{"action":"created","issue":{"url":"https://api.github.com/repos/obophenotype/uberon/issues/135","repository_url":"https://api.github.com/repos/obophenotype/uberon","labels_url":"https://api.github.com/repos/obophenotype/uberon/issues/135/labels{/name}","comments_url":"https://api.github.com/repos/obophenotype/uberon/issues/135/comments","events_url":"https://api.github.com/repos/obophenotype/uberon/issues/135/events","html_url":"https://github.com/obophenotype/uberon/issues/135","id":7605996,"number":135,"title":"Review cranial placodes","user":{"login":"cmungall","id":50745,"avatar_url":"https://avatars.githubusercontent.com/u/50745?v=3","gravatar_id":"","url":"https://api.github.com/users/cmungall","html_url":"https://github.com/cmungall","followers_url":"https://api.github.com/users/cmungall/followers","following_url":"https://api.github.com/users/cmungall/following{/other_user}","gists_url":"https://api.github.com/users/cmungall/gists{/gist_id}","starred_url":"https://api.github.com/users/cmungall/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cmungall/subscriptions","organizations_url":"https://api.github.com/users/cmungall/orgs","repos_url":"https://api.github.com/users/cmungall/repos","events_url":"https://api.github.com/users/cmungall/events{/privacy}","received_events_url":"https://api.github.com/users/cmungall/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/obophenotype/uberon/labels/core","name":"core","color":"000000"},{"url":"https://api.github.com/repos/obophenotype/uberon/labels/review","name":"review","color":"e102d8"}],"state":"open","locked":false,"assignee":{"login":"mellybelly","id":796636,"avatar_url":"https://avatars.githubusercontent.com/u/796636?v=3","gravatar_id":"","url":"https://api.github.com/users/mellybelly","html_url":"https://github.com/mellybelly","followers_url":"https://api.github.com/users/mellybelly/followers","following_url":"https://api.github.com/users/mellybelly/following{/other_user}","gists_url":"https://api.github.com/users/mellybelly/gists{/gist_id}","starred_url":"https://api.github.com/users/mellybelly/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mellybelly/subscriptions","organizations_url":"https://api.github.com/users/mellybelly/orgs","repos_url":"https://api.github.com/users/mellybelly/repos","events_url":"https://api.github.com/users/mellybelly/events{/privacy}","received_events_url":"https://api.github.com/users/mellybelly/received_events","type":"User","site_admin":false},"milestone":null,"comments":2,"created_at":"2012-10-15T21:10:29Z","updated_at":"2016-05-21T03:30:23Z","closed_at":null,"body":"Some points to consider:\r\n\r\n * check scheme for accommodating different usages of the term (generic placode, cranial placode, neurogenic placode)\r\n * See vagal placodes #133\r\n * Check develops_from to placodes.\r\n * Should placodes be split into epithelial and mesenchymal parts? See EHDAA2\r\n * Check develops_from leading from placodes to ganglia and nerves - document mixed contribution from neural crest\r\n * Check cl\r\n * Check we have everything in http://www.ncbi.nlm.nih.gov/books/NBK53175\r\n * Check taxon constraints, particularly: are there invertebrate placodes in the sense defined here: https://github.com/geneontology/go-ontology/issues/12223#issuecomment-215692347"},"comment":{"url":"https://api.github.com/repos/obophenotype/uberon/issues/comments/220756039","html_url":"https://github.com/obophenotype/uberon/issues/135#issuecomment-220756039","issue_url":"https://api.github.com/repos/obophenotype/uberon/issues/135","id":220756039,"user":{"login":"cmungall","id":50745,"avatar_url":"https://avatars.githubusercontent.com/u/50745?v=3","gravatar_id":"","url":"https://api.github.com/users/cmungall","html_url":"https://github.com/cmungall","followers_url":"https://api.github.com/users/cmungall/followers","following_url":"https://api.github.com/users/cmungall/following{/other_user}","gists_url":"https://api.github.com/users/cmungall/gists{/gist_id}","starred_url":"https://api.github.com/users/cmungall/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cmungall/subscriptions","organizations_url":"https://api.github.com/users/cmungall/orgs","repos_url":"https://api.github.com/users/cmungall/repos","events_url":"https://api.github.com/users/cmungall/events{/privacy}","received_events_url":"https://api.github.com/users/cmungall/received_events","type":"User","site_admin":false},"created_at":"2016-05-21T03:30:23Z","updated_at":"2016-05-21T03:30:23Z","body":"## CHORDATE SPECIFICITY ##\r\n\r\n```\r\nid: UBERON:0005085\r\nname: ectodermal placode\r\ndef: \"An ectodermal placode is a thickening of the ectoderm that is the primordium of many structures derived from the ectoderm[GO]\" [GO:0060788]\r\nproperty_value: editor_note \"consder adding placodal ectoderm as a distinct class? Also place placodal ectoderm as develops_from ectoderm; need to check taxon-appropriateness\" xsd:string\r\nproperty_value: taxon_notes \"With the exception of the adenohypophysis, homologues of the nonneurogenic placodes (e.g. placodes giving rise to the teeth, hair follicles and lens), appear to be lacking in invertebrate chordates.\" xsd:string\r\nis_a: UBERON:0001048 ! primordium\r\nrelationship: part_of UBERON:0000924 ! ectoderm\r\nrelationship: only_in_taxon NCBITaxon:7711 {source=\"PMID:22512454\"} ! Chordata\r\n```\r\n\r\nhttp://www.ncbi.nlm.nih.gov/pubmed/22512454\r\nThe origin and evolution of the ectodermal placodes.\r\n\r\n_Many of the features that distinguish the vertebrates from other chordates are found in the head. Prominent amongst these differences are the paired sense organs and associated cranial ganglia. Significantly, these structures are derived developmentally from the ectodermal placodes. It has therefore been proposed that the emergence of the ectodermal placodes was concomitant with and central to the evolution of the vertebrates. More recent studies, however, indicate forerunners of the ectodermal placodes can be readily identified outside the vertebrates, particularly in urochordates. Thus the evolutionary history of the ectodermal placodes is deeper and more complex than was previously appreciated with the full repertoire of vertebrate ectodermal placodes, and their derivatives, being assembled over a protracted period rather than arising collectively with the vertebrates_\r\n\r\nOf course, this paper may be claiming the label for something more specific than simply a lump of ectodermal tissue with developmental potential --- need to tease this out"}}
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