Two specimens of the holo-planktonic gastropod Janthina globosa Swainson, 1822 (Janthinidae) were collected by M. Legac in the waters around the island of Rab. This constitutes a new finding of this uncommon species in the northern part of the Croatian coast.Dva primjerka holoplanktonskog puža Jantina globosa Swainson, 1822 (Janthinidae) sakupila je M. Legac u području otoka Raba. To je novi nalaz ove rijetke vrste na sjevernom dijelu hrvatske obale

Henk K. Mienis

Mirjana Legac

Dva primjerka holoplanktonskog puža Jantina globosa Swainson, 1822 (Janthinidae) sakupila je M. Legac u području otoka Raba. To je novi nalaz ove rijetke vrste na sjevernom dijelu hrvatske obale.Two specimens of the holo-planktonic gastropod Janthina globosa Swainson, 1822 (Janthinidae) were collected by M. Legac in the waters around the island of Rab. This constitutes a new finding of this uncommon species in the northern part of the Croatian coast

Legac, Mirjana

Mienis, Henk K.

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short communication/kratko priop}enjeNEW FINDING OF JANTHINA GLOBOSASWAINSON, 1822 (MOLLUSCA, GASTROPODA)IN THE EASTERN PART OF THE ADRIATIC SEAMIRJANA LEGAC1 & HENK K. MIENIS21Natural History Museum Rijeka, Lorenzov prolaz 1, HR-51000 Rijeka, Croatia2National Natural History Collections, Berman Building, Hebrew University,IL-91904 Jerusalem, IsraelLegac, M. & Mienis, H. K.: New finding of Janthina globosa Swainson, 1822 (Mollusca,Gastropoda) in the eastern part of the Adriatic Sea. Nat. Croat., Vol. 19, No. 1, 245–248, 2010,Zagreb.Two specimens of the holo-planktonic gastropod Janthina globosa Swainson, 1822 (Janthinidae)were collected by M. Legac in the waters around the island of Rab. This constitutes a new findingof this uncommon species in the northern part of the Croatian coast.Key words: Gastropoda, Janthinidae, Janthina globosa, Adriatic SeaLegac, M. & Mienis, H. K.: Novi nalaz Janthina globosa Swainson, 1822 (Mollusca, Gastro-poda) u isto~nom dijelu Jadranskog mora. Nat. Croat., Vol. 19, No. 1, 245–248, 2010, Zagreb.Dva primjerka holoplanktonskog pu`a Jantina globosa Swainson, 1822 (Janthinidae) sakupila jeM. Legac u podru~ju otoka Raba. To je novi nalaz ove rijetke vrste na sjevernom dijelu hrvatskeobale.Klju~ne rije~i: Pu`, Janthinidae, Janthina globosa, Jadransko moreFor the eastern part of the Adriatic coast the first findings of holo-planktonicgastropods were reported by BRUSINA (1866): Janthina bicolor Menke and J. nitensMenke. Both species were collected by Ivan E. Kuzmi} in the heaps of sea grassleaves deposited ashore around the islet of Lokrum near Dubrovnik. In 1868 he do-nated the shells to S. Brusina (BRUSINA, 1907). These specimens are still kept inmalacological collection of the Croatian Natural History Museum in Zagreb (ILIJA-NI] & STO[I], 1972). BRUSINA (1872) recorded that specimens of J. prolongata Menkecollected in Dubovadol (the island of Hvar) formed part of the collection of L.Stalio. Today this locality is probably known as Dubovica (GAMULIN, 1981).SABELLI et al. (1990) noted that J. bicolor Menke 1828 is a junior synonym of J.janthina (Linnaeus, 1758). According to MIENIS (1994) J. janthina is indeed a seniorsynonym of J. bicolor Menke, 1828, while J. nitens Menke, 1828 has to be regarded asNAT. CROAT. VOL. 19 No 1 245–248 ZAGREB June 30, 2010Croatian Natural History Museum, Demetrova 1, Zagreb, Croatiaa junior synonym of J. globosa Swainson, 1822. Probably we can also consider J.prolongata found at the island of Hvar to be a synonym since J. prolongata (deBlainville, 1822), the real author of that name and not Menke, is a synonym of J.globosa Swainson, 1822. BOUCHET et al. (2001) cited J. nitens Menke, 1828, while thevalid name J. globosa Swainson, 1822 was noted by CLEMAM (2007).Two specimens of J. globosa (Fig. 1) have been collected by M. Legac at the local-ity Zad [kolji}, Lopar (the island of Rab) on 29th August 1961. After a strongnorth-eastern wind (in Croatian named »bura«) the waves tossed gastropod shellson the sandy shore along with the torn off sea grass Cymodocea nodosa. The size ofthe shells is 13.5 and 15.5 mm. The specimens are kept in malacological collectionof the Natural History Museum Rijeka (Inv. No. 2225). On the check list for the is-land of Rab LEGAC (1974) erroneously quoted the species J. janthina (Linnaeus,1758), instead of correctly J. globosa Swainson, 1822.According to MIENIS & SPANIER (1987) four species of Janthina are present in theMediterranean Sea: J. janthina (Linnaeus, 1758), J. exigua (Lamarck, 1816), J. globosaSwainson, 1822, and J. pallida Thompson, 1841. They are all living in a similar pe-lagic way i.e. adhered to a float, which snails construct by means of mucus-coveredair bubbles. Usually they are associated with swarms of certain anthomedusae likePorpita and Velella, and siphonophoran Physalia on which they feed. All these pe-lagic organisms, including Janthina, are typical inhabitants of the open sea. Onlyunder certain weather conditions such swarms enter more or less closed seas likethe Adriatic Sea. However, J. janthina is always the dominant species, followed at alarge distance by J. globosa, and by even less numbered J. exigua and J. pallida.MILI[I] (1991) omitted to quote exact finding localities of J. globosa but he consid-ered that this species (named J. nitens) is poorly distributed in the Adriatic. Accord-246 Legac, M. & Mienis, H. K.: New finding of Janthina globosa in the eastern part of the AdriaticFig. 1. Janthina globosa Swainson, 1828. Both shells are lodged in the Mollusc collectionof Natural History Museum Rijeka – Inv. Nr. 2225 (Photo: L. Bartoni~ek).ing to VIO & DE MIN (1996) the species was found in the Gulf of Trieste and it iscited as a rare species for the Slovenian coast by DE MIN & VIO (1997).Like all other Janthina-species, J. globosa also has a circum-equatorial distributionpattern (Mienis, 1994).ACKNOWLEDGEMENTSWe express our gratitude to V. [tamol (Croatian Natural History Museum, Za-greb) for completing the reference list. We thank M. Kova~i} (Natural History Mu-seum Rijeka) for the help with the preparation of the manuscript.Received February 16, 2010REFERENCESBRUSINA, S., 1866: Contribuzione pella fauna dei Molluschi Dalmati. Verh. zool.-bot. Ges.Wien 16, 1–134.BRUSINA, S., 1872: Naravoslovne crtice sa sjevero-isto~ne obale Jadranskog mora. Dio prvi,Putopis. Rad Jugosl. akad. zn. umjet., 19, 105-177.BRUSINA, S., 1907: Naravoslovne crtice sa sjevero-isto~ne obale Jadranskog mora. IV i posljed-nji. Specijalni. XIII. Prilog za faunu {koljka{a Dalmacije i Jadranskog mora. Rad Jugosl.akad. zn. umjet., 171, 43-228.BOUCHET, P., J. LE RENARD & S. GOFAS, 2001: Mollusca. In: COSTELLO, M. J., C. S. EMBLOW & R.WHITE (eds) European register of marine species. A check-list of the marine species in Eu-rope and bibliography of guides to their identification. Mus. natl. Hist. nat., Paris, Patri-moines naturels, 50, 180-213.CLEMAM, 2007: http//www.somali.asso.fr/clemam/biotaxis.php?X=14579DE MIN, R. & E. VIO, 1997: Molluschi conchiferi del litorale Sloveno. Annales ser. hist. nat. 11(4), 214-258.GAMULIN, T., 1981: Rije~ za Makarsku, njenu »Planinu« i »More«. Acta Biokovica 1, 17-22.ILIJANI], V. & M. STO[I], 1972: Popis zbirke meku{aca (Mollusca) Spiridiona Brusine. Hrvatskinarodni zoolo{ki muzej Zagreb, 6, 86 pp.LEGAC, M., 1974: Prilog poznavanju litoralne flore i faune otoka Raba. Vijesti muzeal. i konzerv.Hrv., 23 (5-6), 75-85.MIENIS, H. K., 1994: New information concerning Janthina in the eastern Mediterranean (Mol-lusca, Gastropoda, Janthinidae). Plankton Newsletter, 19, 12-13.MIENIS, H. K. & E. SPANIER, 1987: A review of the family Janthinidae (Mollusca, Gastropoda)in connection with the Tekhelet dye. In E. SPANIER (ed.): The Royal Purple and the BiblicalBlue Argaman and Tekhelet. The study of Chief Rabbi Dr. Isaac Herzog on the dye indus-tries in Ancient Israel and recent scientific contributions, 197-205, plt. H. Keter PublishingHouse, Jerusalem.MILI[I], N., 1991: [koljke i pu`evi Jadrana. Logos, Split, 302 pp.VIO, E. & R. DE MIN, 1996: Contributo alla conoscenza dei molluschi marini del Golfo diTrieste. Atti Mus. civ. Stor. nat. Trieste 47, 173-233.Nat. Croat. Vol. 19(1), 2010 247SA@ E TAKNovi nalaz Janthina globosa Swainson, 1828 (Mollusca, Gastropoda)u isto~nom dijelu Jadranskog moraM. Legac & H. K. MienisVrsta Janthina globosa Swainson, 1828 prvi puta je zabilje`ena za isto~nu obaluJadrana sredinom 19. stolje}a u podru~ju oto~i}a Lokrum kod Dubrovnika. Podru~jeZad [kolji}, Lopar (otok Rab) novi je nalaz ove rijetke vrste splavara u sjevernomdijelu hrvatske obale. Dva primjerka sakupila je M. Legac 29. kolovoza 1961. godi-ne. Nakon jedne jake bure valovima su ku}ice toga planktonskog pu`a izba~ene napjeskovitu obalu zajedno s morskom resom Cymodocea nodosa. Veli~ine ku}ica iznose13,5 i 15,5 mm. Primjerci su pohranjeni u malakolo{koj zbirci muzeja (Inv. br. 2225).Ranije su ovi primjerci bili pogre{no odre|eni kao J. janthina (Linnaeus). Sve vrsteroda Janthina imaju cirkumekvatorijalnu rasprostranjenost.248 Legac, M. & Mienis, H. K.: New finding of Janthina globosa in the eastern part of the Adriatic

Novi nalaz Janthina globosa Swainson, 1822 (Mollusca, Gastropoda) u istočnom dijelu Jadranskog mora

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