Magelonidae Cunningham & Ramage 1888
Creators: name: Mortimer, Kate
name: Mills, Kimberley
name: Jordana, Esther
name: Pinedo, Susana
name: Gil, João
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Spionida
Magelonidae

description: Key to adult Magelonidae species in European waters
(adapted from Mortimer et al. 2011 and Fiege et al. 2000)
1. Specimens with eight thoracic chaetigers........................................ Octomagelona bizkaiensis (Fig. 12)
- Specimens with nine thoracic chaetigers............................................................2 (Fig. 11)
2. Chaetiger 9 carrying specialised chaetae with mucronate tips................................................... 3
- Chaetiger 9 without specialised chaetae.................................................................... 4
3. Lateral pouches present between chaetigers 10 and 11. Notopodial postchaetal lamellae of chaetigers 1–8 with crenulate upper margins; superior dorsal lobes present on chaetigers (3) 4–8.................................... Magelona johnstoni
- Lateral pouches not occurring until extreme posterior region. Thoracic notopodial postchaetal lamellae with smooth upper margins; no superior dorsal lobes on thoracic chaetigers........................................ Magelona mirabilis
4. Abdominal hooks bidentate, small, slender species........................................................... 5
- Abdominal hooks tridentate............................................................................. 6
5. Prostomium without prostomial horns, superior dorsal lobes absent................................. Magelona minuta
- Prostomial horns, superior dorsal lobes present on thoracic chaetigers........... Magelona sp. Mud Volcano, Gulf of Cádiz
6. Prostomium with clearly distinct frontal horns.............................................................. 7
- Prostomium without frontal horns, or with a squared anterior margin (“rudimentary horns”).......................... 8
7. Prostomium wider than long, anterior margin crenulate. Thoracic superior dorsal lobes foliaceous........ Magelona wilsoni
- Prostomium longer than wide, anterior margin smooth. Thoracic superior dorsal lobes slender......... Magelona lusitanica
8. Slender species; prostomium longer than wide, superior dorsal lobes present on chaetigers 1–8. Thoracic transverse bands just behind parapodia present................................................................ Magelona filiformis
- Stout species; prostomium width equal to/or slight larger than length. No thoracic superior dorsal lobes. Thoracic pigment band between chaetigers 5–9 (N.B. fades in preserved specimens). Sediment covered paper-like tube may be present........... 9
9. Abdominal notopodial lateral lamellae much larger than neuropodial. Neuropodial lamellae of posterior thorax ventral beneath chaetal bundle............................................................................ Magelona alleni
- Abdominal lateral lamellae of roughly equal size in both rami. Neuropodial lamellae of posterior thorax in a distinctly postchaetal position..................................................................... Magelona equilamellae
description: Published as part of Mortimer, Kate, Mills, Kimberley, Jordana, Esther, Pinedo, Susana & Gil, João, 2020, A further review of European Magelonidae (Annelida), including redescriptions of Magelona equilamellae and Magelona filiformis, pp. 89-114 in Zootaxa 4767 (1) on page 111, DOI: 10.11646/zootaxa.4767.1.4, http://zenodo.org/record/3770151