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  • Placida cremoniana (Trinchese, 1892).

    Placida cremoniana (Trinchese, 1892).
  • Patella vulgata; tall and low profile shells from the north tip of the Great Orme, Wales, which is exposed to strong wave action.

    Patella vulgata; tall and low profile shells from the north tip of the Great Orme, Wales, which is exposed to strong wave action.
  • Patella vulgata; tall and low profile shells from the Menai Strait, Wales, which has virtually no exposure to waves or spray.

    Patella vulgata; tall and low profile shells from the Menai Strait, Wales, which has virtually no exposure to waves or spray.
  • Patella vulgata; shell from a rocky islet in North Wales.

    Patella vulgata; shell from a rocky islet in North Wales.
  • Onoba aculeus album. Comparison with O. semicostata. Menai Strait, Wales. June 2013

    Onoba aculeus album. Comparison with O. semicostata.  Menai Strait, Wales. June 2013
  • Onchidoris muricata 2.1mm long.

    Onchidoris muricata 2.1mm long.
  • Littorina obtusata. Menai Strait. February 2011.

    Littorina obtusata. Menai Strait. February 2011.
  • Littorina obtusata sensu stricto (top pair) & Littorina fabalis (below). Menai Strait. February 2011.

    Littorina obtusata sensu stricto (top pair) & Littorina fabalis (below). Menai Strait. February 2011.
  • Ideal poses for identification of gastropod shells, both marine and non-marine.

    Ideal poses for identification of gastropod shells, both marine and non-marine.
  • Facelina bostoniensis 6.5mm long.

    Facelina bostoniensis 6.5mm long.
  • Eubranchus vittatus 9mm long.

    Eubranchus vittatus 9mm long.
  • Eubranchus vittatus 17mm long.

    Eubranchus vittatus 17mm long.
  • Eubranchus exiguus 3mm & 1.6mm long.

    Eubranchus exiguus 3mm & 1.6mm long.
  • Doto sp. 1. Length 9.5mm.

    Doto sp. 1. Length 9.5mm.
  • Doto sp. 1. Length 7.5mm.

    Doto sp. 1. Length 7.5mm.
  • Doto sp. 1 pseudobranchs.

    Doto sp. 1  pseudobranchs.
  • Doto koeneckeri 9.6mm long.

    Doto koeneckeri 9.6mm long.
  • Doto hydrallmaniae length 7.5mm & Doto sp. 1, length 9.5mm. Comparison images at same scale.

    Doto hydrallmaniae length 7.5mm & Doto sp. 1, length 9.5mm. Comparison images at same scale.
  • Doto hydrallmaniae 9mm long.

    Doto hydrallmaniae 9mm long.
  • Doto hydrallmaniae 7.5mm long.

    Doto hydrallmaniae 7.5mm long.
  • Dendronotus sp. 15.5mm long.

    Dendronotus sp. 15.5mm long.
  • Dendronotus sp. 15.5mm & 2.3mm long.

    Dendronotus sp. 15.5mm & 2.3mm long.
  • Cuthonella concinna 5mm long.

    Cuthonella concinna 5mm long.
  • Cornu aspersum juvenile. Diameter 4mm. Stockport, England. May 2018.

    Cornu aspersum juvenile. Diameter 4mm. Stockport, England. May 2018.
  • Cornu aspersum juvenile. Diameter 12mm. Stockport, England. May 2018.

    Cornu aspersum juvenile. Diameter 12mm. Stockport, England. May 2018.
  • Cernuella virgata, sole and underside of head. Shell breadth 6mm. Mown grass on degraded dunes. Wirral coast, Cheshire. September 2016

    Cernuella virgata, sole and underside of head. Shell breadth 6mm.  Mown grass on degraded dunes. Wirral coast, Cheshire. September 2016
  • Ancula gibbosa 12.8mm long.

    Ancula gibbosa 12.8mm long.
  • A13 Appendix, Testudinalia testudinalis

    A13 Appendix, Testudinalia testudinalis
  • A12 Appendix to T. testudinalis account. Specimen from north-west Iceland 65.88° N (2019) © S. Case.

    A12 Appendix to T. testudinalis account. Specimen from north-west Iceland 65.88° N (2019) © S. Case.
  • A11 Appendix to T. testudinalis account. Historic and recent, southern limits of distribution.

    A11 Appendix to T. testudinalis account. Historic and recent, southern limits of distribution.
  • A10 Appendix to T. testudinalis account. Historic and recent specimens from North America.

    A10 Appendix to T. testudinalis account. Historic and recent specimens from North America.
  • A09 Appendix T. testudinalis. Specimens from Denmark and Germany.

    A09 Appendix  T. testudinalis. Specimens from Denmark and Germany.
  • A08 Appendix to T. testudinalis. T. testudinalis from the Öresund, south-west Sweden.

    A08 Appendix to T. testudinalis. T. testudinalis from the Öresund, south-west Sweden.
  • A07 Appendix T. testudinalis. Historic and recent specimens from north-east Irish Sea.

    A07 Appendix T. testudinalis. Historic and recent specimens from north-east Irish Sea.
  • A06 Appendix T. testudinalis. Recent, live, specimens from Ireland (eulittoral) and the Isle of Man (sublittoral).

    A06 Appendix T. testudinalis. Recent, live, specimens from Ireland (eulittoral) and the Isle of Man (sublittoral).
  • A05 Appendix T. testudinalis account. Recent, eulittoral, 10 mm & 12 mm long, live specimens from Edinburgh, Scotland 56.00° N (2020). © D. Notton.

    A05 Appendix T. testudinalis account. Recent, eulittoral, 10 mm & 12 mm long, live specimens from Edinburgh, Scotland 56.00° N (2020). © D. Notton.
  • A04 Appendix T. testudinalis. Historic specimen from Yorkshire and historic temperatures

    A04 Appendix T. testudinalis. Historic specimen from Yorkshire and historic temperatures
  • A03 Appendix T. testudinalis. N.E. England 19th century expansion southwards of T. testudinalis.

    A03 Appendix T. testudinalis. N.E. England 19th century expansion southwards of T. testudinalis.
  • A02 Appendix T. testudinalis COMPARISON juvenile Tectura virginea. 1-3 Dublin, Ireland (2020). 4-5 North Devon, south-west England (2019). Leg. A. Wright.

    A02 Appendix T. testudinalis COMPARISON juvenile Tectura virginea. 1-3 Dublin, Ireland (2020). 4-5 North Devon, south-west England (2019). Leg. A. Wright.
  • A01 Appendix to T. testudinalis COMPARISON Tectura virginea.

    A01 Appendix to T. testudinalis  COMPARISON Tectura virginea.
  • 96 Patella pellucida album. COMPARISON image of Tectura virginea

    96 Patella pellucida album. COMPARISON image of Tectura virginea
  • 95 Patella pellucida. Growth Stage 5 holdfast dweller (GS5h) displaced by storm waves. October 2017. North-west Anglesey, Wales. © A. Rowat.

    95 Patella pellucida. Growth Stage 5 holdfast dweller (GS5h) displaced by storm waves. October 2017. North-west Anglesey, Wales. © A. Rowat.
  • 94 Patella pellucida. Shell length 9.2mm. Growth Stage 4 holdfast dweller (GS4h). March 2017. West Anglesey, Wales.

    94 Patella pellucida. Shell length 9.2mm. Growth Stage 4 holdfast dweller (GS4h). March 2017. West Anglesey, Wales.
  • 93 Patella pellucida. Iridescent Chondrus crispus.

    93 Patella pellucida. Iridescent Chondrus crispus.
  • 92 Patella pellucida. Length 10.1mm. Growth Stage 5 holdfast dweller (GS5h). March 2017. West Anglesey, Wales.

    92 Patella pellucida. Length 10.1mm.  Growth Stage 5 holdfast dweller (GS5h).  March 2017. West Anglesey, Wales.
  • 91 Patella pellucida. Juvenile, Growth Stage 3. March 2017. West Anglesey, Wales. April 2016. North Yorkshire, England.

    91 Patella pellucida. Juvenile, Growth Stage 3. March 2017. West Anglesey, Wales. April 2016. North Yorkshire, England.
  • 90 Patella pellucida. Juvenile, Growth Stage 3. April 2012. Jersey, the Channel Islands. © P. Lightfoot.

    90 Patella pellucida. Juvenile, Growth Stage 3. April 2012. Jersey, the Channel Islands. © P. Lightfoot.
  • 9 Gastropod anatomy. Male Littorina fabalis, restrained by clothes peg (hidden by editing).

    9 Gastropod anatomy. Male Littorina fabalis, restrained by clothes peg (hidden by editing).
  • 9 Cepaea hortensis. Pennine foothills, V.C. Derbyshire, England. August 2018.

    9 Cepaea hortensis. Pennine foothills, V.C. Derbyshire, England. August 2018.
  • 8tella pellucida. Shell length 9.2mm. Growth Stage 4 holdfast dweller (GS4h). March 2017. West Anglesey, Wales.

    8tella pellucida. Shell length 9.2mm. Growth Stage 4 holdfast dweller (GS4h). March 2017. West Anglesey, Wales.
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Marinvert

Photographic guide to the identification and biology of European marine invertebrates

Marinvert
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