Christian Nilsson (He/Him)

More evidence that basically anything can be worm🪱

Ostracod: Thalassocypria cumangulus n. sp.: 4976/08, holotype, female. Scale bar 100 μm https://www.tandfonline.com/doi/full/10.1080/08912963.2017.1340471

Copepod: Ectinosomatidae (IHNFG–4899/Cop1); A1 = antennule, A2 enp = antennary exopod, A2 enp = antennary endopod, GDS = genital double-somite, AS = anal somite. Scale bar 200 μm. Photo from Francisco Vega

Isopod: Palaeospherarmadillo rotundus gen. nov. sp. nov., adult holotype (IHNFG-5302); General habitus, lateral view. Scale bar = 200 µm. http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/639

Crab: Sesarmidae. Dorsal view of cephalothorax, specimen IHNFG-4991. LCh = left cheliped, P2-P5 = pereiopods, RCh = right cheliped. Scale 3 mm http://boletinsgm.igeolcu.unam.mx/bsgm/vols/epoca04/6801/(6)Serrano.pdf

Aquatic crustaceans of MANY types are fossilized in amber from 23 mya Mexico, but amber comes from tree sap - how did crustaceans get there??? We think the fossils may come from estuarine mangroves. Shown here are ostracods, copepods, isopods, and even CRAB.

#Crustmas 🧪🦑

Paper list in next skeets

Didn’t work to tag people when I wrote the post, but a massive shoutout to my supervisors @hwiklund.bsky.social and @mucofloris.bsky.social for making this happen!

Ok so here comes a starter pack to find your favourite polychaete/annelid researchers. I have not yet found many of us, so let me know if you want to be included or know of others that should be included.

For added context to the word ”sprattel”, it does mean flail, kind of. But more in the way of a kid who’s had too much sugar and can’t sit still. A behaviour shared by the occassionally very active Hesionids, hence the name ”sprattelmask”🪱🫨

A gorgeous pic of a gorgeous worm, taken by my officemate who is out in the water way more than me. Oh how I wish there was a better english word for ”sprattel” than ”flail”. Hesionids (sprattelmaskar) definitely have one of the cutest Swedish common names🥹🪱

I recently described a new species of deep-sea polychaete found in high abundance on an abyssal wood-fall in the Clarion-Clipperton zone.

Feel free to check it out to get your fill of wood, worms, and wonderful taxonomic mysteries!

doi.org/10.1016/j.ds...

Thank you so much! Hopefully the first of many to come🪱