca decapitata (Thiele, 1931). This species was incorrectly synonymised but is morphologically distinct from A. velaini by its outline, sculpture and prodissoconch. Adacnarca decapitata is hereby re-established as a valid species.

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Download articleArtikel Occurrence of <em>Adacnarca</em> (Bivalvia: Philobryidae) of Late Pleistocene age from the continental shelf off Namibia and notes on species from South Africa

A new hydrobiid genus and species from Peloponnese (Greece), with a note on Achaiohydrobia (Gastropoda: Hydrobiidae)

Authors: Peter Glöer, Hans-Jürgen Hirschfelder
Basteria, 87 (2): 127-129Published:

Abstract

A new genus and species of Hydrobiidae is described from north central Peloponnese peninsula, Greece: Tridentalia lykaia. Additionally a note on Achaiohydrobia Falniowski, 2021 is given: Achaiohydrobia moreana Hofman & Grego, 2021 is a junior synonym of Bythinella corrosa Glöer & Hirschfelder, 2020.

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Download articleArtikel A new hydrobiid genus and species from Peloponnese (Greece), with a note on <em>Achaiohydrobia</em> (Gastropoda: Hydrobiidae)

New northern Atlantic species of the family Fissurellidae (Gastropoda, Vetigastropoda)

Authors: Leon Hoffman, Bart van Heugten, Jeroen Goud
Basteria, 87 (2): 150-155Published:

Abstract

Four species of the family Fissurellidae were identified from two deep bathyal samples from the Cape Verde Islands and on the Mid-Atlantic Ridge. Cornisepta magna spec. nov. Is described from off Sao Nicolau, Cape Verde islands. Cornisepta microphyma, Profundisepta bipolar spec. nov. and an undescribed species of the genus Fissurisepta were found on the Mid Atlantic Ridge.

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Download articleArtikel New northern Atlantic species of the family Fissurellidae (Gastropoda, Vetigastropoda)

Condylocardiidae (Bivalvia) from Namibia

Authors: Michael L. Zettler, Leon 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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Download articleArtikel Condylocardiidae (Bivalvia) from Namibia

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

Author: Willy 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> (<em>Rissolina</em>) (Rissooidea: Rissoinidae) with descriptions of two new species

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

Authors: Leon Hoffman, André 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

New Diplommatinidae from Sarawak, Malaysia (Borneo), of the genera Opisthostoma W.T. & H.F. Blandford, 1860 and Plectostoma H. Adams, 1865 (Gastropoda: Architaenioglossa: Diplommatinidae)

Authors: Jaap J. Vermeulen, Mohammad Effendi bin Marzuki, Mohd Zacaery Khalik
Basteria, 86 (1): 48-54Published:

Abstract

Six new species of the genera Opisthostoma W.T. & H.F. Blandford, 1860 and Plectostoma H. Adams, 1865 (Architaenioglossa, Diplommatinidae) are described from Sarawak (Malaysia), on the island of Borneo.

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Download articleArtikel New Diplommatinidae from Sarawak, Malaysia (Borneo), of the genera <em>Opisthostoma</em> W.T. & H.F. Blandford, 1860 and <em>Plectostoma</em> H. Adams, 1865 (Gastropoda: Architaenioglossa: Diplommatinidae)

Description of a new Canariella P. Hesse, 1918 (Stylommatophora: Canariellidae) from the Quaternary of Fuerteventura, Canary Islands

Author: Klaus Groh
Basteria, 85 (2): 126-129Published:

Abstract

A new fossil species of the genus Canariella, C. gerti, clas­sified in the subgenus Majorata Alonso & Ibáñez, 2006, is described from Quaternary eolianites from the northwest­ern part of Fuerteventura, Canary Islands. Its relationships to other taxa of the family occurring on the Canary Islands and especially on Fuerteventura are discussed.

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Download articleArtikel Description of a new <em>Canariella</em> P. Hesse, 1918 (Stylommatophora: Canariellidae) from the Quaternary of Fuerteventura, Canary Islands

Results of the Rumphius Biohistorical Expedition to Ambon (1990). Part 18. The Rissoinidae and Zebinidae (Gastropoda: Caenogastropoda)

Authors: Willy J.M. Sleurs, Hermann L. Strack
Basteria, 85 (1): 34-58Published:

Abstract

This paper reviews the Rissoinidae and Zebinidae collected during the Rumphius Biohistorical Expedition to Ambon, in 1990, with additional material collected by the second author (HLS). In all, 30 species belonging to the family Rissoinidae and 12 species belonging to the family Zebinidae are recognised. The wellknown species are listed with a short synonymy and the poorly known species are redescribed in detail and illustrated. The biogeographical relationships of the rissoinid and zebinid fauna from Ambon are briefly discussed.

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Download articleArtikel Results of the Rumphius Biohistorical Expedition to Ambon (1990). Part 18. The Rissoinidae and Zebinidae (Gastropoda: Caenogastropoda)

Rhytidoid land snails collected in 2007 at 21 sites in northern Madagascar, with descriptions of 13 new species and two new subspecies (Gastropoda, Rhytidoidea: Acavidae and Clavatoridae)

Authors: Kenneth C. Emberton, Judicaël A. Rakotondrazafy
Basteria, 84 (4/6): 170-209Published:

Abstract

Collections in 2007 of 634 stations at 21 sites in northern Madagascar yielded 35 species and subspecies of rhytidoid land snails: Ampelita akoratsara akoratsara Emberton, 1999, A. akoratsara paulayi subspec. nov., A. analamerae Ember­ton, 1999, A. andavakoerae spec. nov., A. anjajaviensis spec. nov., A. atropos (Deshayes, 1850), A. capdambrae spec. nov., A. celestinae spec. nov., A. clotho (Deshayes, 1850), A. con­sanguinea (Deshayes, 1850), A. ela spec. nov., A. gaudens (Mabille, 1884), A. granulosa (Deshayes, 1850), A. kendrae spec. nov., A. kirae spec. nov., A. lachesis (Deshayes, 1850), A. lamarei lamarei (L. Pfeiffer, 1846), A. lamarei sakalava (Angas, 1878), A. lincolni spec. nov., A. masoalae Ember­ton, 1999, A. michellae spec. nov., A. miovaova spec. nov., A. niarae spec. nov., A. stilpna (Mabille, 1884), A. thompsoni spec. nov., Eurystyla ambatoensis (Emberton & Griffiths, 2009), E. julii julii (Fischer-Piette & Garreau, 1965), E. julii kely subspec. nov., E. julii soa (Emberton & Griffith, 2009), Paraclavator moreleti (Deshayes, 1851), Embertoniphanta amphibulima (L. Pfeiffer, 1847), E. echinophora (Deshayes, 1850), E. oviformis (Grateloup, 1840), E. josephinae spec. nov., and E. socii (Fischer-Piette, F. Blanc & Salvat, 1975).

Live adults of 17, and tissue samples of 22, of these 35 taxa were collected. The new species bring Madagascar’s total described rhytidoid species to 135. More await discovery, both within Madagascar’s forests and within extensive, unidentified collections from 1995-1996.

Discoveries include: (a) the hairy-shelled Embertoniph­anta echinophora has a broad rainforest distribution and has an isolated, deciduous-forest, sister species, E. joseph­inae spec. nov.; (b) the gigantic (shell height 91.7 mm), micro-endemic Embertoniphanta socii is effectively absent from northern Ankarana; (c) the Eurystyla radiation is much more extensive than previously imagined; (d) south­ern Namoroka Reserve is not the home of its namesake Ampelita namerokoensis Fischer-Piette, 1952 (described from Bemaraha, far to the south!), but of A. thompsoni spec. nov.; (e) A. miovaova spec. nov., as proposed, is one of the most conchologically variable species of land snails; (f) A. lincolni spec. nov. is now the largest known Ampelita (73.5 mm diameter).

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Download articleArtikel Rhytidoid land snails collected in 2007 at 21 sites in northern Madagascar, with descriptions of 13 new species and two new subspecies (Gastropoda, Rhytidoidea: Acavidae and Clavatoridae)

Catalogue of recent type specimens of Polyplacophora (Mollusca) in the Netherlands, including a list of all species present in the Naturalis Biodiversity Center and the Natuurhistorisch Museum Rotterdam

Authors: François J.A. Slieker, Hermann L. Strack, Jeroen Goud
Basteria 84 (4-6): 282-316Published:

Abstract

Type specimens of Polyplacophora present in the collec­tions of the Nationaal Natuurhistorisch Museum, Leiden, formerly Rijksmuseum van Natuurlijke Historie (RMNH), and the Zoölogisch Museum Amsterdam (ZMA), now merged in the Naturalis Biodiversity Center, are listed. In total there is type material of 183 different species, consist­ing of 87 primary types (including 41 pro parte types) and 197 secondary type samples. On two plates are depicted the original coloured drawings of the newly described species by Nierstrasz (1905) published in ‘’Der Chitonen der Siboga Expedition’’. In addition an overview of all recent polypla­cophoran species present in the two major molluscan col­lections in the Netherlands (Naturalis Biodiversity Center and Natuurhistorisch Museum Rotterdam (NMR)) is pre­sented, including localities (country level) and number of samples. The history of the collections from both former RMNH, ZMA and NMR is summarized.

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Download articleArtikel Catalogue of recent type specimens of Polyplacophora (Mollusca) in the Netherlands, including a list of all species present in the Naturalis Biodiversity Center and the Natuurhistorisch Museum Rotterdam

On the discovery of a syntype of Strombus robustus G.B. Sowerby III, 1875 (Caenogastropoda, Strombidae) and its identity

Authors: Gijs C. Kronenberg, Siong Kiat Tan, Martyn E.Y. Low, S.Y. Chan
Basteria, 83 (4/6): 93-101Published:

Abstract

One of the syntypes of Strombus robustus G.B. Sowerby III, 1875 has been discovered in the collection of NHMUK and is designated as lectotype. The status of this species, allocated to Margistrombus Bandel, 2007, is addressed. Both Strom­bus (Dolomena) marginatus sowerbyorum Visser & Man in ’t Veld, 2005 and Margistrombus bouchet Thach, 2016 are junior subjective synonyms of S. robustus. The lectotype of S. robustus and the holotype of respectively S. (D.) m. sow­erbyorum and M. boucheti is illustrated.

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Download articleArtikel On the discovery of a syntype of <em>Strombus</em> <em>robustus</em> G.B. Sowerby III, 1875 (Caenogastropoda, Strombidae) and its identity

Papyridea clenchi spec. nov. and Papyridea curvicostata spec. nov., two new Paper Cockles from tropical America (Bivalvia, Cardiidae), with notes on evolution and dispersal

Author: Jan Johan ter Poorten
Basteria, 83 (4/6): 109-130Published:

Abstract

Papyridea clenchi spec. nov. (Cardiidae) is described from Martinique and compared with the related Papyridea lata (Born, 1778), Papyridea soleniformis (Bruguière, 1789) and Papyridea semisulcata (Gray, 1825). Papyridea curvicostata spec. nov. is described from Ecuador and compared with the related Papyridea hiulca (Reeve, 1845), Papyridea crock­eri (A.M. Strong & Hertlein, 1937) and Papyridea aspersa(G.B. Sowerby i, 1833). Taxonomic relations within the four tropical Atlantic and four tropical eastern Pacific species are analyzed. Distributions of the living species are given. Atlantic-Pacific geminate species pairs are discussed; a pre­dominantly one-way migration (from Atlantic to Pacific) through the Isthmus of Panama is hypothesized. The fossil record of Papyridea is reviewed and the taxonomic position of Profulvia is discussed.

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Download articleArtikel <em>Papyridea</em> <em>clenchi</em> spec. nov. and <em>Papyridea</em> <em>curvicostata</em> spec. nov., two new Paper Cockles from tropical America (Bivalvia, Cardiidae), with notes on evolution and dispersal

New and little-known Pliocardiinae (Bivalvia, Vesicomyidae) from the continental slope off Mauritania

Authors: Leon Hoffman, Rudo von Cosel, André Freiwald
Basteria 83 (4-6): 151-157Published:

Abstract

This study reports four vesicomyid species of the bathyal zone collected in sediment samples off the Mauritanian continental slope. One species is described as new: Isor­ropodon arguinensis spec. nov. Three bathyal species Wai­siuconcha haeckeli, Isorropodon curtum, Callogonia mauri­tanica are already known from Mauritania and all four are most likely endemic to the continental slope of Mauritania.

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Download articleArtikel New and little-known Pliocardiinae (Bivalvia, Vesicomyidae) from the continental slope off Mauritania

Rediscovery of Caecum folini Kisch, 1959 (Gastropoda, Caecidae)

Author: Angelo Vannozzi
Basteria, 83 (4/6): 166-168Published:

Abstract

Caecum folini Kisch, 1959 (= Caecum eburneum de Folin, 1886 non C.B. Adams, 1852) is recorded and illustrated for the first time since its description. Caecum uvea Pizzini, Raines & Vannozzi, 2013 is regarded as a junior synonym of the former.

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Download articleArtikel Rediscovery of <em>Caecum</em> <em>folini</em> Kisch, 1959 (Gastropoda, Caecidae)