A new Oestophora (Gastropoda, Eupulmonata, Trissexodontidae) from Ilha da Berlenga, Portugal

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JOURNAL OF THE NETHERLANDS MALACOLOGICAL SOCIETY
VOLUME 79 (1-3) | 1 OCTOBER 2015
Contents
BASTERA VOLUME 79 (1-3) | 1 OCTOBER 2015
Editorial...............................................................................................................................
Bruggen, A.C. van. Hazel Meredith and het contributions to the study of
the land molluscs of Malaŵi ................................................................................
Moorsel, G. van, Faasse, M. & Lengkeek, W. New and rarely reported
gastropods and bivalves on shipwrecks in the Dutch North Sea ........................
Bruggen, A.C. van. Book review ....................................................................................
Margry, C.J.P.J. Insulivitrina lamarckii (A. Férussac, 1821) (Gastropoda,
Pulmonata, Vitrinidae) on the Canary Island of La Palma...................................
Gittenberger, E. Caving for snails in northern Albania..............................................
Hovestadt, A. & Ripken, T.E.J. A new Oestophora (Gastropoda, Eupulmonata,
Trissexodontidae) from Ilha da Berlenga, Portugal...............................................
Kronenberg, G.C. A note on Strombus scalariformis (Caenogastropoda,
Strombidae)..................................................................................................................
Hewitt, S.J. Checklist of marine molluscs from the island of Sint Eustatius,
Leeward Islands, West Indies.....................................................................................
Rolán, E. & Boeters, H.D. The genus Alzoniella Giusti & Bodon, 1984 (Gastro-
poda, Hydrobiidae) in Asturias (northern Spain), with the description of a
new species....................................................................................................................
Landau, B.M., Jansen, A. & Marques da Silva, C. Additions to the gastropod
assemblage of the Pliocene of Estepona, southwestern Spain, 2. The genus
Spiricella Rang, 1828 (Umbraculida; Umbraculidae)...............................................
Guidelines to authors ......................................................................................................
Contents of volume 78.....................................................................................................
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48
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Editorial board
Prof. Dr E. Gittenberger (editor-in-chief),
Dr B. Kokshoorn (layout editor),
G.C. Kronenberg (editor).
Associated editors
Prof. Dr R.A. Bank (terrestrial molluscs),
Dr A.C. van Bruggen (non-marine molluscs),
Prof. Dr G. van der Velde (freshwater molluscs),
Prof. Dr G. Vermeij (fossil and recent marine molluscs),
Dr F. Wesselingh (fossil molluscs).
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A new Oestophora species (Gastropoda, Trissexodonti-
dae) is described on the basis of an accidental find of
19 empty shells from Berlenga Grande, Portugal. In
shell morphology the new species resembles
Oestophora barbula. It can be separated by the lack of
apertural teeth, a wider umbilicus and the presence of
a blunt keel. The name Oestophora barrelsi refers to an
old Dutch name for the archipelago, i.e. the “Barrels”.
Key words: Gastropoda, Eupulmonata, Trissexodontidae,
Oestophora, taxonomy, Europe, Portugal, Berlengas.
Introduction
The Berlengas archipelago is formed by a small group
of islands situated approximately 10-15 km to the west
of Peniche, Portugal. Farilhão Grande and Berlenga
Grande (also known as: Ilha da Berlenga) are the two
largest islands, the latter measures 1000 by 800 metres.
In August 1989, while waiting for the ferry to
Peniche, some empty shells were collected on the
north side of the Carreiro do Mosteiro, which do not
fit the diagnostic criteria of known congeneric species.
Talaván & Talaván (2012) published an excellent
overview of the Iberian Trissexodontidae, in which,
however, no mention is made of the Berlengas. No liv-
ing animals were encountered, but according to the
shell morphology the new species appears to belong
to the genus Oestophora Hesse, 1907.
Systematic part
Oestophora barrelsi spec. nov. (Fig. 1)
Material. – Portugal, Ilha da Berlenga, north side of
Carreiro do Mosteiro, in rubble, between low vegeta-
tion; A. Hovestadt leg. 30.viii.1989 (Naturalis Biodi-
versity Center RMNH.5003978 [holotype];
RMNH.5003979/10 [paratypes]; private collection
Ripken 3 paratypes; private collection Hovestadt
5 paratypes [2867]).
Description. – Shell roughly circular in outline.
Spire slightly elevated. Periphery clearly, but bluntly
angulated. Umbilicus round, but becoming elliptical
at the level of the last whorl, taking up 1/12 to 1/10 of
the shell diameter. Aperture without any teeth or
ridges. Outer lip reflected and solid. A short ridge is
present on the upper side of the last whorl; it is
coloured white, while the rest of the shell is pale
brown. The first 1.5 whorls are more or less smooth,
the postembryonic whorls have close-set ribs, more
pronounced on the upper than on the ventral side,
about 10-12 / mm on the ultimate whorl. Holotype:
maximum width 10.0 mm, minimum width 8.7 mm,
height 4.2 mm. For the largest paratype these meas-
ures are 10.0, 8.0 and 4.2, and for the smallest one 7.9,
6.8 and 3.0 mm, respectively. The holotype has 5¼
whorls.
Etymology: the species is named to commemorate
the old Dutch name for the island, i.e. “de Barrels”.
A new Oestophora (Gastropoda, Eupulmonata,
Trissexodontidae) from Ilha da Berlenga, Portugal
Adriaan Hovestadt
Dr. Abraham Kuyperlaan 22, NL-3818 JC Amersfoort, The Netherlands;
ad.hovestadt@xs4all.nl; Tel. +31[0]651367951 [corresponding author]
& Theo E.J. Ripken
Prinses Margrietlaan 11, NL-2635 JE Den Hoorn (ZH), The Netherlands; theoripken@hotmail.com
Basteria 79 (1-3): 30-31 (2015)
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Hovestadt, A., & Ripken, T.E.J. – New Oestophora from Berlengas, Portugal
Discussion
Oestophora barbula (Rossmässler, 1838) and O. barbella
(Servain, 1880) differ from O. barrelsi by the presence
of apertural teeth. Oestophora lusitanica (L. Pfeiffer,
1841) has a rounded periphery. Caracollina lenticula
(Michaud, 1831) has a more elevated spire and a less
prominent apertural margin, lacking the white ridge
posterior to the aperture.
One specimen of ‘O. barbula’ is reported from Faril-
hão Grande by Daveau (1884: 446). He judged the
shell to be subadult, lacking any teeth, but with a solid
mouth and in all other details O. barbula.Caracollina
lenticula was not found at the time. Fischer (1884) did
not add any new information.
Nobre & Brage (1942: 11) also reported O. barbula,
this time from Berlenga. Albuquerque de Matos (2004;
2013) on the other hand did not mention O. barbula,
but indicated C. lenticula as being relatively abundant
both on Farilhão and Berlenga. The figure (Albu-
querque de Matos, 2013: 179, fig. 143) seems to show
two species, the lower two shells, from Farilhão
Grande, appear to fit the description of O. barrelsi,
while the upper two shells are typical C. lenticula.
References
Albuquerque de Matos, R.M., 2004. Non-marine testaceous Gas-
tropoda of continental Portugal and Berlengas Islands I. Cat-
alogue and bibliography. – Arquivos do Museu Bocage,
Nov. Sér. 4 (1): 1-158.
Albuquerque de Matos, R.M., 2013. Atlas dos caracóis terrestres
e de águas doces e salobras Portugal continental: i-iv, 1-258.
Daveau, J., 1884. Excursion aux iles Berlengas et Farilhões. Avec
notice zoologique sur ces îles par Albert Alexandres Girard.
– Boletim da Sociedade de Geographia de Lisboa 4a, 9: 409-
452.
Fischer, P., 1884. Note sur la faune malacologique des îles
Berlingues (Portugal). – Journal de Conchyliologie 32: 375-
379.
Nobre, A. & Braga, J.M., 1942. Notas sobre a fauna das ilhas
Berlengas e Farilhões. – Memorias e Estudos do Museu Zoo-
logico da Universidade de Coimbra 138: 1-66.
Talaván Serna, J. & Talaván Gómez, J., 2012. Nuevas citas de dis-
tribución de las familias Trissexodontidae, Cochlicellidae y
Helicodontidae (Gastropoda: Pulmonata) en la península
Ibérica e Islas Baleares. – Spira 4: 139-147.
Fig. 1. Oestophora barrelsi spec. nov., holotype, frontal, upper and basal view (Naturalis Biodiversity Center ). Photo by A. Hovestadt.
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