Apparently, some 530 million years ago (give or take) in the #Cambrian age, after about 2.5 billion years of rather plodding #evolution, bi-lateral symmetry appeared in animals (after some dabbling in tri-lateral and penta-lateral symmetry) and when brains showed up they were bi-lateral. #Vertebrate, but still #jawless, fishes were swimming after each other for lunch. #Eyes, which had already existed for a long while, started showing up in pairs, at the head end of the fishes. (1/3)

El Lochmanolenellus trapezoidalis fue un trilobite, encontrado en Nevada, Estados Unidos y en las montañas Cassiar, Canadá, que vivió en el Cámbrico (524-512 MdA). Se distingue por su ancho cefalón con prominentes espinas genales, pero ni de lejos las más grandes. Orm #trilobite #cambrico #cambrian

El Vetulicola rectangulata era un pequeño deuteróstomo del Cámbrico temprano compuesto por un cuerpo rectangular cubierto con placas, que dejaban un hueco para una pequeña boca plana, con una cola en la zona posterior que usaba para nadar.PaleoNeolitic #cambrico #cambrian

My 25 years of palaeoart chronology...

Last post from 2020. Here's "The Early Worm Catches the . . . ", showing a monster Ottoia ambushing some Cambrian critters. This fossil is discussed in Locked in Time, by Dr Dean Lomax.

This will be a challenge to the fediverse connecting abilities: I need to make a costume of a #trilobite and of #Anomalocaris. I am looking for any help: someone has made one already and is happy to share the details, a costume designed willing to take up the challenge, a handwork hobbyist with a knack for sewing/cardboard magic who always want to launch their skills onto a bigger stage. We are making a #science show for kids as part of my #ERC project MindTheGap and we will be explaining #evolution using #fossils. #Cambrian fossils If you have any hints, contacts, old costumes, please get in touch. We are located in NL so we probably cannot commission costumes from overseas (too much risk of delay due to customs). #Outreach #ScienceCommunication #paleontology

El Isoxys fue un artrópodo depredador del Cámbrico (520-495 MdA) con un caparazón bivalvo en forma de empanadilla o taco. Con las patas que sobresalen habría atrapado a sus presas. Holly Sullivan #cambrico #cambrian

Flight: #CBM77
Registration: G-OLIV
ICAO code: #400A86
Callsign: #CAMBRIAN
Operator: Dragonfly Aviation Services Limited
Type: BEECH KING AIR 200
Country:
Speed: 423 kmh
Altitude: 1173 m
Distance: 2.9 km
Angle ∆: 22.1°
Direction ->: E
Track:
https://tinyurl.com/2yg38x7p
History:
https://www.radarbox.com/data/mode-s/400A86
https://www.flightradar24.com/data/aircraft/G-OLIV
Photos:
https://jetphotos.com/photo/keyword/G-OLIV
Seen: 1st x

Thinking about fossil marine invertebrates that Keilan-Jaworowska studied at the beginning of her career, made me think of this pattern made from my linocut animal prints with collaged washi papers from the Cambrian Period (from 538.8 million to 485.4 million years ago).

https://www.spoonflower.com/en/fabric/16990670-cambrian-sea-by-minouette

My 25 years of palaeoart chronology...

The draft images and some photos of my finished Timorbestia (stem-group chaetognath/arrow worms) model. I was commissioned in 2020 to reconstruct the 520 million year old, Cambrian fossil.

My 25 years of palaeoart chronology...

And it's FossilFriday! So here's a 520 million year old fossil of Timorbestia, a stem-group chaetognath (arrow worms). In 2020 I was commissioned to build a life-size model of this beauty.

You know what? Sod this #JurassicPark rubbish.

I want a #Cambrian Park, please. Bring back the #BurgessShale #hallucigenia !

My 25 years of palaeoart chronology...

In 2020 I illustrated LOCKED IN TIME, written by Dr Dean Lomax - Palaeontologist. Here's my "Eonurture" painting, which depicts an adult Fuxianhuia caring for several babies (Cambrian arthropod parental care!).

https://cup.columbia.edu/book/locked-in-time/9780231197281

En el Cámbrico, hace 500 millones de años, en los mares vivía el Balhuticaris voltae, un enorme artrópodo de 24,5 cm y 110 segmentos consecutivos con patas.Alejandro Izquierdo Lopez #cambrico #cambrian

Oldest-known evolutionary arms race https://phys.org/news/2025-01-fossil-reveals-oldest-evolutionary-arms.html

Adaptive responses in #Cambrian predator and prey highlight the arms race during the rise of #animals https://www.cell.com/current-biology/abstract/S0960-9822(24)01647-6

"These 517-million-year-old predator-prey interactions occurred between a small, shelled #animal distantly related to #brachiopods and an unknown marine animal capable of piercing its shell... an increase in shell wall thickness coincides with an increase in the number of perforated shells"

Rare #fossil embryos show early #Ecdysozoa development in #Cambrian era https://phys.org/news/2024-12-rare-fossil-embryos-early-ecdysozoa.html paper: https://www.sciencedirect.com/science/article/abs/pii/S0031018224006242

"it suggests a bag-shaped body is likely primitive for #ecdysozoans (a diverse group of #animals including #roundworms, velvet #worms, #insects, and #crabs), while a vermiform body, characteristic of crown-group ecdysozoans, evolved later."

#Fossil of #Cambrian Long-Headed Chordate Unearthed in #Utah https://www.sci.news/paleontology/nuucichthys-rhynchocephalus-13130.html

A long-headed Cambrian soft-bodied vertebrate from the #AmericanGreatBasin region https://royalsocietypublishing.org/doi/10.1098/rsos.240350

"#Nuucichthys rhynchocephalus swam in the Cambrian #oceans between 505 and 500 million years ago. It had a finless torpedo-shaped body that includes a number of markers characteristic of #vertebrates. It is one of only four species documenting the early evolutionary stage of vertebrate lineage."

El poliqueto Dannychaeta tucolus del Cámbrico, hace 514 millones de años, que vivía en tubos orgánicos en el fondo marino, donde se ocultaba para lanzarse cuando se acercaba una presa.Robert Nicholls #cambrico #cambrian