Show threadmillerebondsDec 27, 2024
@miko J'aime bien, j'ai bien rigolé.
C'est pas sympa pour les novices ,o)
Car, pas compliqué à compter pas compliqué à compter...
Là cet arachnide combien de pattes:
https://upload.wikimedia.org/wikipedia/commons/thumb/7/7e/Sun_Spider_%28Solifugae%29_%2816255577778%29.jpg/1920px-Sun_Spider_%28Solifugae%29_%2816255577778%29.jpg
et celui-ci :
https://external-content.duckduckgo.com/iu/?u=http%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2F1%2F14%2FLimule_-_Malaysia.jpg&f=1&nofb=1&ipt=b9ed5cde72fd8030817e9a7654322f5e68976f6a04d8a79a55887947ada3e491&ipo=images
Et là ?.
https://fr.m.wikipedia.org/wiki/Amblypygi
Et là ?
https://bugguide.net/images/raw/T01/QT0/T01QT01Q30GQB0LKT02QRSWQVKUQF0AQVKUQAKBQJ07K30MKAKUQA0SKNKKKEK4QD0QKPKRK6KXK1K.jpg
Il y a un truc ,o)
C'est pas de 6 à 12
#arachnides #scorpions #limule #zoologie #evolution #araignees #eurypterides #pattes #acariens #cephalothorax #booklungs #araignee #toiledaraignee #tiques
PLOS BiologyAug 30, 2024
What establishes the boundary between the two sections of a #spider's body plan (#cephalothorax & #abdomen)? This study identifies a new gene named "waist-less" (an Iroquois paralogue) that is required for patterning the spider body plan #PLOSBiology https://plos.io/478Wn1T
A taxon-restricted duplicate of Iroquois3 is required for patterning the spider waist

The chelicerate body plan is unique among arthropods because segments are divided into two tagmata – cephalothorax and abdomen – but the mechanisms that establish the boundary between them remains unclear. Here, the authors identify a new gene named waist-less that is required for patterning the spider body plan.