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Ptenoglossa Species (Mollusca: Gastropoda) Distributed Along the Turkish Coast of the Aegean Sea

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Ptenoglossa Species (Mollusca: Gastropoda) Distributed Along the Turkish Coast of the Aegean Sea Turk J Zool 32 (2008) 201-211 © TÜB‹TAK Ptenoglossa Species (Mollusca: Gastropoda) Distributed along the Turkish Coast of the Aegean Sea Bilal ÖZTÜRK*, Alper DO⁄AN, Banu B‹TL‹S, Mesut ÖNEN Ege University, Faculty of Fisheries, Department of Hydrobiology, 35100 Bornova, ‹zmir - TURKEY Received: 02.07.2007 Abstract: This study was performed to determine Ptenoglossa species (Mollusca, Gastropoda) distributed along the Turkish coastline of the Aegean Sea. The examination of samples, taken between 1995 and 2005 from various biotopes and depths up to 300 m, yielded 249 specimens and 130 shells, belonging to 33 ptenoglossate species, of which Monophorus thiriotae Bouchet 1984, Similiphora similior (Bouchet and Guillemot 1978), Cerithiopsis diadema Monterosato 1874, Cerithiopsis jeffreysi Watson 1885, Krachia tiara (Monterosato 1874), Punctiscala cerigothana (Sturani 1896), Melanella boscii (Payraudeau 1826), and Nanobalcis nana (Monterosato 1878) were unrecorded from the Turkish coasts. Furthermore, M. thiriotae and K. tiara are new reports for the eastern Mediterranean Sea and the Aegean Sea fauna, respectively. This study also elucidates ecological characteristics of the species found and their distribution along the Turkish coasts. The photographs of newly reported species for the Turkish mollusc fauna are also given. Key Words: Gastropoda, Ptenoglossa, Aegean Sea, ecology, distribution Türkiye'nin Ege Denizi K›y›lar›nda Da¤›l›m Gösteren Ptenoglossa (Mollusca: Gastropoda) Türleri Özet: Bu çal›flma, Türkiye'nin Ege Denizi Ptenoglossa (Mollusca, Gastropoda) türlerini saptamak amac›yla yap›lm›flt›r. 1995-2005 y›llar› aras›nda, 300 m derinli¤e kadar olan de¤iflik bölgelerin farkl› biyotoplar›ndan al›nan örneklerin de¤erlendirilmesi sonucu, bu sistematik kategori kapsam›nda, 33 tür ve bu türlere ait toplam 249 birey ve 130 kabuk tespit edilmifltir. Bu türler aras›nda Monophorus thiriotae Bouchet 1984, Similiphora similior (Bouchet and Guillemot 1978), Cerithiopsis diadema Monterosato 1874, Cerithiopsis jeffreysi Watson 1885, Krachia tiara (Monterosato 1874), Punctiscala cerigothana (Sturani 1896), Melanella boscii (Payraudeau 1826) ve Nanobalcis nana (Monterosato 1878) daha önce k›y›lar›m›zdan bildirilmemifltir. Ayr›ca, M. thiriotae Do¤u Akdeniz ve K. tiara da Ege Denizi faunas› için ilk defa rapor edilmektedir. Bu araflt›rmada, saptanan türlerin ekolojik özelliklerinin yan› s›ra, bunlar›n Türkiye denizlerine göre da¤›l›mlar› da incelenmifltir. Bunlara ek olarak, Türkiye Mollusca faunas› için yeni kay›t türlerin foto¤raflar›na da yer verilmifltir. Anahtar Sözcükler: Gastropoda, Ptenoglossa, Ege Denizi, ekoloji, da¤›l›m Introduction Many studies covering this suborder were conducted, The suborder Ptenoglossa (Gray, 1853) within the especially in the second half of the last century, also order Caenogastropoda, comprises 131 species belonging including some revisions [e.g., Bouchet (1984, 1995), to 53 genera in the Mediterranean Sea, which are mainly Aartsen et al., (1984), Hallgass (1985), Cachia et al., characterised by having a comb-like radula (Giannuzzi- (1996), Fretter and Graham (1982), Bouchet and Warén Savelli et al., 1999). However, according to Warén (1986), Warén (1983, 1988)]. The Mediterranean (1993), some taxa, such as Aclididae and Cimidae, ptenoglossate species have been well represented in a retained in Ptenoglossa in Giannuzzi-Savelli et al., 1999, recently published atlas by Giannuzzi-Savelli et al., should be transferred to the subclassis Heterobranchia, (1999), where 131 species belonging to 53 genera are due to some similarities between the species in this illustrated. In spite of the relatively rich literature on the subclassis (in Giannuzzi-Savelli et al.,1999). ptenoglossate molluscs, there is no detailed information *E-mail: [email protected] 201 Ptenoglossa Species (Mollusca: Gastropoda) Distributed along the Turkish Coast of the Aegean Sea on this group in the eastern Mediterranean, especially in performed on the area between 1995 and 2005 (Figure the Levantine and Aegean Seas, although the checklists 1). Deep water benthic samples (8-300 m) were taken by given by Buzzurro and Greppi (1996), Koutsoubas et al. sampling gears, such as Van Veen Grab, dredge and beam (1997), and Öztürk et al., (2003) mentioned this trawl, whereas the shallow water material (0-8 m) were suborder in the eastern Mediterranean Sea. collected by snorkelling. The sampled material was sieved Ptenoglossate molluscs are heterogeneous regarding with 0.5 mm mesh size and retained fauna was fixed in a to their shell morphology, ecological characteristics, and 5% formalin solution. In the laboratory, ptenoglossate zoogeographic distribution. For example, Metaxia (Delle specimens were separated from the other taxa and examined within a project supported by TUB‹TAK Chiaje, 1828), a genus in the family Triphoridae, have a [Project No: TBAG 2343 (103 T 154)]. The dates, dextral shell, in contrast to the other genera of this family coordinates, depths, and biotopes structures of the distributed in the Mediterranean, which have a sinistral stations (and some substations), where the ptenoglossate shell. According to the relevant references indicated specimens were collected, are indicated in Table 1. On the above (Warén, 1983 and Giannuzzi-Savelli et al., 1999), other hand, together with the distributional aspects of some of the ptenoglossate species are parasites on the determined species along the Turkish seas, the echinoderms (Eulimidae), whereas the others are photographs of the newly reported species for the predators-parasites of Anthozoa (Epitonidae) or Turkish mollusc fauna are also given in Figure 2. inhabiting associated with sponges (Triphoridae). The systematics given follows Gianuzzi-Savelli et al., The majority of the Mediterranean species of (1999) and CLEMAM (Check List of European Marine Ptenoglossa are of Atlanto-Mediterranean origin, but Mollusca). there are also species endemic to the Mediterranean Sea, and the others having boreal and cosmopolitan The studied material is deposited in the Museum of distributions. However, 3 species of this suborder the Faculty of Fisheries, Ege University (ESFM), ‹zmir, distributed in the Mediterranean are alien: Metaxia Turkey. bacillum (Issel, 1869), Cerithiopsis pulvis (Issel, 1869), and Cerithiopsis tenthrenois (Melvill, 1896). Results According to Öztürk and Çevik (2000), only 35 The faunistic analysis of over 150 benthic samples species were reported from the Turkish coasts, of which revealed 249 specimens and 130 shells belonging to 33 24 species were found in the Levantine Sea, 14 species in species, 18 genera, and 6 families. Among the identified the Aegean Sea, and 19 species in the Sea of Marmara. species, Monophorus thiriotae Bouchet 1984, Similiphora Afterwards, Demir (2003), Albayrak (2003), and similior (Bouchet and Guillemot 1978), Cerithiopsis Gönlügür (2005) gave some information on the diadema Monterosato 1874, Cerithiopsis jeffreysi Watson ptenoglossate species, which were newly reported from 1885, Krachia tiara (Monterosato 1874), Punctiscala the Turkish coast. cerigothana (Sturani 1896), Melanella boscii (Payraudeau The objective of this study is to contribute to the 1826), and Nanobalcis nana (Monterosato 1878) have knowledge of Ptenoglossa species in the Aegean Sea, with never been recorded from the Turkish coasts. The an emphasize on the species newly reported for the established species during this study, and their Turkish mollusc fauna. distributional patterns on the Turkish coasts, are given below. TRIPHORIDAE Materials and Methods Marshallora adversa (Montagu, 1803) The majority of the material investigated in this study was collected by the RV Hippocampus in 2000 during a Murex adversus Montagu, 1803 cruise to the Turkish Aegean coastline, which was aimed Material: St. 7, 3 shells; st.17, 2 specimens; st. 21, to determine the biological diversity of the Turkish 3 shells; st. 27.1, 1 specimen; st. 30, 2 shells; st. 31.1, Aegean Sea coast. The remaining material was collected 2 specimens and 1 shell; st. 34, 1 specimen; st. 40.1, 1 during various research projects, with different purposes, specimen and 3 shells; st. 41, 4 specimens and 2 shells; 202 B. ÖZTÜRK, A. DO⁄AN, B. B‹TL‹S, M. ÖNEN 26°E 28°E 40°N 37°N Figure 1. Map of the study area with location of the stations where ptenoglossate species were sampled. st. 42, 1 specimen; st. 44, 3 specimens; st. 49, 1 Distribution: This species has recently been reported specimen; st. 54.1, 1 specimen; st. 54.2, 1 shell. (Öztürk et al, 2007) from the Turkish coastline of the Aegean Sea. Distribution: Levantine Sea (Buzzurro and Greppi, 1996: 6). It is here reported from the Turkish coast of Monophorus perversus (Linnaeus, 1758) the Aegean Sea for the first time. Trochus perversus Linnaeus, 1758 Monophorus erythrosoma (Bouchet and Guillemot, Material: St. 27.2, 1 specimen; st. 31.4, 1 specimen; 1978) st. 51.1, 1 shell. Triphora erythrosoma Bouchet and Guillemot, 1978 Distribution: Levantine Sea (Demir, 2003: 110), Aegean Sea (Kocatafl, 1978: 28-46; Do¤an et al., 2005: Material: St. 6, 1 specimen; st. 18, 1 specimen; st. 145), Sea of Marmara (Ostroumoff, 1896: 60-87; 25.1, 2 specimens and 1 shell. 203 Ptenoglossa Species (Mollusca: Gastropoda) Distributed along the Turkish Coast of the Aegean Sea Table 1. Coordinates, sampling dates, depths, and biotope characterizations of the stations. St Coordinates Date Depth Biotope Sampling Location Lat. Long. 1 40°37'08"N 26°38'17"E 03.08.2000 32 m Muddy sand Dredge Saros Bay 2 40°34'20"N 26°48'26"E 03.08.2000 20 m Sandy mud Dredge Saros Bay 3 40°23'46"N 26°21'46"E 03.08.2000 105 m Muddy sand Dredge Saros Bay 4 40°20'03"N 26°13'12"E 03.08.2000 94 m Muddy sand Dredge Saros Bay 5 40°10'40"N 25°40'50"E 13.08.2000 104 m Mud Dredge Gökçeada 6 40°07'22"N 25°39'50"E 13.08.2000 15 m Sand Dredge Gökçeada 7 40°05'45"N 25°50'45"E 13.08.2000 27 m Posidonia oceanica Dredge Gökçeada Coralligenous sand 8 40°11'17"N 26°15'20"E 02.08.2000 20 m P.
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