Bulla ampulla, copyright Erwin Köhler.

Belongs within: Euopisthobranchia.

Bulla is a genus of relatively large bubble snails with a well-developed shell into which the animal is able to withdraw completely. Shells of the various species are largely very similar in appearance, leading to taxonomic confusion in the genus.

Characters (from Malaquias & Reid 2008): Shell ovoid, solid, mottled in drab colours. Spire involute. Aperture slightly longer than shell height. Cephalic shield produced antero-laterally, forming pair of siphon-like tentacles. Penis invaginable, formed by a long duct continuous with coiled prostate, ending in a narrow terminal blind caecum; all structures enclosed in thick muscular sheath, contiguous with a long tubular vestibular area; retractor muscle attached to proximal area of penial sheath. Anterior gonoduct slightly helicoid; fertilization chamber rounded, located at mid-length; seminal receptacle placed antero-ventrally, attached to wall of common genital duct. Rachidian tooth broad, denticulate, with central cusp usually smaller. Large gap between rachidian and laterals. Inner lateral claw-shaped, usually symmetrical with major central cusp and 3–4 lateral cusps on either side. Outer lateral with smooth vertical internal edge and denticulate convex outer edge with 4–10 cusps; base with denticle. Second outer lateral teeth reduced, plate-like. Gizzard plates uncalcified, smooth, with longitudinal keel.

<==Bulla Linnaeus 1758 (see below for synonymy)BR05
    |--*B. ampulla Linnaeus 1758BR05 [=*Bullaria ampullaO27, *Vesica ampullaBR05]
    |--B. adamsi Menke 1850 [=Bullaria adamsi]H09
    |--B. ambigua Gmelin 1791F27b
    |--B. ‘ambigua’ d’Orbigny 1842 non Gmelin 1791F27b
    |--‘Bullaria’ australisF27a
    |--B. canaliculata Linnaeus 1758L58
    |--B. coffea Linnaeus 1758L58
    |--B. cranchiiL64
    |--B. cypraea Linnaeus 1758L58
    |--B. elongata Phillips 1835F27b
    |--B. frankovichi Petuch & Sargent 2011PMB15
    |--B. gibbosa Linnaeus 1758L58
    |--‘Bullaria’ gouldiana Pilsbry 1893O27
    |--B. incincta Mighels 1844J49
    |--B. jugularis Conrad 1855C64
    |--B. liasina Deslongchamps 1869TTE93
    |--B. livida Linnaeus 1758L58
    |--B. marmorea Pease 1861 [=B. peasiana Pilsbry in Tryon 1893, B. peaseana (l. c.)]K65b
    |--B. nebulosa [incl. B. fulminosa]C64
    |--B. occulta Mighels & Adams 1842J49
    |--B. pallida Linnaeus 1758L58
    |--B. pertenius Mighels 1843J49
    |--B. petrosaC64
    |--B. propinquaU79
    |--B. punctulata Adams 1850 [=Bullaria punctulata]H09
    |--‘Bullaria’ quoyana Dall 1919 [=Bulla quoyi Adams 1850 non Gray 1843]O27
    |--B. quoyi Gray 1843 [=Bullaria quoyi]F27a
    |--B. spelta Linnaeus 1758L58
    |--B. striata [incl. B. maculosa, B. media, B. umbilicata]G79
    |--‘Bullaria’ tenuissimaM54
    |--B. utriculusN79
    |--B. vesicaria Lightfoot 1786K65a
    `--B. zonata Lightfoot 1786K65a

Bulla Linnaeus 1758 [=Bullaria Rafinesque 1815 non DC. 1805 (ICBN), Vesica Swainson 1840; Bullariidae, Bullinacea, Bullinae, Vesicidae]BR05

*Type species of generic name indicated


[BR05] Bouchet, P., & J.-P. Rocroi. 2005. Classification and nomenclator of gastropod families. Malacologia 47 (1–2): 1–397.

[C64] Carpenter, P. P. 1864. Supplementary report on the present state of our knowledge with regard to the Mollusca of the west coast of North America. Report of the British Association for the Advancement of Science 33: 517–686.

[F27a] Finlay, H. J. 1927a. A further commentary on New Zealand molluscan systematics. Transactions and Proceedings of the New Zealand Institute 57: 320–485.

[F27b] Finlay, H. J. 1927b. New specific names for austral Mollusca. Transactions and Proceedings of the New Zealand Institute 57: 488–533.

[G79] Guppy, R. J. L. 1879. First sketch of a marine invertebrate fauna of the Gulf of Paria and its neighbourhood. Part I.—Mollusca. Journal of Conchology 2: 151–172.

[H09] Hedley, C. 1909. The Marine Fauna of Queensland: Address by the President of Section D. Australasian Association for the Advancement of Science: Brisbane.

[J49] Johnson, R. I. 1949. Jesse Wedgwood Mighels with a bibliography and a catalogue of his species. Occasional Papers on Mollusks 1 (14): 213–231.

[K65a] Kay, E. A. 1965a. The Reverend John Lightfoot, Daniel Solander, and the Portland Catalogue. Nautilus 79 (1): 10–19.

[K65b] Kay, E. A. 1965b. Marine molluscs in the Cuming collection, British Museum (Natural History) described by William Harper Pease. Bulletin of the British Museum (Natural History): Zoology Supplement 1: 1–96, 14 pls.

[L64] Leckenby, J. 1864. Abstract of the report of a three-weeks’ dredging-cruise off Scarborough. Report of the British Association for the Advancement of Science 33 (Notices and Abstracts): 105.

[L58] Linnaeus, C. 1758. Systema Naturae per Regna Tria Naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata. Laurentii Salvii: Holmiae.

[M54] Macpherson, J. H. 1954. Molluscs (sea shells and snails). In: Willis, J. M. (ed.) The Archipelago of the Recherche pp. 55–63. Australian Geographical Society: Melbourne.

Malaquias, M. A. E., & D. G. Reid. 2008. Systematic revision of the living species of Bullidae (Mollusca: Gastropoda: Cephalaspidea), with a molecular phylogenetic analysis. Zoological Journal of the Linnean Society 153 (3): 453–543.

[N79] Norman, A. M. 1879. The Mollusca of the fiords near Bergen, Norway. Journal of Conchology 2: 8–77.

[O27] Oldroyd, I. S. 1927. The Marine Shells of the West Coast of North America vol. 2 pt 1. Stanford University Press: Stanford University (California).

[PMB15] Petuch, E. J., R. F. Myers & D. P. Berschauer. 2015. The Living and Fossil Busycon Whelks: Iconic Mollusks of Eastern North America. San Diego Shell Club, Inc.

[TTE93] Tracey, S., J. A. Todd & D. H. Erwin. 1993. Mollusca: Gastropoda. In: Benton, M. J. (ed.) The Fossil Record 2 pp. 131–167. Chapman & Hall: London.

[U79] d’Urban, W. S. M. 1879. The Mollusca of Barents Sea, between Spitzbergen and Novaya Zemblia. Journal of Conchology 2: 88–94.

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