Samples were taken from inter-tidal areas of South west coast of India. The size of the fauna is about >2mm. All comes under the umbrella of marine meiofauna.
(b) looks like a kind of echinoderms or acadian larva
(c) looks like a kind of Digenitic Trematodes
(d) looks like a kind of Cestodes
(f) looks like a kind of isopoda or amphipoda
It is often difficult to say with only one microphotographic view. (a) is likely a protist, (c) is probably a polychaete palp or related structure broken off of a macrofaunal individual, and (f) is probably an isopod. (d) might be a turbellarian or maybe a nemertean, but it is difficult to make a definitive statement due to limited view quality. I can't really say on the others. Cheers.
C looks life a polychaete fragement. F looks like some kind of Copepod, but I can not really be sure from the photo. I am not sure about the rest, more photos would likely help!
I agree with Ton van Haaren: c = polychaete, f = isopod.
b could be an echinoderm larva, but I'm unsure,
d appears to have a convoluted gut tube, ruling out any kind of flatworm; my best guess is from one of the minor coelomate phyla: a Sipunculid or Echiuroid
e is a mystery to me
a is a highly resistant item (note lack of Rose Bengal dye); could be a pollen grain (frequent micro-artifact in plankton and benthic samples).
A) probably a protozoan
B) Echinoderm larva
C) Looks like a polychaete (maybe only a fragment) - check for chaetae
D) Maybe a nemertean, maybe a palp of a polychaete
E) no idea
F) That's certainly an Isopod
With photos of these features (low maginification and quality) only tentatively can propose you the following taxa, but this implies that not everything is meiobenthos...
a) Resting egg of Tardigrada; b) Like a loricate Ciliophora; c) Annelida Polychaeta; d) Nemertini like; e) Acanthocephala; Crustacea Isopoda.
Please, could you upload photos with details of the named as "b", "d" and "e". And by identifying the species of turbellarians do not hesitate to write me.
I think;
a) looks like a pollen,
b) maybe a kind of zooid (zooid; one of organelle of Hydrozoa),
c) Annelida: Polychaeta,
d) looks like a Nemertea,
e) it's hard to me,
f) Crustacea: Isopoda.
it's definitely not a Doliolum! It lacks muscle bands and is not ovoid enough.
a )ydromedusae-porpita b)siphonophore c)sagittal enflata d)Oikopleura-ascidian
e)Sagitta sp. f) Heteroneries-polychaete
It would be great if you can re-take the pictures but from another angle and with better resolution (improve contrast).
a) A larva of cnidarians
b) A tunicate larva (maybe, it is in bad conditions to be sure)
c) A Polychaete (Spionidae)
d) I think it is a Turbellarian
e) I remember finding one of these (whatever) in Central Peru (meiofauna samples), but unfortunately I could not identify. It is a hard structure?
f) An Isopod (maybe Paramunnidae)
c) A polychaete, I would say that it does not look as a Spiniodae quite surely. Maybe Terebellidae or Sabellidae but has lost its tufts.
I would suggest that you take other pics closer to the individuals and explain where and how they were collected. It will help people to help you
Already I gave the precise identification of the forms shown in the photo. why do you continue to ask the sane queries again and again, time is precious remember that.
With the data available we (and you) can only make wild guesses... I would suggest that you look at living material in the future. You miss a wonderful and an amazing world when you only look to fixed samoles. Moreover it is mostly much easier to identify the soft-boddied animals while they are alive. There are easy techniques to concentrate the living meiofuana and to get rid of the sand. See https://www.researchgate.net/publication/259850232_Turbellarians?ev=prf_pub
Chapter Turbellarians
Well, I am not a marine meiofauna expert, but have some experience with freshwater meiofauna. To me, pic "a" is a tardigrade egg although it is hard to tell with no scale bar shown. Pic "f" is an isopod. I could guess pic "d" is a nemertean and pic "c" a polychaete. Not a clue with pics "b" and "e".
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