How far back this lineage goes — and how we know. Everything here is measured in Ma, short for “mega-annum”: millions of years ago. The chart reads left to right like a calendar of the Earth, from the deep past on the left to today at the right edgetop to bottom like a core drilled through the Earth, from the deep past at the top down to today at the bottom.
At a glance
DNA clock origin20.7 Ma TimeTree
When this lineage existed
How to read this: the coloured strip along the bottomdown the left is the geological calendar — the standard epochs (Pliocene, Pleistocene…) every museum uses, shown so you can see which chapter of Earth's history this lineage lived in. This lineage is a young one, so the strip is zoomed in to epochs — the finer subdivisions inside a period. The orange marker is the DNA clock: DNA accumulates mutations at a roughly steady rate, so comparing this species' DNA with its relatives estimates when the lineage split off — independently of any fossil.
DNA clock origin
08Occurrence & distribution
Record type21 records
Museum / vouchered17
Other4
Range
Area of Occupancy AOO44 km²
Depth
0–200 m sunlit2
200–1000 m twilight3
1–4 km midnight0
>4 km abyssal0
median 220 m · max 230 m · 5 records with depth
Museum / Voucheredphysical evidence
Backed by a physical specimen — a herbarium sheet, sample or voucher held in a collection. “Vouchered” means supported by material evidence, not just an observation.
Coordinate accuracy0% within 1 km
≤10 km 4
4 georeferenced · 13 without coordinates
Open the institutions mapphysical evidence17
10Collections & institutions
Holding institutions2 of 4 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Santa Barbara Museum of Natural Historylocation not on record
6
Paris, FR
3
Natural History Museum Rotterdamlocation not on record
