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 geological 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 present-day faunas.

Add short description
Add short description


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., 2023. De novemberstorm bracht fraaie hartschelpen naar de Hollandse kust. – Nature Today, 17.xii.2023. https://www.naturetoday.com/intl/nl/nature-reports/message/?msg=31675
  • Raven, J.G.M. & Alonso, A., 2023. New data on holoplanktic molluscs from NW Spain, - Basteria, 87(2): 138-149.
  • Raven, J.G.M. & Van Leeuwen, S., 2023. Philinissima denticulata, new for The Netherlands. - Basteria 87(2): 113-115.
  • Raven, J.G.M. & Van Leeuwen, S., 2023. Mollusken van scheepswrakken in de Noordzee. Drie duikexpedities in 2021. Spirula 436: 38-46.(Molluscs from ship wrecks in the North Sea – Three campaigns in 2021).
  • Raven, J.G.M., 2023. Filling large gaps in distribution areas: the Philinidae of NW Spain. Basteria, 87(1): 97-106
  • Raven, J.G.M., 2022. Expansion of Crepidula fornicata (Linnaeus, 1758) (Gastropoda: Calyptraeidae) in the North Sea drives the species into new niches. The Nautilus 136(3-4): 56-62.
  • Raven, J.G.M. & Dekker, H., 2022. A review of Hecuba Schumacher, `1817 (Bivalvia: Donacidae), with description of a new species and validation of Hecuba pubescens (Linnaeus, 1758). Basteria 86(2): 96-113.
  • Raven, J.G.M., Alonso Suárez, A., Torres, J.S. & Sánchez, O., 2022. The family Epitoniidae Berry, 1910 in Asturias and Cantabria (NW Spain) 2. More species from the Cantabrian Sea and further aquarium observations. Elona, 3: 105-110.
  • Raven, J.G.M., Alonso Suárez, A. & Sánchez, O., 2022. First records of several marine molluscs from Asturias and Cantabria (NW Spain). Part 2. Elona, 3: 91-104.
  • Van der Voort, J., Jagt, J.W.M., Peijnenburg, K.T.C.A., Pouwer, R., Raven, J.G.M. & Wesselingh, F.P., 2021. In memoriam: Adrianus Willem (Arie W.) Janssen (1937–2021). Cainozoic Research, 21(2): 113-146.
  • Raven, J.G.M., 2021. The Donacidae (Bivalvia, Tellinoidea) from the South China Sea and East Asia, with the rediscovery of some forgotten taxa and the description of two new species. Vita Malacologica, 20: 61-102.
  • Raven, J.G.M., 2021. Notes on molluscs from NW Borneo. 9. Harpidae, with the description of Asiaharpa sarawakiana gen. nov. spec. nov. Vita Malacologica, 20: 51-60.
  • Raven, J.G.M., 2021. Notes on molluscs from NW Borneo. 8. Stromboidea (Gastropoda, Neogastropoda). Addendum, including the description of two new genera and seven new extinct species. Vita Malacologica, 20: 23-50.
  • Raven, J.G.M., 2021. Notes on molluscs from NW Borneo 7. Babyloniidae (Gastropoda, Neogastropoda). Vita Malacologica, 20: 14-22.
  • Raven, J.G.M., 2021. After more than 100 years being considered a mollusc, Acmaea semicornea Preston, 1908 (Acmaeidae) turns out to be a brachiopod. Vita Malacologica, 20: 11-13.
  • Raven, J.G.M., 2021. Notes on molluscs from Borneo. 6. Bufonaria borneensis spec. nov. (Gastropoda, Caenogastropoda, Bursidae). Vita Malacologica, 20: 3-10.
  • Loevezijn, G.B.S. van & J.G.M. Raven, 2021. The Upper Devonian of the river Sil area: a stratigraphic correlation between León and Asturias, northern Spain - Boletín del Instituto Geológico y Minero de España 132 (5): 325-354.
  • 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. & Alonso Suárez, A. 2020. 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.
  • 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]
  • Loevezijn, G.B.S. van & Raven, J.G.M., 2020. Controlling processes of Frasnian mixed siliciclastic-carbonate depositional systems in the Cantabrian Mountains, NW Spain. – Geologos 26: 1-23.
  • Raven, J.G.M., 2019. Crepidula fornicata (Linnaeus, 1758) as hermit crab commensal in the North Sea. The Nautilus, 133(2): 1-8.
  • 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.
  • 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.
  • 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"