JOURNAL of the NETHERLANDS MALACOLOGICAL SOCIETY VOLUME 82 (1-3) | 15 SEPTEMBER 2018 Xerotricha Conspurcata from Cadzand-Bad, Th
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Basteria_cover_82(1-3):Opmaak 1 8/25/2018 1:39 PM Page 1 Contents JOURNAL OF THE NETHERLANDS MALACOLOGICAL SOCIETY BASTERA VOLUME 82 (1-3) | 15 SEPTEMBER 2018 VOLUME 82 (1-3) | 15 SEPTEMBER 2018 Dekker, H. A note on the genus Rubritrochus (Gastropoda , Vetigastropoda, Trochidae) , with descriptions of five new species ................................................................................... 1 Margry, C.J.P.J. Planellavitrina occulta gen. & spec. nov., a second fossil vitrinid from the Canary Island of La Gomera (Gastropoda, Pulmonata) .................................................... 15 Cianfanelli, S., Bodon, M., Giusti, F. & Manganelli, G. Gomeziella : a new genus for a living fossil (Gastropoda , Pulmonata , Azecidae) ............................................................... 19 Willan, R.C. & Chang, Y.-W. Clarification for the type species of Martadoris Willan & Chang, 2017 (Gastropoda, Nudibranchia, Polyceridae) .................................................... 29 Breure, A.S.H. Book review ........................................................................................................... 31 Xerotricha conspurcata Cad Ée, G.C. Shell repair after serious damage in Ensis leei (Bivalvia, Pharidae) ................... 33 from Cadzand-Bad, Nieulande, F. van An unusually curved Ensis leei (Bivalvia, Pharidae) , a reaction ............. 36 The Netherlands Martínez -Ortí, A. Taxonomic revision of Neohoratia herreroi Bech, 1993 (Gastropoda , (p.43) Hydrobiidae) ............................................................................................................................ 38 Keulen, S.M.A., Majoor, G.D. & Maassen, W.J.M. Xerotricha conspurcata (Draparnaud, 1801), a new species for The Netherlands (Gastropoda, Pulmonata, Hygromiidae) ........................................................................................................................... 43 Mouthon, J., Forcellini, M. & Haaren, T. van Euglesa compressa (Bivalvia, Sphaeriidae) , native of North America , a "hidden" species introduced in Western Europe before 1940 .................................................................................................................. 50 Index to Volume 81 ........................................................................................................................ 55 Basteria_cover_82(1-3):Opmaak 1 8/25/2018 1:39 PM Page 2 Editorial board Prof. Dr E. Gittenberger (editor-in-chief), Dr B. Kokshoorn (layout editor), G.C. Kronenberg (editor). Associated editors Prof. Dr G. van der Velde (freshwater molluscs), Prof. Dr G.J. Vermeij (fossil and recent marine molluscs), Dr F.P. Wesselingh (fossil molluscs). Editorial address Naturalis Biodiversity Center Darwinweg 2, P.O. Box 9517, NL-2300RA Leiden Tel. +31(0)71-5687614, Fax. +31(0)71-5687666, e-mail: [email protected] Membership fees Netherlands Malacological Society (NMV) Author guidelines For subscription, please contact the secretariat of the NMV: [email protected]. For author guidelines, please visit the website at www.basteria.nl Payments can be arranged via bank transfer: IBAN NL69INGB0000288032; BIC/SWIFT: INGBNL2A; in the name of the Nederlandse Malacologische Vereniging. Please mention the subscription code (see table below) with the bank transfer. For other methods of payment, please contact the secretariat. When payment is accomplished before the 1st of March, a € 5,00 discount is granted. For new members the discount applies the whole first year. Subscription The Other European Concerning: Basteria is the peer-reviewed scientific journal of the Netherlands Malacological Society; code Netherlands countries for information and/or subscription please refer to the Hon. Secretary, Basteria B € 30.00 € 37.00 e-mail: [email protected] Basteria + Spirula B+S € 50.00 € 67.00 (postal address: Naturalis Biodiversity Center, P.O. Box 9517, NL-2300RA Leiden, The Netherlands), Basteria + Vita Malacologica B+V € 47.00 € 59.00 or visit the website at www.spirula.nl. Basteria + Vita Malacologica + Spirula B+V+S € 67.00 € 89.00 Spirula S € 30.00 € 40.00 Vita Malacologica V € 25.00 € 30.00 Spirula + Vita Malacologica S+V € 47.00 € 62.00 ISSN-0005-6219 The paper in this journal meets the guidelines for permanence and durability of the Committee on Production Guidelines for Book Longevity of the Council on Library Resources. Printed by High Trade , Zwolle, The Netherlands B2018-03-Keulen:Basteria-2015 8/25/2018 1:34 PM Page 43 Xerotricha conspurcata (Draparnaud, 1801), a new species for The Netherlands (Gastropoda, Pulmonata, Hygromiidae) Stef M.A. Keulen Mesweg 10, NL-6336 VT Hulsberg, The Netherlands; [email protected]; 045-4053602 [corresponding author] Gerard D. Majoor Jekerschans 12, NL-6212 GJ Maastricht, The Netherlands; [email protected] Wim J.M. Maassen Leliestraat 50, Echt, NL-6101 LT Echt, The Netherlands; [email protected] tion occurred at that site . On 7.x.2017 the existence of a 43 For the first time the hygromiid species Xerotricha con - population was confirmed, but in a place different spurcata was found in The Netherlands. Initially in from where the first specimen was collected . 2016 only one live specimen was collected in Cadzand-Bad, province of Zeeland, but in 2017 the ex - Description of Xerotricha conspurcata istence of a population nearby was confirmed. This population lives predominantly on concrete walls bor - Shell. ‒ The shell is wider than high, globular, with a dering the private parking lot of an Italian restaurant. flattened apex (Fig. 2d, e). The shells of fully grown The mild climate in the Netherlands, particularly close specimens , with 4-5 whorls , have a width of 5-6.5 mm to the North Sea coast, and the ongoing climate and a height of 3-4 mm. The whorls are separated by a change may have enabled the survival of this popula - shallow suture. The last whorl of juvenile specimens is tion in Zeeland. somewhat angular. The aperture of adults is oval, slightly broader than high. The margin of the aperture Key words: Pulmonata , Hygromiidae , Xerotricha conspurcata , is sharp and there is no internal thickening. At the um - Cadzand-Bad, first record , Netherlands. bilicus, the margin of the aperture is slightly reflected and partly covers the umbilicus. The umbilicus occu - pies approximately 1/6th of the shell diameter (Fig. Introduction 2f). The shell sculpture consists of irregular fine ribs and growth lines. On 11.ix.2016, in the land-facing dune area northwest The shell is light brown with cream-white elon - of Boulevard De Wielingen in Cadzand-Bad, the first gated radial spots. On the upper side, the spots often author collected one live specimen of an unknown cover the full width of the whorl, forming a pattern of land snail species. On morphological and anatomical radial stripes in parallel to and over the sculpture. On grounds the species was eventually determined as Xe - the lower side, the spots constitute four or five inter - rotricha conspurcata (Draparnaud, 1801) (Fig. 1) . The rupted narrow spiral bands . snail had been found in shady rough herbage, under On both the upper and lower side, shells of juve - dead timber . Because only one specimen had been nile as well as adult live animals are covered with 0.2- found it was important to establish whether a popula - 0.3 mm long, curved hairs which radiate in all Basteria 82 (1-3): 43-49 (2018) B2018-03-Keulen:Basteria-2015 8/25/2018 1:34 PM Page 44 Fig. 1. Live specimen of Xerotricha conspurcata from Cadzand-Bad, The Netherlands . Photograph by Stef Keulen . 44 directions (Fig. 2d-f). Shells may show scars at spots fits both X. conspurcata and X. apicina , but the latter where hairs were abraded (Kerney & Cameron, 1980). species has a cream-white shell with brown spots and According to Welter-Schultes (2012) hairs may also be shorter hairs. Anatomical examination of the genital absent from the shells of fully grown living specimen. tract should provide clarity about the determination Soft parts. ‒ The body colour varies from very light (Giusti & Manganelli, 1989). Hairless shells of X. con - cream-white to almost black. The back and the head of spurcata may be confused with small shells of Cer - the snail are always darker than other parts of the nuella and Candidula species. However, fully grown body and usually very dark brown. The youngest ju - shells of those species usually show an internal thick - veniles are hyaline white with dark tentacles. The re - ening of the aperture, a sculpture of more regular ri - tractor muscles of the tentacles contrast internally as blets and a narrower umbilicus. dark lines. There is a fair chance that another Xerotricha -re - Of two specimens the genital tract was examined. lated species may reach northern Europe: Microxero - The anatomy closely matched the detailed and illus - magna lowei (Potiez & Michaud, 1835). Its distribution trated descriptions by Giusti & Manganelli (1989) and area is comparable to that of both Xerotricha species Hausdorf (1990). Striking are two large protrusions on and it inhabits similar biotopes. Empty and somewhat both sides of the vagina which each contain a large, eroded shells of M. lowei may be difficult to differenti - slightly curved dart (Fig. 3; darts not visible ). ate from those of X. conspurcata . But distinguishing fresh or live specimens is easy as the anatomic differ - Two Xerotricha species in the Netherlands ences are evident (Cardevall & Orozco , 2017). Xerotricha conspurcata may be confused with another Habitat and ecology