Boll. Malacol., 43 (1-8): 33-38(2007) Lepidopleurus dmicoides (Monterosato, 1879) and Lepidochitona furtiva (Monterosato, 1879): two new reports for the Polyplacophora (Mollusca) fauna of the Aegean Sea Bilal Oztiirk*1 (El), Alper Dogan*2 Mesut Òneri*3 & Cem Qevik# , * EgeUniversity, Faculty Abstract ofFisheries, Dept. This studywas carried out along the Turkish Aegean coast in the years 2000-2003. From samples taken from Hydrobiology, 35100 various depths (3-220 m) and biotopes, a total of 129 individuals belonging to 10 Polyplacophoran species B1orbniolvaal-.lozzmtiurr,[email protected] weredetermined: Lepidopleuruscimicoides(Monterosato, 1879), Lepidopleurusbeduini(Dell'Angelo& Palazzi, (q)Corresponding 1986), Hanleyahanleyi(Bean in Thorpe, 1844), Callochitonseptemvalvis(Montagu, 1803), Lepidochitonacine- Author rea (Linnaeus, 1767), Lepidochitona furtiva (Monterosato, 1879), Lepidochitona monterosatoi Kaas & van 2 [email protected] Belle, 1981, Chiton olivaceus Spengler, 1797, Chiton corallinus (Risso, 1826) and Acanthochitona fascicularis 3 [email protected] (Linnaeus, 1767). Of these, Lepidopleurus cimicoides and Lepidochitona furtiva are reported for the first time from theAegean Sea and Hanleya hanleyifrom theAegean coastofTurkey Distinctiveand ecological charac- . * Cukurova University, teristics ofLepidopleuruscimicoidesand Lepidochitona furtiva are considered in thisstudy. Data aboutthe oc- FacultyofFisheries, Dept. currenceoftheother Polypacophoran species in thestudied area arealso reported. Marine Biology, 01330, Balcali-Adana,Turkey, Riassunto [email protected] Questo lavoro riporta I risultati di ricerche effettuate lungo la costa egea della Turchia negli anni 2000- 2003. Dallo studio di campioni prelevati a varie profondità (3-220 m) e da vari biotopi, risulta un totale di 129 esemplari, appartenenti a 10 specie di Polyplacophora: Lepidopleurus cimicoides (Monterosato, 1879), Lepidopleurusbeduini{Dell'Angelo & Palazzi, 1986), Hanleya hanleyi {Bean in Thorpe, 1844), Callo- chiton septemvalvis (Montagu, 1803), Lepidochitona cinerea (Linnaeus, 1767), Lepidochitona furtiva (Monterosato, 1879), Lepidochitona monterosatoi Kaas & van Belle, 1981, Chiton olivaceus Spengler, 1797, Chiton corallinus (Risso, 1826) e Acanthochitona fascicularis (Linnaeus, 1767). Di queste specie, Le- pidopleurus cimicoides e Lepidochitona furtiva vengono segnalate per la prima volta per il Mar Egeo, ed Hanleya hanleyiper le coste egee della Turchia. In questo studiovengono prese in considerazione i caratte- ri distintivi e quelli ecologici di Lepidopleurus cimicoides e Lepidochitona furtiva. Per le altre specie vengo- no riportati dati di distribuzione nell'area studiata. I Key Words Mollusca, Polyplacophora, Aegean Sea, Turkey. introduction cies new to Aegean Sea fauna, which were collected from various depths offtheTurkish coasts. The Aegean Sea is a transition zone between the Black Sea and the Mediterranean, which forms a favorable Material and Methods ecosystem for several different taxa due to the geogra- phical and topographical characters of the coastline and Samplings were conducted along the Turkish Aegean the sea bottom. However, only less than half of the Sea coast between 2000 and 2003 on board the R/V K. nearly 2000 molluscan species inhabiting the Mediter- Piri Reis, R/V Egestif and R/V Hippocampus at va- ranean has been reported from the Aegean Sea. This rious localities. The material examined was obtained fact probably stems from the relatively less research using dredge and beam trawl from algae, Posidonia ocea- conducted along theAegean Sea coast, when compared nica (L.) Delile, 1813, sand, mud and coralligenous bio- to the rest of the Mediterranean. Pioneering informa- topes at depths ranging between 3 and 220 m. Skin di- tion on the Polyplacophoran fauna of the Aegean Sea ves werecarried outat stations no. 11 and 14. The mate- mm are based on studies of Deshayes (1832) and Forbes rial was washed through a sieve with 0.5 mesh size (1844). However, detailed researches were mostly car- and fixed in 4% formalin. Specimens were sorted under ried out within the last three decades, i.e. Kattoulas et a stereomicroscope in the laboratory. During the sorting al. (1973); Kaas & Van Belle (1987); Strack (1988, 1990); process, representatives of Polyplacophora were obser- Zenetos & van Aartsen (1995); Oztiirk et al. (2000) and ved in 25 sampling stations (Fig. 1 and Tab. 1), and the- Koukouras & Karachle (2005), where a total of 16 Poly- se Polyplacophora specimens were studied within the placophoran species was recorded from the Aegean framework of a project supported by TUBITAK (The Sea, out of 32 species known to inhabit the Mediterra- Scientific and Technical Research Council of Turkey, nean Sea (Dell'Angelo & Smriglio, 1999 and Koukouras project codeTBAG 2343 (103T154). The materialscollec- & Karachle, 2005). ted were deposited in the ESFM museum (Ege Univer- This study aims to present two Polyplacophoran spe- sity,Turkey). MARMARA SEA Bilal Oztürk, Alper Dogan, Mesut Oneri & Cem Cevik Fig. 1. Mapofthestudiedareawith locationofthestationswhere Polyplacophoraspeciesweresampled. Fig. 1. Mappadell'areastudiata ed ubicazionedellestazionidallequalisonostateraccoltespeciedi Polyplacophora. Results presence of 129 specimensbelonging to 10 species (Tab. 2). Apart from Lepidopleurus cimicoides (Monterosato, The examination of the material collected from 25 sam- 1879) and Lepidochitona furtiva (Monterosato, 1879), 34 pling stations at depths ranging 3 to 113 m revealed the which are new records for the Aegean Sea, all the spe- St. Date Coordinates (N) Coordinates (E) Biotopes Depth (m) 1 13.08.2000 40° 10' 00" N 25°59’ 15" E Sand 29 2 13.08.2000 40° 04' 45” N 25° 10’ 50" E Sand 29 3 13.08.2000 40° 05’ 45" N 25° 50' 45" E P. oceanica 27 4 13.08.2000 39°58' 50" N 26° 03' 25" E Muddy sand 30 5 20.07.2000 39 27’ 10" N 26° 07' 00" E Sand 70-90 6 28.07.2000 39° 00' 10" N 26°44' 28" E Sand 50 7 22.11.2002 38° 53' 28" N 26° 58' 34" E Mud 50 8 06.10.2001 38° 40' 43" N 26° 44' 14" E P. oceanica 3 9 01.09. 2003 38° 32' 15" N 26° 39' 44" E Muddysand 38 Lepidopleurus 10 a) 18.03.2000 38° 29' 44" N 26° 39' 13" E P. oceanica 9-16 b) 17.06.2001 cimicoides 11 20.07.2001 38° 22’ 07" N 26°46' 25" E P. oceanica 3 12 13. 09. 2000 38° 25' 20" N 26° 30’ 24" E P. oceanica 11-35 13 13.09.2000 38° 24' 22" N 26° 29' 19" E Mud + Sand + P. oceanica 38 (Monterosato, 14 22.02.2001 38° 23’ 56" N 26° 27' 26" E P. oceanica 6 1 15 14.09.2000 38° 20’ 48" N 26° 14' 15" E Muddy sand 54 879) 16 14. 09.2000 38° 09’ 30" N 26° 17' 40" E Sand 113 and 17 17.09.2000 36° 56' 45" N 27° 16' 32" E Algae+sand 31 18 18.09.2000 36° 59' 00" N 27° 32' 35" E Mud 47 Lepidochitona 19 18.09.2000 36° 59' 50" N 27° 42' 20" E P. oceanica 5-10 20 18.09.2000 36° 59’ 30" N 27° 47' 56" E Coralligenoussand 64 furtiva 21 19.09.2000 36° 48’ 30" N 28° 03' 00" E P. oceanica 17-25 22 20.09.2000 36° 47’ 58" N 27° 4P 25" E Algae 51 (Monterosato, 23 20.09.2000 36° 39’ 50" N 27° 32' 30" E Muddy sand 86 1 24 21.09.2000 36° 45’ 08" N 27° 47' 00" E Algae + P. oceanica + Sand 26 879): 25 21.09.2000 36° 40’ 03" N 28° 00' 15" E Algae 40 two new Tab. 1. Coordinates, depths, sampling datesand biotopecharacterization ofstations. Tab. 1. Coordinate, profondità, datadicampionamentoecaratteristichedel biotopodellestazionicampionate. reports for cies obtained were previously recorded from the area. Distribution the In addition, Hanleya hanleyi (Bean in Thorpe, 1844), m Observed at depths rangingbetween 29 and 113 atva- which was reported earlier from the Greek coasts by Strack (1990), is a new record for theTurkish Polyplaco- (riWouSsahbairoat)o,pedsi.ffDeirsetnrtiblouctaelditiinestihnetEhaestWeersntAetrlnanMteidcitOecreraan- Polyplacophora phoran fauna. nean, Sicily and central part of theAdriaticSea (Dell'An- gelo & Smriglio, 1999). The species is here reported for Lepidopleuruscimicoides (Monterosato, 1879) thefirsttimefromtheEasternMediterranean. (Mollusca) Fig. 2 Lepidochitonafurtiva (Monterosato, 1869) fauna Chiton cimicoides Monterosato, 1879: 23 nomen novum ( Fig. 3 of pro Chiton minimus Monterosato, 1878) the Lepidopleurus intermedins Salvini-Plawén, 1968:251, PI. 6- Chiton furtivus Monterosato, 1879: 19-20 (type locality: 8, figs. 44-57 Palermo, Sicily, 20-30 m) Aegean Sea Material Material In table2 St. 8, 1 specimen, P. oceanica, 3 m. 35 Stations Species Specimens Biotopes Depth (m) (seefig.1) LEPIDOPLEURIDAE Lepidopleuruscimicoides(Monterosato, 1879) 6 Algae 51 22 14 Sand 29-113 2,5, 16 3 Sand+algae 31 17 13 Muddysand 38-86 4,9, 15,23 2 Mud 47-54 7, 15, 18 2 Mud +Sand+P. oceanica 38 13 Lepidopleurusbedullii(Dell'Angelo&Palazzi,1986) 2 Algae+P. oceanica +Sand 26 24 1 P. oceanica 16 10a Bilal HANLEYIDAE Oztürk, Hanleyahanleyi(BeaninThorpe, 1844) 1 Coralligenoussand 64 20 1 Mud 50 7 Alper ISCHNOCHITONIDAE Dogan, Callochitonseptemvalvis (Montagu, 1803) 5 P. oceanica 27 3 Lepidochitonacinerea (Linnaeus, 1767) 15 P. oceanica 3-9 10h, 11, 14 Mesut Lepidochitonafurtiva (Monterosato, 1879) 1 P. oceanica 3 8 O&nen LepidochitonamonterosatoiKaas&Van Belle, 1981 13 P. oceanica 17-25 19,21 CHITONIDAE Cem Chiton oliváceasSpengler, 1797 5 Sand+algae 31 17 Qevik 21 P. oceanica 11-35 12, 19,21 Chiton corallinus (Risso, 1826) 2 Muddysand 86 23 1 P. oceanica 11-35 12 ACANTHOCHITONIDAE Acanthochitonafascicularis (Linnaeus, 1767) 4 Algae 40 25 2 Coralligenoussand 2 20 2 Mud +Algae 31 17 13 P. oceanica 11-35 12,21,24 Tab. 2. Polyplacophoraspecies, numberofspecimensand distribution inthebiotopes, depthsandsampledstations. Tab. 2. Elencodellespeciedi Polyplacophora, numerodiesemplari, distribuzione nei biotopi, profonditàastazioni di reperimento. Distribution Discussion The species generally inhabits P. oceanica meadows, at The Mediterranean Polyplacophoran species occur in depths of 1-40 m. Reported from the Western and Cen- different biotopes, within a large depth range from 0 to tral Mediterranean (Dell'Angelo & Smriglio, 1999; Ca- 1000 m (Dell'Angelo & Smriglio, 1999). Since the mate- ciaia et al., 2004). The species is here reported for the rial of this study was obtained from relatively deep lo- first time from the Eastern Mediterranean. calities - except for a few sampling stations - and the L. cimicoides L.cancellatus Characters (Presentstudy) (in Dell'Angelo & Smriglio,1999) Sculptureoftegmentum Granules separate, 1st plate and post mu- Granulesjoined,formingradialstripeson cronal of 8th plate areas and lateral parts the 1st postmucronalareaof8thplateand , ofintermediateplatesquinconce, forming the lateral parts of intermediate plates, longitudinal stripes at the central area of and longitudinal stripes at the central intermediateplates areaofintermediateplates Shapeofapicalareaofintermediate (Seefig. 2, e) Middle part of the apical area swollen, plates extending more or less parallel to poste- rioredges Bladeofincinateplate Tricuspidate(Fig. 2 f) Monocuspidate Tab. 3. SomedistinguishingcharacteristicsbetweenLepidopleuruscimicoidesandL. cancellatus. 36 Tab. 3. AlcunicaratteridistintivitraLepidopleuruscimicoideseL. cancellatus. Lepidopleurus cimicoides (Monterosato, Fig. 2. Lepidochitona cimicoides: a. Dorsal viewof a specimen, b, c, d. Dorsal viewof I, IVand VIII plates, e. Ventral viewof plate IV, f. Trlcuspldate bladeofthe uncinateplate(the radula'ssecond lateralteeth). 1879) Fig. 2. Lepidochitona cimicoides: a. Vista dorsale di un esemplare, b, c, d. Vista dorsale delle piastre I, IV e Vili, e. Vista ventrale della piastra IV, f. and Laminatricuspidatadella placca uncinata(secondodente radulare laterale). shallow water and hard bottom substrate samplings are mediate plates. Dell'Angelo & Forli (1996:43,45) repor- Lepidochitona insufficient, some species that werepreviously reported ted that the shape of the valves in this species presents by Strack (1988, 1990); Tringali & Villa (1990); Óztiirk et some similarities with the valves of the fossil Pliocene al. (2000) and Koukouras & Karachle (2005) from the Lepidochitona verrucosa Dell'Angelo & Forli, 1996. L.fur- furtiva Greek and Turkish coasts of the Aegean Sea could not tiva lives between the leaves of P. oceanica, a few centi- be sampled. However, the two species, L cimicoides and metres above theroots (Strack, 1988). Lfurtiva, are included for the first time to the Aegean (Monterosato, Sea Polyplacophoran fauna. Lepidopleurus cimicoides is a small sized species; the speci- mens examined in this study had lengths ranging bet- 1879): ween 1.8 and 3.1 mm. Due to their similar size and mor- two phologies, this specieswas sometimesmisidentified as L. new cancellatus in earlier studies, which is a very rare species in the Mediterranean Sea (Dell'Angelo, pers. comm.). reports The distinguishing characters between these two species weregiven in detail by Dell'Angelo& Smriglio (1999:37), for where the blade of the uncinate plate (second lateral the teeth of the radula) is tricuspidate in L. cimicoides (Fig. 2 f) and monocuspidate in L. cancellatus. Tire location of Polyplacophora the tegmentum granules and the general shape of the apical area of the intermediate plates are other distincti- vefeaturesbetween thesetwospecies (Tab. 3). Only a single specimen of L.furtiva was encountered in (Mollusca) this study. Although a live specimen of the species has not been observed in the Aegean Sea until now, an in- fauna termediate plate of this species was found along the of Datcacoast (southernAegeanSea,Turkey) (Dell'Angelo the pers. comm.) and an illustration was given by Dell'Angelo & Smriglio (1999:152). The tegmentum of Aegean L. furtiva is completely smooth (although in Fig. 3 it seems to be granulated because of colour spots). Only Sea weak radial stripes exists on the tegmentum, which are Fig. 3. L. furtiva(3.6x 1.9 mm). especially more distinct on the lateral areas of the inter- Fig. 3. L. furtiva(3,6x 1,9 mm). 37 : H. hanleyiwaspreviouslyreported from theAegeanSea Strack H., 1988. The distribution of Chitons (Polyplacopho- by Strack (1990), and is now added to the Turkish Po- ra)inGreece.Apex,3(4):67-80. lyplacophoran fauna. The two juvenile specimens de- Strack H., 1990. The distribution of Chitons (Polyplacopho- termined in this study had lengths of 2.5 and 1.7 mm. ra)inGreece: addendum.Apex,5(1-2):13-15. Tringali R. & Villa R., 1990. Rinvenimenti malacologici dal- This species generally occurs at depths between 50-100 le coste turche (Gastropoda, Polyplacophora, Bivalvia). No- m, incoralligenousbiotopesand muddydetritus. tiziarioC.I.S.Ma, 12:33-41. In summarizing the results wenoticed thatoutof the 18 Zenetos A. & Van Aartsen 1995. The deep sea mollu- J.J., Polyplacophoranspecies occuring in theAegeanSea so- scan fauna of the S.E. Aegean Sea and its relation to the me prefer a distinct type of habitat in shallow waters, neighbouring faunas. Bollettino Malacologico, [1994], 30 (9- i.e. L caprearum, L. cinerea and L. furtiva, while species 12): 253-268. like L cimicoides, L. africanas and C. corallinus show a much wider range. 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