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A unique feature of the venom is the presence of a D-amino acid. This is the only known such example in mammalian systems. [8] This venom appears to be related to that of several species that are not part of the platypus's evolutionary lineage, such as certain fish, reptiles, insectivores, and spiders, sea anemones, and starfish. [9]
Snake venom is a highly toxic saliva [1] containing zootoxins that facilitates in the immobilization and digestion of prey. This also provides defense against threats.
Platypus venom is entirely different from other venomous creatures. While more research is needed, scientists believe it contains specific proteins that target the nervous system. Heptapeptide 1 ...
The echidna spurs are vestigial and have no known function, while the platypus spurs contain venom. [42] Molecular data show that the main component of platypus venom emerged before the divergence of platypus and echidnas, suggesting that the most recent common ancestor of these taxa was also possibly a venomous monotreme. [43]
Jellyfish sting using microscopic cells called nematocysts, which are capsules full of venom expelled through a microscopic lance. Contact with a jellyfish tentacle can trigger millions of nematocysts to pierce the skin and inject venom. [9] Some hydrozoans, including the Portuguese Man o' War (Physalia physalis) Some sea anemones; Some corals
Platypus venom is likely retained from its distant non-monotreme ancestors, being the last living example of what was once a common characteristic among mammals. [2] Fossil records show that venom delivery systems were not sexually dimorphic in ancestral monotremes . [ 18 ]
The venom of this species is highly potent, like that of other sea snakes. [45] Bites are rare and the most common victims are fishermen who try to get them out of fishing nets . [ 46 ] The subcutaneous LD 50 of the venom is 0.067 mg/kg and the venom yield per bite is 1.0–4.0 mg. [ 47 ] [ 48 ] Yellow-bellied sea snake venom contains several ...
The second species named, Obdurodon dicksoni, occasionally called the Riversleigh Platypus, [6] was described by Archer et al who detailed a skull and several teeth found in lower-middle Miocene deposits from the Riversleigh Ringtail Site. The type specimen, an exceptionally well preserved skull, is one of the most intact fossil skulls to be ...