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Isopod - Platyarthrus hoffmannseggii

Isopod - Platyarthrus hoffmannseggii
Brooklyn, Kings County, New York, USA
April 29, 2007
Size: about 3mm
Not sure of size but they were tiny. The antenae are very different from any other Isopds I could find on the web. Perhaps they are immatures.

Moved from Isopods. We made the page as indicated. Click on the Info tab and check that it is ok.

Ant woodlouse
I found several references on the web which give it a common name, Ant woodlouse.

Some more data
Just to be precise with my previous comment (and because it is a new taxon on I add the taxonomic classification of this species, however it is not very complicated:

Crinochaeta: family Platyarthridae
Genus: Platyarthrus Brandt, 1833
species: hoffmannseggii Brandt, 1833

Synonimies: Itea crassicornis, P. dollfusi, Typhloniscus steinii


Hi! It is a nice catch! [i]
Hi! It is a nice catch!
[i]Platyarthrus hoffmannseggii[i] is a myrmecophylous isopod, which means it lives in ant nests. Blind and it is not clear why ants don't eat them. It's not the only species from the Platyarthrhus genus, but [i]hoffmannseggi[i] is the most frequent world-wide.
Best wishes,

Oniscus asellus
Looks like immature Oniscus asellus. However, they could be Porcellio spinicornis. Either way they are immatures.

On these immatures I'm not qualified enough to determine which, so it's probably best to move them to the Oniscidea page and perhaps an Isopod expert can weigh in. Nice image.

Platyarthrus hoffmannseggi?
I thought it might be an immature but then a couple weeks back I found an Oniscidea key at which mentions the antennae as crucial to an ID. This critter didn't match. I checked the key again this morning but their server is off-line. I kept looking around and stumbled on images of a European species, Platyarthrus hoffmannseggi. It seems to match perfectly.

That's definitely a spot-on match, I just wasn't aware of Platyarthrus hoffmannseggi being in NA. But the morphology is certainly convincing.

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