I found it on the stomach of a Myliobatis peruvianus , I guess it's a Pectinariidae (Pectinaria sp.) The photos are continuous of a single specimen.
Thanks
It does appear to be a polychaete, but I don't believe it is a Pectinariidae. The brassy chaete in your images do not resemble the scaphal spines of Pectinariidae (not broad enough) or the notochaete along the body. Can you find any other chaeta besides the ones imaged? Identication of polychaetes from gut contents is best done with chaetal types. Additional higher magnification chaetal images might help.
The bundles of capillary chaetae and the gut filled with sediment points to polychaete families such as Pectinariidae, Ampharetidae, or Terebellidae. The thick golden chaetae look like they could be pectinariid paleae. They seem to be scattered all over - maybe because the specimen has been partly digested. Have you seen any uncini on the specimen? This might help you to determine what it is.
It might be impossible to determine what genus or species it is.
Un gusano de fuego (Amphinomidae) podría ser, porque a diferencia de Pectinariidae las setas del cuerpo son más pequeñas, aunque la imagen no deja apreciar más detalles.
Today I rechecked my samples and decided to take more photos, I'll show you some
In one photo i put paleae and body chaetae in order to differentiate them.
In another I put what might be uncini, please let me know if I'm wrong.
Those thick golden chaetae do look like Pectinariidae paleae. It is really hard to distinguish the uncini in the photos. But in the second photo of the new ones you posted, I do see little stripes on the tissue. This looks like it might be several series of uncini. I would put them under a compound scope and look at them with a high magnification lens - 40x or 60x should do. If you can identify them as uncini, I think Pectinariidae would be a reasonable guess!
I agree with Michael. The species seems to be like Pectinariidae sp. But the actual name of this species will be said surely if more magnified pictures can be given to us for ready references. However, nice attempts by Francisco.
agree with Michael. The species seems to be like Pectinariidae sp. But the actual name of this species will be said surely if more magnified pictures can be given to us for ready references.
Yes the new pictures seem to indicate Pectinariidae. Nice additional work on getting more photos as suggested by Michael. A review of local species in the family will suggest a possible species name, but may not confirm. However there is usually only one species in a given region as the family Pectinariidae is not very diverse.
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