Bechev, D. & Georgiev, D. (Eds.), Faunistic diversity of Vrachanski Balkan Nature Park. ZooNotes, Supplement 3, Plovdiv University Press, Plovdiv, 2016 The aquatic molluscs (Mollusca: Gastropoda and %ivalvia) of Vrachanski %alkan 1aturȓ Park DILIAN GEORGIEV Abstract. Till now 13 species of aquatic molluscs are known to inhabit the park area: 11 species of snails and 2 species of clams. Even included in the list the species of Grossuana and Radix balthicaKDVWREHVWXGLHGDQDWRPLFDOO\IRUVXUHLGHQWLÀFDWLRQ1LQHVSHFLHVDUHRI FRQVHUYDWLRQVWDWXWHFODVVLÀHGDV´/HDVW&RQFHUQµRU´9XOQHUDEOHµDQGIRXUGRHVQRWKDYH any statute. Three stygobiotic snail species are local endemics. Key words:IUHVKZDWHUPROOXVFVNDUVWLFDUHD%XOJDULD Introduction History of research )LUVWGDWDRQWKHIUHVKZDWHUPROOXVFVRI9UDFKDQVND3ODQLQD0RXQWDLQVDUHDZDV provided by Wagner (1927) describing two new stygobiotic snail species found as empty VKHOOVDW7HPQDWD'XSND&DYHQHDU/DNDWQLN $QJHORY GHVFULEHGDQRWKHUWZRVSHFLHVIURP3HWUHQVNL6SULQJ 8UEDęVNL UHVDPSOHGWKH7HPQDWD'XSND&DYHIRUVW\JRELRWLFVQDLOVDQG found the species described previously by Wagner. 5DGRPDQ UHSRUWHGRQÀQGLQJVRIGrossuana serbica5DGRPDQIURP WKLVSDUWRI6WDUD3ODQLQD0WV %HURQ UHSRUWHGWKHIUHVKZDWHUFODPPisidium personatum0DOPIURP WKH7HPQDWD'XSND&DYH Further research provided data on molluscs of the nearby Iskar River but not from the mountain area (Russev et al5XVVHYHWDO ,QKLVV\QRSVLV$QJHORY FRQVLGHUHGP. bureschi copiosus as junior synonym of P. bureschi. +XEHQRY XQSXEOLVKHGUHSRUW PDGHDV\QRSVLVRIWKHPDODFRIDXQDRIWKH DUHDDQGUHSRUWHGVRPHQHZÀQGLQJVRIIUHVKZDWHUPROOXVFV *HRUJLHY UHVDPSOHGWKH7HPQDWD'XSND&DYHIRUVW\JRELRWLFVQDLOVDJDLQ DQG DPRQJ SUHYLRXVO\ UHSRUWHG VSHFLHV IRXQG DOVR VKHOOV RI Belgrandiella pussila. The author assigned Paladilhiopsis bureschi to the genus Bythiospeum%RXUJXLJQDW Material and Methods A synopsis and a critical overview of the literature concerning the freshwater molluscs of the park area were made. 7KH9UDFKDQVNL%DONDQZDVYLVLWHGWZRWLPHVGXULQJDQGIRUWHUUDLQ survey. The collected shell material was deposited in the collections of the author and the AQUATIC MOLLUSCS 5HJLRQDO1DWXUDO+LVWRU\0XVHXP²3ORYGLY 7KHQRPHQFODWXUHIROORZV*O|HU 0HLHU%URRN &RQVHUYDWLRQVWDWXWHZDV FRQVLGHUHGDFFRUGLQJ&XWWHORGet al. Results and Discussion 2ULJLQDO GDWD UHSUHVHQWHG YHU\ IHZ PROOXVF ÀQGV Ancylus ÁuviatilisZDVÀQGDW 3HWUHQVNL,]YRUEXWBelgrandiella pussila was not collected even after intensive sieving of the spring deposits. The species Bythiospeum bureschi and Belgrandiella hesseiZHUHUH VDPSOHGGXULQJWZRYLVLWVRI7HPQDWD'XSND&DYHEXWQHYHUIRXQGDVOLYHVSHFLPHQV1R DQ\VW\JRELRWLFVQDLOVZHUHIRXQGDW.DOQD0DWQLWVD&DYHEXWPDWHULDORIGrossuana sp. ZDVFROOHFWHGIURPWKHRXWHUVSULQJVRPH\HDUVDJRE\1LNROD\6LPRYDQGSURYLGHGWRWKH author for study. Till now 13 species of aquatic molluscs are known to inhabit the park area: 11 species of snails and 2 species of clams (Table 1). Even included in the list the species of Grossuana and Radix balthica KDV WR EH VWXGLHG DQDWRPLFDOO\ IRU VXUH LGHQWLÀFDWLRQ 3RVVLEO\ WKH Bythinella VSHFLHV LV QHZ WR VFLHQFH DQG DOVR KDV WR EH LQYHVWLJDWHG &DYH malacofauna could provide some other new species inhabiting the subterranean waters. Table 1. $TXDWLF PROOXVFV NQRZQ WR LQKDELW WKH DUHD RI WKH SDUN /HJHQG /& ² /HDVW FRQFHUQ98²9XOQHUDEOH Species Locality Author IUCN Gastropoda Small rivers near Gara Lakatnik Vill.; Valvata piscinalis (Müller, 1774) Hubenov (2007) LC above Vratsa town Holandriana holandrii (C. Pfeiffer, 1828) Small rivers above Vratsa Hubenov (2007) LC Bythinella sp. "Ledenika" complex Hubenov (2007) Wagner (1927); Belgrandiella hessei Wagner, 1927 Temnata Dupka Cave VU 8UEDĔVNL Petrenski Izvor; Temnata Dupka Angelov (1959); Belgrandiella pussilla Angelov, 1959 VU Cave Georgiev (2011) Wagner (1927); Bythiospeum bureschi (Wagner, 1927) Temnata Dupka Cave 8UEDĔVNL VU Georgiev (2011) Spring at "Ledenika" complex; outer Hubenov (2007); Grossuana sp. (?) stream of Kalna Matnitsa Cave present publication Radix balthica (Linnaeus, 1758) (?) Everywhere up to 2500 m a.s.l. Hubenov (2007) LC Radix labiata (Rossmässler, 1835) Everywhere up to 2500 m a.s.l. Hubenov (2007) LC Galba truncatula (Müller, 1774) Everywhere up to 2500 m a.s.l. Hubenov (2007) Many localities up to 2300 m a.s.l.; Hubenov (2007); $QF\OXVÀXYLDWLOLVMüller, 1774 Petrenski Izvor at Petrenska River present publication Bivalvia One of the commonest species at the Pisidium casertanum (Poli, 1791) Hubenov (2007) LC mountains, springs and caves Beron (1994); Pisidium personatum Malm, 1855 Temnata Dupka Cave LC Hubenov (2007) AQUATIC MOLLUSCS 1LQH VSHFLHV DUH RI FRQVHUYDWLRQ VWDWXWH FODVVLÀHG DV ´/HDVW &RQFHUQµ RU ´9XOQHUDEOHµDQGIRXUGRHVQRWKDYHDQ\VWDWXWH7KHWKUHHVW\JRELRWLFVQDLOVSHFLHVDUH local endemics. Acknowledgements. , DP JUDWHIXO WR 'U 1LNROD\6LPRY 1DWLRQDO 1DWXUDO +LVWRU\ 0XVHXP6RÀD IRUWKHGrossuana²VSHFLPHQVSURYLGHGIURPWKHRXWHUVWUHDPRI.DOQD 0DWQLWVD&DYH References $QJHORY$ 1HXH*DVWURSRGHQDXVGHQXQWHULUGLVFKHQ*HZlVVHUQ%XOJDULHQVArchiv für Molluskenkunde $QJHORY $ 1HXH +\GURELLGDH DXV +|KOHQJHZlVVHUQ %XOJDULHQV Archiv für Molluskenkunde $QJHORY $ Mollusca (Gastropoda et Bivalvia) aTuae dulcis, catalogus Faunae Bulgaicae3HQVRIW %DFNKX\V3XEO6RILD/HLGHQSS %HURQ 3 Résultats des recherhes biospéléologiTues en Bulgarie de 11 j 1 et liste des animaux cavernicoles bulgares 7UDQWHHYD )pGpUDWLRQ EXOJDUH GH VSpOpRORJLH6RILDSS &XWWHORG$6HGGRQ0 1HXEHUW( European Red List of Non-marine Molluscs. ,8&1 *OREDO 6SHFLHV 3URJUDPPH ,8&1 5HJLRQDO 2IILFH IRU (XURSH ,8&1 6SHFLHV 6XUYLYDO&RPPLVVLRQSS *HRUJLHY ' 1HZ ORFDOLWLHV RI IRXU %XOJDULDQ +\GURELLGDH VSHFLHV *DVWURSRGD Risooidea). Zoonotes *O|HU3 0HLHU%URRN& Süsswassermollusken – Ein Bestimmungsschlüssel für die Bundesrepublik Deutschland 'HXWVFKHU -XJHQGEXQG IU 1DWXUEHREDFKWXQJ +UVJ +DPEXUJQHXEHDUEHLWHWH$XIODJHSS 5DGRPDQ 3 Hydrobioidea a superfamily of Prosobranchia (Gastropoda). I. Systematics0RQRJUDSKV6HUELDQ$FDGHP\RI6FLHQFHVDQG$UWV 'HSDUWPHQW RI6FLHQFH SS 5XVVHY % 3HWURYD $ -DQHYD , $QGUHHY 6 'LYHUVLW\ RI ]RRSODQNWRQ DQG ]RREHQWKRV LQ WKH 'DQXEH 5LYHU LWV WULEXWDULHV DQG DGMDFHQW ZDWHU ERGLHV ,Q %XOJDULD·VELRORJLFDOGLYHUVLW\&RQVHUYDWLRQVWDWXV1HHGV$VVHVVPHQW6RILD3HQVRIW 8UEDęVNL- %HLWUlJH]XU0ROOXVNHQIDXQD%XOJDULHQV H[FO&ODXVLOLLGDH Bulletin de la Société des Amis des Scienes et des Lettres de Poznaę6HULH' :DJQHU $ 6WXGLHQ ]XU 0ROOXVNHQIDXQD GHU %DONDQKDOELQVHO PLW EHVRQGHUHU %HUFNVLFKWLJXQJ %XOJDULHQV XQG 7KUD]LHQV QHEVW PRQRJUDSKLVFKHU %HDUEHLWXQJ HLQ]HOQHU*UXSSHQAnnales Zoologici Muzei Polonici Historaie Naturalis 5XVVHY%<DQHYD,'HFKHYD5 .DUDSHWNRYD0 Limnologia na balgarskite dunavski pritotsi (Limnology of the Bulgarian Danube tributaries .QL]KHQ 7LJDU 3XEOSS ,Q%XOJDULDQ +XEHQRY = Tip Mollusca, Fauna na priroden park “Vrachanski Balkan” (Phylum MolluscaFauna of “Vrachanski Balkan” Natural Park 2VQRYHQGRNODGL$QQH[, QHSXEOLNXYDQGRNODG 0DLQUHSRUWDQG$QQH[8QSXEOLVKHGUHSRUW ,Q%XOJDULDQ AQUATIC MOLLUSCS Author’s address: ',/,$1*(25*,(9 'HSDUWPHQWRI(FRORJ\DQG(QYLURQPHQWDO&RQVHUYDWLRQ 8QLYHUVLW\RI3ORYGLY7]DU$VVHQ6WU %*3ORYGLY%XOJDULDGLOLDQJHRUJLHY#DEYEJ ǿșȎȒȘȜȐȜȒțȖȠȓ ȚȓȘȜȠȓșȖ țȎ ǽȞȖȞȜȒȓț ȝȎȞȘ ǰȞȎȥȎțȟȘȖ ǯȎșȘȎț DzǶǹȍǻDZdzǼǾDZǶdzǰ (ǾȓȕȬȚȓ) ǶȕȐȓȟȠțȖȟȎȜȏȧȜȟșȎȒȘȜȐȜȒțȖȐȖȒȎȚȓȘȜȠȓșȖȜȠȠȓȞȖȠȜȞȖȭȠȎțȎȝȎȞȘȎ ȐȖȒȎȜȣșȬȐȖȖȐȖȒȎȚȖȒȖDzȐȎȐȖȒȎ GrossuanaVSȖRadix balthica ȟȎȝȜȒȐȨȝȞȜȟ ȝȜȞȎȒȖșȖȝȟȎțȎȎțȎȠȜȚȖȥțȖȖȕȟșȓȒȐȎțȖȭȎȓȒȖțȐȖȒ Bythinella VS ȐȓȞȜȭȠțȜȓțȜȐ ȕȎ țȎȡȘȎȠȎ DzȓȐȓȠ ȜȠ ȐȖȒȜȐȓȠȓ ȟȎ ȟ ȘȜȞȟȓȞȐȎȤȖȜțȓț ȟȠȎȠȡȠ Ȑ ,8&1 ȘȎȠȓȑȜȞȖȭ ´/HDVW &RQFHUQµȖșȖ´9XOQHUDEOHµ .