part of part of preaxialmost part of Aves manual digit 1 http://upload.wikimedia.org/wikipedia/commons/6/64/Thumb-up.jpg https://upload.wikimedia.org/wikipedia/commons/2/2c/Thumbs_up.jpg hand digit 1 manual digit I FMA:24938 MESH:D013933 fore digit I Not present in Anurans (Phenotype RCN Oct 2012) AAO:0010639 This class represents the standard tetrapod configuration. Wagner proposes that avian digits I,II,III develop from C2,C3,C4. To support this scheme we have separate classes representing the avian digits (here called alula, manual digit, major digit). digitus I manual digit 1 forelimb dewclaw digitus primus Wikipedia:Thumb NCIT:C52834 fore limb digit 1 pollex digitus 1 UMLS:C0040067 EMAPA:17429 SCTID:69603001 GAID:58 digitus primus [I] MA:0000454 UBERON:0001463 thumb 1st (preaxial) digit of the manus[Wikipedia]. digit 1 of fore-paw SCTID:302540006 EHDAA2:0000511 first digit of hand first finger hand digit 1 finger 1 digit 1 of manus alula manus digit 1 manual digit 1 or 5 manual digit 1 plus metapodial segment