Ctenophoricola, Martín & Álvarez-Campos & Kondo & Núñez & Fernández-Álamo & Pleijel & Goetz & Nygren & Osborn, 2021

Martín, Guillermo San, Álvarez-Campos, Patricia, Kondo, Yusuke, Núñez, Jorge, Fernández-Álamo, María Ana, Pleijel, Fredrik, Goetz, Freya E., Nygren, Arne & Osborn, Karen, 2021, New symbiotic association in marine annelids: ectoparasites of comb jellies, Zoological Journal of the Linnean Society 191 : -

CTENOPHORICOLA GEN. NOV.

lsid: zoobank.org:act: 60F0CA86-D905-469D-8B6B- 65326EA195F9

Diagnosis: Alciopini with body divided in two distinctly different regions, densely covered by cilia. Anterior region highly contractile, with small, acute parapodia, with indistinct dorsal and ventral lobes,

Lumbrineris latreilli 0.99 Aglaophamus sp. - Ancistrosyllis groenlandica 1 Paralacydonia paradoxa 0.99 Oxydromus pugettensis - 0.99 Nereis pelagica - Lepidonotus sublevis 1 Sigalion spinosus 0.99 Glycera dibranchiata - Lacydonia eliasoni 0.1 1 Lopadorrhynchus sp. 1 100 Pelagobia longicirrata 1 Travisiopsis coniceps * 100 Typhloscolex sp. - Phyllodoce rosea * 95 1 1 Phyllodoce Phyllodoce laminosa longipes Phyllodocidae 91 Phyllodoce lineata 0.91/ - 1 Phyllodoce mucosa 100 Phyllodoce groenlandica Phyllodoce citrina 1 0.96/- Phyllodoce maculata 100 1 Paranaitis katoi 1 Paranaitis speciosa 1 Paranaitis kosteriensis 1 Eteone picta 1 Eteone foliosa Eteone pacifica 1 Notophyllum foliosum Notophyllum japonicum Chaetoparia nilssoni 0.98/- Mystides caeca 0.99/ 1 1 Nereiphylla lutea 1 Nereiphylla rubiginosa Nereiphylla castanea Pterocirrus nidarosiensis 0.97/- 1 Pterocirrus macroceros 100 Pterocirrus montereyensis Hesionura elongata * 1 Pseudomystides limbata 0.98/- 0.98 100 Pseudomystides spinachia * Eulalia mustela 0.99/ Protomystides exigua 0.96 82 Eulalia bilineata Eulalia expusilla * 0.97/80 Eulalia tjalfiensis 1 Eulalia hanssoni 100 Eulalia aurea 1/95 Eulalia viridis Sige fusigera 0.99/ * 1 Sige oliveri 1 75 1 Eumida longicornuta 95 1 Eumida bahusiensis 0.95/- 91 1 Eumida kelaino 1 100 Eumida sanguinea - Eumida ockelmanni 1 0.97 Eumida arctica 89 80 Phalacrophorus pictus Alciopini Ctenophoricola masanorii 0.99/80 1 Alciopina sp. 1 100 1 Alciopina sp. 2 1/86 1 82 Rhynchonereella gracilis 92 Vanadis formosa 1 83 - Torrea sp. 1 89 Torrea sp. 2 1 Vanadis antarctica 100 Vanadis longissima

without chaetae but with acicula. Posterior region with distinctly larger segments; parapodia with distinctly developed and elongated dorsal and ventral lobes and capillary chaetae. Parapodia all uniramous, with thin, single acicula. Prostomium small, with two tiny retractile palps, without antennae. Pharynx eversible, unarmed, without papillae. Two distinctly pigmented, elongate, lensed eyes, extending through several anterior segments.

Remarks: Reproduction unknown. Due to its peculiar morphology, we hypothesize that some of the specimens with different sizes could either be regenerating forms after fragmentation (i.e. asexual reproduction) or predation, or juveniles descending directly from the most developed specimens.

Type-species: Ctenophoricola masanorii by present designation.

Etymology: The name refers to the habitat of the new genus, combining Ctenophora, the scientific name for comb jellies (from Ancient Greek κτείς, a comb, and φέρω, to carry) with the Latin root - cola meaning “living on” (from incola, dweller). The gender of the name is masculine.