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Discuss the two phylogenetic theories of the phylum tardigrada. Describe the evidence for each idea. Where...

Discuss the two phylogenetic theories of the phylum tardigrada. Describe the evidence for each idea. Where do you think the “water bears” fit into evolutionary relationships?

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Answer #1

1. Pseudocoelomates to be classified with rotifers; conjointly attributable to cryptobiosis and reproduction tendencies of parthenogenesis.

2. cluster with arthropods because of many synapomorphies, DNA sequencing, and similar morphological similarities.

The "water bears" are considered a sister cluster of arthropods, onychophorans, onychophorans and arthropods, and nematodes.

They show similarities to having unjointed limbs (onychophorans), segmental organization in nervous system (arthropods).

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