cyclostome造句

• Most erect cyclostomes develop bushy colonies with narrow, bifurcating branches.
• Little is known about the reproductive ecology of cyclostomes.
• The cyclostome bryozoans were dominant in the Mesozoic; since that era, they have decreased.
• Many cyclostomes have encrusting colonies, firmly cemented to hard substrates such as rocks and shells.
• Currently, cyclostomes seldom constitute more than 20 % of the species recorded in regional bryozoan faunas.
• All post-Palaeozoic cyclostomes have interzooidal connections via pores in the vertical walls separating adjacent zooids.
• Gonozooids are also very important in the taxonomy of cyclostomes, particularly in the largest suborder the Tubuliporina.
• They are Cyclostomes ( Circle mouths ), a primitive fish-like creature, and are not related to eels.
• The silver lamprey is a member of the Class Agnatha, sometimes referred to as cyclostomes ( round-mouths ).
• Cyclostomes apparently split from other agnathans before the evolution of dentine and bone, which are present in many fossil agnathans, including conodonts.
• Recent molecular data, both from rRNA and from mtDNA as well as embryological data strongly supports the hypothesis that living agnathans, the cyclostomes, are monophyletic.
• Most of the ostracoderms, such as thelodonts, osteostracans, and galeaspids, were more closely related to the gnathostomes than to the surviving agnathans, known as cyclostomes.
• Dohrn claimed cyclostomes such as lampreys are degenerate fish as there is no evidence their jawless state is an ancestral feature but is the product of environmental adaptation due to parasitism.
• The original scheme groups hagfish and lampreys together as cyclostomes ( or historically, Agnatha ), as the oldest surviving class of vertebrates alongside gnathostomes ( the now-ubiquitous jawed vertebrates ).
• Little is known about predation specifically on cyclostomes although it is likely that they are preyed upon by the nudibranchs ( sea-slugs ), pycnogonids ( sea-spiders ), echinoids and fishes which consume other marine bryozoans.
• Mertz obviously isn't simple-minded, not with published articles under his belt such as " The Cyclostome Bryozoan Crisiid eburnea and Idmonea atlantica in the Modern Reefs of the Bermuda Complex : Comparative Data of Paleoecology and Paleobryozoology ."
• The appearance of the early vertebrate jaw has been described as " a crucial innovation " and " perhaps the most profound and radical evolutionary step in the vertebrate history " . cyclostomes, the jawless hagfishes and lampreys that did survive, have yielded little insight into the deep remodelling of the vertebrate skull that must have taken place as early jaws evolved.
• Up until recently ( 2008 ) there were " inadequately known and misunderstood type species belonging to the Cyclostome Bryozoan family Oncousoeciidae . " ( Taylor, Zaton 2008 ) Modern research and experiments have been done using low-vacuum scanning electron microscopy of uncoated type material to critically examine and perhaps revise the taxonomy of three genera belonging to this family, including " Oncousoecia ", " Microeciella ", and " Eurystrotos ".