Ophioplinthus gelida (Koehler, 1901): host Ophionotus victoriae Bell, 1902: host Nematoda (unidentified): coelomic cavity and bursae endoparasites Nematodes identified as parasites of Antarctic ofiuroids belong to Thalassonema genus; they have been found in Ophiocten amitinum, although mentioned in sub-Antarctic waters, … Continue reading
This gallery contains 2 photos.
(a) Specimen without Iophon with normal growth of plates. (b) Specimen with anomalous growth of plates from which Iophon has been removed sp. Collected by Pablo J. González-López. Cruiser ANTARKTIS XXIII/8 Polarstern Identified by Rafael Martín-Ledo
This morning, after a delicious breakfast at Vicente’s, I was in my laboratory ready to observe specimens, when I suddenly found a beautiful composition: a pycnogonid (Austrodecus sp) grasping the spicules of the Iophon sponge which covers the disk of a … Continue reading
on Ophioplinthus gelida, what Foraminifera is this ? Different states of the same species? Cruiser ANTARKTIS XXIII/8 Polarstern Photo by Rafael Martín-Ledo Identified by Rafael Martín-Ledo
First the ectoparasites copepods of Antarctic ofiuroids were cited by Mortensen (1936), but without identifying the species, it was Heegaard (1951) who identified them. In the taxonomic literature they have also been cited by Madsen (1967). Ophiacantha antarctica: Host Cancerilla sp: ectoparasite The copepods … Continue reading
Symbiosis with sponges you can see in …
Ophioplinthus relegata : mutualist symbiont Hydractinia sp : mutualist symbiont One of the most beautiful symbiosis observed in the brittle stars is that of an ophiuroid covered with “flowers” (although they are carnivorous). The colonial hydrozoan Hydractinia vallini Jaederh places … Continue reading
Ophiuroidea: Ophioplinthus gelida: host Protozoa: Folliculina sp: epibiont On the surface of some samples of Ophioplinthus gelida may appear numerous specimens of ciliate Folliculina sp. Their presence on the ophiuroid is mostly in the radial shields, but they may also appear on any … Continue reading
Ophiuroidea: Ophioplinthus gelida: host Entoprocta: Loxosomella sp : commensal 1. Extended lophophorate 2. Bud 3. Contracted lophophorate Loxosomella sp. as commensal of Ophioplinthus gelida (Koehler 1900), from which it obtains a substrate that provides its mobility to the food sources, the advantage … Continue reading
