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There are gaps between invertebrates and vertebrates (Talk.Origins)
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- No fossils have been found transitional between invertebrates and vertebrates.
Source: Morris, Henry M., 1974. Scientific Creationism, Green Forest, AR: Master Books, p. 82
While references are made to millions of years, such dates are based on unformitarian dating methods and are not accepted by CreationWiki.
(Talk.Origins quotes in blue)
1. There are Cambrian fossils transitional between vertebrate and invertebrate:
- a. Pikaia, an early invertebrate chordate. It was at first interpreted as a segmented worm until a reanalysis showed it had a notochord.
- b. Yunnanozoon, an early chordate.
- c. Haikouella, a chordate similar to Yunnanozoon, but with additional traits, such as a heart and a relatively larger brain.
- d. Conodont animals had bony teeth, but the rest of their body was soft. They also had a notochord.
- e. Cathaymyrus diadexus, the oldest known chordate (535 million years old).
First of all these are clearly all invertebrates. They all have spinal cords that are part of a functional nervous system, but they lack a spine. This exactly what one would expect to find in invertebrates with nervous systems. Claiming such animals as transitional between vertebrate and invertebrate is evolutionary presupposition at its worst.
The only ones even remotely showing a hint of a skeleton are the conodonts with bony teeth, and these give no hint a evolving into skeletons. Furthermore the oldest dates assigned these teeth by Evolutionists is 500 million year, which would make them younger than the oldest vertebrates.
In saying that Haikouella has additional traits when compared to Yunnanozoon, Talk Origins fails to mention how poorly Yunnanozoon is preserved. In fact it is not certain as to whether or not Yunnanozoon had a hart. Even if Yunnanozoon did not have a hart and Haikouella did, there is no hint of evolution here since Haikouella had a fully formed and functioning hart.
f. Myllokunmingia and Haikouichthys, two early vertebrates that still lack a clear head and bony skeletons and teeth. They differ from earlier invertebrate chordates in having a zigzag arrangement of segmented muscles, and their gill arrangement is more complex than a simple slit
Myllokunmingia and Haikouichthys are both dated by evolutionists at 530 million years. Which would be just 5 million years after what Talk Origins calls the oldest known chordate. They are fish with fully formed and functional cartilage skeletons, no hint of a transition. Fish exist today with cartilage skeletons most notably sharks. There is no evidence of the development of a skeleton from no skeleton, just poof instant cartilage skeletons. Thank you Talk Origins for proving this claim to be 100% correct.
2. There are living invertebrate chordates (Branchiostoma [Amphioxus], urochordates [tunicates]) and living basal near-vertebrates (hagfish, lampreys) that show plausible intermediate forms.
First of all this vague and probably rather subjective. Second they are 500+ million years out of place. This is an excellent example of the Evolutionary mind set, that any similarity can evidence of a relation ship.