About Annelida

The phylum Annelida, comprising the segmented worms, represents a remarkably diverse and evolutionary ancient clade within the superphylum Lophotrochozoa. Characterized by their defining metamerism, these organisms exhibit extraordinary morphological and ecological plasticity. From the earthworms that engineer terrestrial soils and a profound diversity of marine polychaetes, annelids occupy critical functional roles across global ecosystems. Perhaps most striking are their extreme evolutionary adaptations, perfectly exemplified by deep-sea tubeworms like Riftia pachyptila, which thrive in hostile hydrothermal vent environments through obligate chemosynthetic symbioses. Such profound ecological versatility and deep evolutionary history make annelids unparalleled models for comparative genomics. They offer crucial insights into the genetic basis of morphological innovation, developmental biology, tissue regeneration, and complex host-microbe interactions. Despite their immense biological importance, genomic resources for this phylum have historically remained fragmented and difficult to navigate.

AnnelidaDB bridges this critical gap by providing a comprehensive, centralized platform dedicated exclusively to annelid multi-omics data (high-quality genomic, mitochondrial, transcriptomic, single-cell, and syntenic resources), empowering the global research community to seamlessly explore and unravel the molecular mysteries of these extraordinary invertebrates.

Data Statistics

Species 1,121
Species with nuclear genome 151
Protein Sequences 6,624,127
Species with mitogenome 177
Symbiont genome 30
Chromosome-level assemblies 111
Species with gene models 149
Species with single-cell data 5
Single-cell Datasets 9
Cell Clusters 171
Cell Number 209,802
Species with RNA data 591
Species with DNA data 718
Species with epigenome data 13
Species with proteome data 27
Oxford Plots 12,311

Phylogenetic Overview

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Species rapid view

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Acholoe squamosa
Ailoscolex lacteospumosus
Alentia gelatinosa
Alitta virens
Allolobophora icterica
Alvinella pompejana
Amphiduros pacificus
Amynthas aspergillum
Amynthas corticis
Amynthas gracilis
Aporrectodea caliginosa
Arctonoe vittata
Arenicola marina
Armandia brevis
Axiothella rubrocincta
Bimastos eiseni
Bimastos rubidus
Bispira polyomma
Branchellion lobata
Branchiomma bombyx
Capitella teleta
Carpetania matritensis
Chaetopterus dewysee
Cirriformia tentaculata
Dendrobaena attemsi
Eisenia andrei
Eisenia fetida
Enchytraeus crypticus
Erpobdella octoculata
Escarpia spicata
Eudrilus eugeniae
Eulalia xanthomucosa
Eupolymnia gili
Euthalenessa oculata
Flabesymbios commensalis
Gastrolepidia clavigera
Gesiella jameensis
Glycera fallax
Glycera tridactyla
Halosydna brevisetosa
Haplosyllis anthogorgicola
Haplosyllis leylae
Harmothoe areolata
Harmothoe impar
Helobdella europaea
Helobdella robusta
Hermodice carunculata
Hirudinaria manillensis
Hirudo medicinalis
Hirudo nipponia
Hirudo tianjinensis
Hirudo verbana
Hydroides elegans
Laetmonice hystrix
Lamellibrachia barhami
Lamellibrachia columna
Lamellibrachia luymesi
Lamellibrachia satsuma
Leodice harassii
Lepidonotus clava
Lumbriculus variegatus
Lumbricus rubellus
Lumbricus terrestris
Maea johnstoni
Melinna palmata
Nereis procera
Oasisia alvinae
Oconnorella tubifera
Osedax frankpressi
Owenia fusiformis
Paraescarpia echinospica
Paralvinella hessleri
Paralvinella palmiformis
Paucibranchia bellii
Phascolosoma agassizii
Phyllodoce laminosa
Phyllodoce medipapillata
Piscicola geometra
Placobdella costata
Platynereis dumerilii
Platynereis massiliensis
Ridgeia piscesae
Riftia pachyptila
Sabella spallanzanii
Sabellastarte magnifica
Sclerolinum annulatum
Sclerolinum contortum
Serpula vermicularis
Siboglinum fiordicum
Sigalion mathildae
Sinospelaeobdella cavatuses
Sipunculus nudus
Sthenelais limicola
Streblospio benedicti
Terebella lapidaria
Themiste lageniformis
Urechis unicinctus
Whitmania acranulata
Whitmania laevis
Whitmania pigra

News and updates

2026-06-01: AnnelidaDB has updated the global distribution and images of species from GBIF.

2026-05-26: AnnelidaDB got the domain name (annelidadb.com)!

2026-05-25: AnnelidaDB has updated 131 genomic resources.

2026-04-01: AnnelidaDB initiated the website.

2025-11-03: AnnelidaDB started.

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