#placoderms
Live, measured metrics for the hashtag #placoderms from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #placoderms
This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.
Day-by-day usage
measured · fosstodon.org (Mastodon public tags API) · fetched 2026-09-10 22:29 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · fosstodon.org (Mastodon public search API) · fetched 2026-09-10 22:29 UTCNo related tags with measured usage found for #placoderms.
Live pulse
measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-09-10 22:29 UTCEverything below is measured over the latest 2 public posts (spanning ~19380 hours).
Posting hours (UTC)
Languages: English (2)
Avg boosts / post: 2
Top of the latest posts
A 365-million-year-old #fish with an extreme underbite showcases #vertebrate diversity https://phys.org/news/2024-01-million-year-fish-extreme-underbite.html Extreme lower jaw elongation in a #placoderm reflects high disparity and modularit
Another recording from the Paleo 2026 symposium has been posted! Learn about recent research on placoderms (early armoured fishes like Dunkleosteus) with Dr. Melina Jobbins of the University of Manitoba! https://youtu.be/uP6ta7MP1ZY #palaeo
What “placoderms” means
WikipediaPlacoderms are vertebrate animals of the class Placodermi, an extinct group of prehistoric fish known from Paleozoic fossils during the Silurian and the Devonian periods. While their endoskeletons are mainly cartilaginous, their head and thorax were covered by articulated armoured plates, and the rest of the body was scaled or naked depending on the species.
“Placoderm” on Wikipedia (CC BY-SA) →#placoderms across platforms
every network with a public tag surfaceFollow #placoderms straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.
Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/placoderms