I'd like to start off this journal entry by writing down all of the coolest biological names and terms in existence. This section will be updated every time I remember, discover, or rediscover the Most Awesome, Strange, and Weird names in all of the science of Life.
1. Nyctinasty
2.
Mimetaster3.
Suchomimus4.
Loligo (try saying that ten times fast! Come to think of it, say "tidepool tadpole" ten times fast.)
5. Amblypygi (Hi there, kids! I'm Ambly the Piggy!)
Anyway, here's something somewhat related: Although I do consider molecular systematics to be more trustworthy and sensible than basing everything on morphology, I've been reading about annelids lately and Articulata versus Trochozoa. Although Trochozoa is definitely a monophyletic taxon (

), I have suddenly come up with a bunch of evidence that may support Articulata as a subtaxon of that great group of squids, leeches,
Bonella, and sipunculans. The Polychaeta have long been considered the ancestors of arthropods, and the two groups have many possible homologous structures between them, like the presence of segmentation (obviously), ventral nerve chords and dorsal hearts, tagmosis, a slightly different cuticle that might be made chitinous by carb deposits, and of course parapodia. This last point was the most interesting one for me to look at. The generalized arthropod, such as an ostracod or trilobite, has two leg branches, the endopod on the bottom for walking, and the exopod on top for swimming and/or breathing. Similarly, the parapodia of polychaetes are divided into two top and bottom bits, the notopodium and the neuropodium, both of which are used for swimming. In addition, one taxon of polychaetes, the Phyllodocidae has developed its notopodia into gills, much like arthropod exopods. Although this does not indicate direct descent, it's pretty cool. If I got anything wrong here, and I probably did, or if you can provide more evidence that supports arthropods as ecdysozoans, and you probably can, be my guest; I'm just stating some things I realized recently,not start an argument.
On another lophotrochozoan note, I had a really awesome speculative biology idea for the Septibranchia
[link] and
[link] These derived lamellibranchs have turned their gills into little diaphragms for sucking water and crustaceans through their ginormous inhalant siphons and crushing them in their stomachs. Anyhoo, what if a certain group of nectonic marine predators went extinct and these awesome little clams started getting bigger and inhaling squid and stuff, and they could, like, swim by beating their shell valves like scallops, and Ooh! They could evolve really complex eyesight, like, cephalopod style, and like eat stuff, and, like, jet backward with their exhalant siphon and could have, like, a vestigial foot and ok I'm done now.