This week’s Fossil Friday is the preserved cast of a late Cretaceous crayfish, Eryma ornatus, found in Southern Alberta.

It was found by Lawrence Halmrast and is APS 1990.011. Photo credit Howard Allen.

#palaeontology #paleontology #fossils #crayfish #alberta #fossilfriday

#NewSpecies!
New freshwater crayfish from #indonesia just surfaced:

Cherax arguni

Treatment: https://treatment.plazi.org/id/03E3E33C-FFE7-FFAE-FE56-3E10FDFAFE58
Publication: https://doi.org/10.3390/arthropoda3020010
#Arthropoda #CheraxArguni

#FAIRdata
#science #OA #openaccess #biology #taxonomy #ecology #biodiversity #nature #wildlife #conservation #animals #fauna #invertebrates #arthropods #crustacea #crayfish #freshwater

One of the highlights of my day was when William Harland, a talented ecology undergrad here at #LincolnUniversityNZ, stopped by my office to show me his photos of temnocephalid flatworms. These distinctive squat tentacled flatworms live in colonies on NZ's freshwater crayfish, koura, and eat scraps left over when the koura feed. They apparently cause no bother to the koura.

William found these at Poolburn Reservoir in central Otago.

Amazing!

The photo is CC-BY William Harland: https://inaturalist.nz/observations/341041723
Here are more photos of these crazy flatworms on #iNaturalistNZ: https://inaturalist.nz/observations?verifiable=true&taxon_id=868829&place_id=6803&preferred_place_id=6803

#invertebrates #flatworms #NaturalHistory #NZ #Freshwater #crayfish #crustaceans #nature #crayfish

This is not a crab.
It’s a rusty crayfish — a freshwater bruiser that eats plants, evicts natives, and raises its claws like it wants the argument.
Be crabby if you want.
It still isn’t a crab.

Orconectes rusticus https://www.cernunnosfoundation.com/nature-pictures/orconectes-rusticus/ #Crayfish

#NewSpecies!
New freshwater crayfish from #indonesia just surfaced:

Cherax bomberai

Treatment: https://treatment.plazi.org/id/03E3E33C-FFEC-FFB5-FE56-3EDEFB63FD7F
Publication: https://doi.org/10.3390/arthropoda3020010
#Arthropoda #CheraxBomberai

#FAIRdata
#science #OA #openaccess #biology #taxonomy #ecology #biodiversity #nature #wildlife #conservation #animals #invertebrates #arthropods #crustacea #crayfish #freshwater

Calculate and Visualise Flow Direction in QGIS

https://videos.qwast-gis.com/w/3bvhX8c3i8tscFSaTfTajx