▪ I. homotype, n.
(ˈhɒməʊtaɪp)
[f. Gr. ὁµο- homo- + τύπος type.]
1. Biol. A part or organ having the same type of structure as another, a homologue; applied esp. to serially or laterally homologous parts in the same organism.
| 1840 T. A. G. Balfour Typ. Char. Nat. (1860) 64 A general likeness is sufficient in nature to constitute, in the eyes of naturalists, a type, and hence they speak of such as homologies or homotypes. 1849 Owen Nat. Limbs 19 The femur, the homotype of the humerus. 1854 ― Skel. & Teeth in Circ. Sc., Organ. Nat. I. 170 So far as each segment..is a repetition or ‘homotype’ of every other segment. 1872 Mivart Elem. Anat. 215 The successive vertebræ..are serial homologues, or homotypes. 1939 Ann. Ent. Soc. Amer. XXXII. 695 Homotype: 1. That which is constructed on the same plan or type—as metameres of the body. Not a nomenclatural term. |
2. Taxonomy. A specimen identified as a type by someone other than the author of the original description, after comparison with the holotype.
| 1896 Walsingham & Durrant Rules for regulating Nomencl. 13 A specimen named by another than the author, after comparison with the type, is called a Homotype... We have added the term Homotype to those proposed by Mr. Oldfield Thomas. 1939 Ann. Ent. Soc. Amer. XXXII. 695 Homotype:... 2. Equals Homoeotype. 1967 R. E. Blackwelder Taxonomy xxix. 591 Specimens identified as to time or person of identification. Metatypes, homotypes (homoeotypes), and so on. |
Hence homotypal (ˈhɒməʊtaɪpəl) a. = homotypic a. 1. homotypy (ˈhɒməʊtaɪpi, həʊˈmɒtipi), relation of homotypes; homology; esp. serial or lateral homology.
| 1849 Owen Nat. Limbs 29 To discern their *homotypal relations and their classification. 1871 H. Macmillan True Vine iii. (1872) 102 The vine presents a repetition both of homotypal parts and of homotypal arrangement of parts. |
| 1874 Pop. Encycl. s.v., *Homotypy, another term for serial homology. 1878 Bell Gegenbaur's Comp. Anat. 64 Homotypical organs..are often so changed that their homotypy cannot be recognised, and has to be worked out. |
▪ II. homotype, a. Cytol.
(ˈhɒməʊtaɪp)
[f. homo- + Gr. τύπος type n.1]
= homotypic a. 2.
| 1895 [see heterotype s.v. hetero-]. 1907 C. E. Walker Essent. Cytol. v. 46 The first division following the meiotic is very commonly given a special name—the ‘homotype’ division. 1920 L. Doncaster Introd. Study Cytol. v. 67 This second division is therefore spoken of as a homotype mitosis. |