Han Raven

Han Raven

My key interest is understanding faunal communities living in different depositional environments and how these change through geological time


Cainozoic to recent molluscs, relationship molluscs and depositional environments, mollusc taxonomy.

Dr. Han Raven

Research associate
Marine Biodiversity

+31 (0)6 8163 9482


I have always been deeply interested in natural history, especially molluscs. The field work during my geology study took me to different parts of Spain where I collected terrestrial snails and discovered the impact of geology and climate on their distribution.

My geogical studies and thesis focused on the stratigraphy and depositional history of the Devonian and early Carboniferous of  the Cantabrian mountains (NW Spain), in which I used conodonts as indicator for age.

I became an active member of the Nederlandse Malacologische Vereniging and the Werkgroep voor Tertiaire en Kwartaire Geologie studying NW European faunas: from the tropical faunas in the Eocene of the Paris Basin to the temporary outcrops with Holocene faunas and recent ones.

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Working for Sarawak Shell Berhad I lived six years in Sarawak (Malaysia) during which I sampled and studied local Miocene to present-day faunas and had an opportunity to travel extensively through the region. The depositional environments in the region and their faunas have undergone many changes. Especially the large changes during the Holocene sealevel rise are remarkable. There is sufficient material for many years of further study. I am keen to cooperate with specialists on specific mollusc groups.


You can download most of my publications from my personal page on ResearchGate

  • Raven, J.G.M., 2020. First records of Lamellaria latens (Linnaeus, 1758) and Velutina plicatilis (O.F. Müller, 1776) (Caenogastropoda, Velutinidae) from the southern North Sea. Basteria 84(4-6): 210-214.

  • Landau, B.M., Raven, J.G.M., Breitenberger, A. & Dekkers, A.M., 2020. Semiricinula preturbinoides spec. nov., a new species from the Miocene of Java (Gastropoda: Muricidae). – Basteria 84(4-6): 131-134.

  • Raven, J.G.M., 2020. Mollusken uit opgedoken visnetten. Twee rondes Duik de Noordzee Schoon in 2019.Spirula, 425: 27-43.

  • Kocsis, L., Botfalvai, G., Qamarina, Q., Razak, H., Király, E., Lugli, F., Wings,O., Lambertz, M., Raven, J.G.M., Briguglio, A. & Rabi, M., 2020. Geochemical analyses suggest stratigraphic origin and late Miocene age of reworked vertebrate remains from Penanjong Beach in Brunei Darussalam (Borneo). – Historical biology DOI: 10.1080/08912963.2020.1819999: 1-12.

  • Raven, J.G.M., 2020. Mollusken van zandopspuitingen op het Noorderstrand (Scheveningen, Zuid-Holland). Spirula, 423: 12-28.

  • Raven, J.G.M. (Han). 2020. In memoriam: John van Aartsen (1936‐2020), el maestro en micromoluscos. Elona 2: 129.

  • Raven, J.G.M. (Han) & Alonso Suárez, A. ‐ The family Epitoniidae Berry, 1910 in Asturias and Cantabria (NW Spain), with field and aquarium observations. Elona 2: 118-127.

  • Alonso Suárez, A. & Raven, J.G.M., 2020. Primeras citas de varios moluscos marinos para la costa de Asturias (NO de España). I. Elona, 2: 102-113.

  • Alonso Suárez, A. & Raven, J.G.M., 2020. First records of naturalised Ruditapes philippinarum (Adams & Reeve, 1850)(Mollusca, Bivalvia, Veneridae) in Asturias (NW Spain), keys for identification, and evidence of hybridisation with native Ruditapes decussatus (Linnaeus,1758). Elona 2: 67-83.

  • Alonso Suárez, A. & Raven, J.G.M., 2020. Presencia de Cernuella virgata (Da Costa, 1778) en la cornisa cantábrica (noroeste de España) y su posible carácter de especie introducida. Elona 2: 49-56.

  • Raven, J.G.M., 2020. The first record of Hygromia cinctella (Draparnaud, 1801) (Gastropoda, Hygromiidae) from the Basque region, Spain. Elona, 2: 14-16.

  • Loevezijn, G.B.S. van & J.G.M. Raven, 2020. Controlling processes of Frasnian mixed siliciclastic-carbonate depositional systems in the Cantabrian Mountains, NW Spain. – Geologos 26: 1-23.

  • Raven, J.G.M. & S. van Leeuwen, 2020. Molluscs from fishing nets retrieved from the North Sea, June 2018. Mollusc World, 52: 19-26.  [translation of Raven & Van Leeuwen, 2019]

  • Alonso Suárez, A., Raven, J.G.M. & Quiñonero-Salgado, S., 2019. The Iberian Pyrenaearia cantabrica (Hidalgo, 1873) clade: elucidation of the type localities of its taxa (Gastropoda, Pulmonata, Hygromiidae). Basteria 83 (4-6): 169-180.

  • Raven, J.G.M., 2019. Notes on molluscs from NW Borneo 5. Dispersal of molluscs through nipa rafts. – The Festivus, 51(1): 3-10.
  • Raven, J.G.M., 2019. Crepidula fornicata (Linnaeus, 1758) as hermit crab commensal in the North Sea. The Nautilus, 133(2): 1-8.
  • Raven. J.G.M., 2019. Het Klein drijfhorentje Rissoa parva (da Costa, 1778) van het Banjaardstrand. Afzettingen,40(2): 50-53.
  • Alonso Suárez A., Ruiz Cobo, J., Raven J.G.M. & Quiñonero-Salgado S., 2019. En tierra de nadie: Nuevos datos de las familias Truncatellidae Gray, 1840 y Ellobiidae L. Pfeiffer, 1854 (Gastropoda) en el NO de España. Elona, 1: 48-54.
  • Ruiz Cobo, J., Raven J.G.M., Quiñonero-Salgado S. & Alonso Suárez A., 2019. Nuevas citas de moluscos continentales para Cantabria (NO de España). – Elona, 1: 32-36.
  • Alonso Suárez A., Raven J.G.M. & Quiñonero-Salgado S., 2019. evaluación del estado de conservación de Deganta azarum (Boeters & Rolán 1988) (Caenogastropoda: Hydrobiidae) en Asturias (NO de España). – Elona: 21-28.
  • Alonso Suárez A. & Raven J.G.M., 2019. New records of Xerotricha corderoi (Gittenberger & Manga, 1977) and Plentuisa vendia Puente & Prieto, 1992 (Gastropoda: Helicoidea) in the Cantabrian Mountains (NW Spain). Elona, 1: 14-15.
  • Alonso Suárez, A. & J.G.M. Raven, 2019. An unexpected record of Pyrenaearia cantabrica (Hidalgo, 1873) (Gastropoda: Pulmonata: Geomitridae) in El Bierzo (León, NW Spain). Elona, 1: 7-9.
  • Raven, J.G.M. & S. van Leeuwen, 2019. Mollusken uit opgedoken visnetten. Duik de Noordzee Schoon juni 2018 (Molluscs from fishing nets retrieved from the North Sea, June 2018). Spirula, 418: 44-54.

All publications


April 2019: Nederlandse Malacologische Vereniging (Scheveningen): "Mariene mollusken van NW Borneo"

March 2018: Universiti Brunei Darussalam (Brunei): "Miocene to Holocene fossils from Sarawak and Brunei"

January 2018: Werkgroep voor Tertiaire en Kwartaire Geologie (Tilburg): "Fossielen van Sarawak en Brunei"

September 2015: Naderlandse Geologische Vereniging Themadag Riffen (Utrecht): "Koraalriffen bij Borneo, het effect van zeespiegelbewegingen"