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Marine Invertebrates II

Marine Evertebraten II Forschung

The Marine Invertebrates II section curates and develops a substantial part of Senckenberg’s collections of recent marine invertebrates. The holdings comprise a wide diversity of “worm-like” marine invertebrates, including Annelida, Chaetognatha, Hemichordata, Nemertea, Platyhelminthes as well as Echinodermata. A particular focus of the collection lies on polychaetes.

The Marine Invertebrates II section houses extensive collections of marine invertebrates with a particular strength in annelids (polychaetes) and echinoderms, as well as significant holdings of platyhelminths and nemerteans. The collections include numerous type specimens and historically important material from a wide range of marine habitats and geographic regions.

The structure of the collection reflects the historical development of marine invertebrate research at Senckenberg and therefore includes material from several groups that were traditionally classified under broader assemblages such as “Aschelminthes.” Today the collections cover a broad diversity of marine invertebrate phyla and serve as an important resource for taxonomic, systematic, and biodiversity research.

Metadata for large parts of the collection are accessible through Senckenberg’s AQUiLA search portal, which allows users to explore collection data via text queries and filtered searches. As digitization is ongoing, not all holdings are currently available online and some records are restricted. Researchers requiring additional information are welcome to contact the section directly.

More about the Section

Research in the Marine Invertebrates II section focuses on the diversity, evolution, and morphology of marine invertebrates, with a particular emphasis on annelids (polychaetes). Our work contributes to the documentation and understanding of marine biodiversity, including the discovery and description of new species and the reconstruction of global phylogenies and systematic relationships using modern molecular and phylogenomic approaches.

A central research theme is the comparative morphology and evolution of annelids, with particular emphasis on the development and structure of annelid chaetae. We investigate the mechanisms of chaetogenesis and biomineralization and their evolutionary significance across annelid lineages. These questions are studied using an integrative toolkit that combines advanced bioimaging techniques, gene expression analyses, and genomic approaches with classical histology, electron microscopy, and ultrastructural methods.

Much of this research is closely linked to the museum collections, which provide essential reference material for taxonomic and evolutionary studies.

Students interested in Bachelor’s or Master’s projects, as well as prospective postdoctoral researchers, are encouraged to contact PD Dr. Ekin Tilic directly to discuss potential research opportunities.

Current Research Projects

EuroWorm

EuroWorm is a collaborative project that aims to accelerate research on marine annelid biodiversity by generating open genomic resources for European species. Because many annelid species originally described from European waters remain poorly characterized, the project combines museum collections, modern genomic methods, and international collaboration to improve the taxonomic and evolutionary framework of this ecologically important group.

The project is a collaboration between Senckenberg, Georg-August University Göttingen, and LIB – Leibniz Institute for the Analysis of Biodiversity Change (Hamburg).

Funding: Leibniz Association – Leibniz Collaborative Excellence Programme

Evolution of Photosensory Organs in Kinorhynchs

This project investigates the structure and evolution of photosensory organs in kinorhynchs, a group of microscopic marine invertebrates. By combining comparative morphology, advanced microscopy, and molecular approaches, the project aims to better understand the diversity and evolution of sensory systems in these poorly known meiofaunal animals.

Funding: Alexander von Humboldt Foundation
Contact: Dr. Maria Herranz

Phylogeny and Taxonomy of Nemertea

This project aims to reconstruct a comprehensive global phylogeny of ribbon worms (Nemertea) using a genome-skimming approach. By integrating genomic data with morphological and taxonomic research, the project seeks to clarify evolutionary relationships within the group and establish a robust framework for modern nemertean systematics, with a particular focus on poorly known deep-sea taxa.

Funding: German Research Foundation (DFG)
Contact: Dr. Christina Sagorny

15th International Polychaete Conference (IPC) 
27-31 July 2026

The Marine Invertebrates II section will host the next International Polychaete Conference (IPC) in Frankfurt. The conference is organized by PD Dr. Ekin Tilic, current President of the International Polychaetology Association (IPA).

The IPC is the major international meeting for researchers working on annelids and polychaetes, bringing together scientists from around the world to discuss recent advances in taxonomy, systematics, ecology, evolution, and genomics of segmented worms.

Further information on the conference, including registration, program details, and important dates, can be found on the website of the International Polychaetology Association below.

Annelid Research Library

The Marine Invertebrates II section maintains one of the most comprehensive specialized libraries on annelids and polychaetes worldwide. The collection includes books, monographs, and reprints covering taxonomy, systematics, evolution, ecology, and biology of annelids.

The library incorporates the former research libraries of Gesa Hartmann-Schröder (Hamburg) and Volker Storch (Heidelberg) and represents an important resource for annelid researchers working with the Senckenberg collections.

WORPS – World Register of Polychaete Species

The World Register of Polychaete Species (WORPS) is a historical card catalogue documenting the scientific names and taxonomic literature of polychaete annelids. The register was initiated in 1952 by Gesa Hartmann-Schröder and later maintained and expanded by Dieter Fiege and Ruth Barnich.

WORPS contains detailed information on taxonomic names, synonymies, literature references, and distribution data compiled from the scientific literature. The register complements modern databases such as the World Register of Marine Species (WoRMS) and remains a valuable resource for polychaete taxonomy.

Researchers interested in consulting WORPS are kindly asked to contact Dr. Dieter Fiege.

Team

PD Dr. Ekin Tilic 
Head of Section - Marine Invertebrates II
Marie-Louise Tritz 
Technical Assistant
Dr. Christina Sagorny 
PostDoc - DFG Walter Benjamin Fellow
Dr. María Herranz Matesanz 
Visiting Scientist - Humboldt Fellow
Dr. Dieter Fiege 
Curator emeritus
Sammlung Polycheaten Dr. Dieter Fiege
Dr. Ruth Barnich 
Volunteer
Marine Evertebraten II Mitarbeiter RB_homeneu
Heiko Honrath 
Volunteer
Dr. Angela Schmidt 
Volunteer

Students

Louka Wijnmaalen 
MSc Student - University of Groeningen
Thesis Topic: "An Integrative Taxonomic Study of Epibiotic Serpulid Worms Associated with the Chiton Ferreiraella sp."
Alice Sommerlat 
BSc Student - Goethe University Frankfurt
Thesis Topic: "Histology-Free & Integrative Description of Deep-Sea Nemertea from Alaskan Methane Seeps"

Annelida is a comprehensive reference work on the diversity, morphology, and systematics of segmented worms. The volume provides an updated overview of annelid taxonomy and phylogeny. In addition to chapters on anatomy, terminology, and methods for collecting and preserving annelids, the book presents 77 taxonomic chapters informed by both morphological research and recent molecular phylogenomic studies. The volume is richly illustrated with high-resolution photographs and scanning electron micrographs, highlighting the remarkable diversity of annelids across marine, freshwater, and terrestrial habitats.

Publications

Sagorny, C., von Döhren, J., Rouse, G. W., & Tilic, E. (2026). Genomic evidence reveals a record-breaking range in Tubulanus lutescens (Nemertea) from shallow coasts to deep-sea seeps. Biology Letters22(4). https://doi.org/10.1098/rsbl.2025.0744

Marine Zoology

Senckenberg Research Institute and Natural History Museum

Institutes

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