Rules of Nomenclature 57 



•i 



When 



must be kept and given to the division containing the nomencia- 

 torial type. The nomenclatorial type of a genus or subgenus is 

 the species originally named or designated by the author of the 

 name. If no species was designated, the type is the first binomial 

 species in order ehgible under the following provisions : 



l*^. The type is to be selected from a subgenus, section, or 



other list of species originally designated as typical. 



The publication of a new generic name as an avowed 



substitute for an earlier invalid one does not change the 



type of a genus. 



Examples. — Dlapoi-ihe Nitschke, Pyren. Germ. 240 (1S70), is 



typified by D, eres Nitschke, the first species of the subgenus Euporthe ; 



Psilogram?7ie Kuhn, Festschr. 50-Jahr. Jub. Konigs. Realschule zu Berlin 



332 (1882), is typified by the first-mentioned species of the second 



section Eupdlogramme^ and not from species included in the first section 



Jamesonia^ which is based on a generic name previously published ; 



Phania DC. Prodr, 5 : 114 (1826) is typified by P, muUicauUs DC, the 



only species of the section Eupkania ; Gtdgnardia Viala & Ravaz, Bull. 



Soc. Myc. Fr. 8 : 63 ( 1892), which was substituted for Laestadia Auers, 



Hedwigia 8: 177 (1869) not Laestadia Kunth in Less. Syn. Compos. 



203 (1832), is typified by Laestadia alnea (Fr. ) Auers., which is the first 



of the three species given by Auerswald, and not by Laestadia Bidwellii 



(Ellis) Viala & Ravaz, the only species mentioned by Viala & Ravaz at 



the time the substitution was made. 



2^. The application to a genus of a former specific name of 



one of the included species, designates the type. 



Examples. — Sordaria Ces. & DeN. Comm. Soc. Critt. Ital. i : 

 225 (1863) is typified by Sphacria Sordaria Fr., one of its twelve original 

 species ; Roccella DC. Fl. Fr. 2 : 334 (1805) is typified by Lichen Rec-^ 

 cella I.., one of its two original species; Calypogeia Raddi, Atti Soc. Ital, 

 Sci. Mod. 18 : 42 (l8lS), is typified hy Jufjgermaf7nia Calypogeia Raddi, 

 one of its three original species; Amsonia Walt. FL Car. 98 (1788) 

 is typified by Tabernaemoniana Affisonia L., one of its two original 

 ■ species. 



3°. A figured species is to be selected rather than an unfig- 



ured species in the same work. In the absence of a 

 figure, preference is to be given to the first species ac- 

 companied by the citation of a specimen in a regularly 

 pubHshed series of exsiccatae. In the case of genera 

 adopted from prebinomial authors (with or without change 

 of name), a species figured by the author from whom the 

 genus is adopted should be selected. 





