282 Bulletin of Zoological Nomenclature ON THE QUESTION OF THE CORRECT NAME FOR THE TYPE SPECIES OF THE GENUS " STEPHANURUS " DIESING, 1839 (CLASS NEMATODA*, ORDER RHAB-DITIDA), WITH RECOMMENDATIONS FOR THE PLACING OF CERTAIN NAMES ON THE " OFFICIAL LISTS " By ELLSWORTH C. DOUGHERTY, Ph.D., M.D. {Department of Zoology, University of California, Berkeley, California) (Commission's reference Z.N.(S.)188) Introduction 1. The type species, which is also the only generally recognized species, of Stephanurus Diesing, 1839 — a strongyline genus placed by Chitwood and Chitwood (1937) in a subfamily stephanurinae Railliet, Henry, and Bauche, 1 9 1 9 , of the family SYNGAMiDAELeiper,191 2 — is generally known as Stephanurus dentatus Diesing, 1839. It is the kidney worm of swine {Sus scrofa) and an organism of cosmopolitan distribution and considerable economic importance. Because of its prominence as a parasite of a domestic animal and the resulting close scrutiny it must suffer, it is rather surprising that in recent years the question of its specific name has not received more attention. It is now possible to say that certain facts in its history make apparent that the specific trivial name of Diesing (1839) can be used only if the International Commission on Zoological Nomenclature invokes its plenary powers. A detailed history of earlier papers was given by Tayler (1900) ; and the essential points in the nomenclatorial history have been more recently reviewed in a paper originating from the Imperial Bureau of Agricultural Parasitology, England, and apparently written by B. G. Peters (i.e., B.G.P., 1931), but therein the nomenclatorial issues were not directly faced. 2. An earlier draft of the present paper was first submitted to the Inter-national Commission in 1945. In its original form it dealt with problems, certain of which have subsequently been clarified by action of the International Commission and of the International Congress of Zoology at the historic Paris meetings in July, 1948. The following month (in August, 1948) the author visited Mr. Francis Hemming, Secretary to the International Commission ; and it was at that time agreed between them that, if pertinent matters were still to be raised, the paper should be rewritten in light of decisions taken at the Paris Meetings and resubmitted. I have delayed doing this until the " Ofiicial Record of Proceedings of the International Commission on Zoological Nomen-clature at their Session held in Paris in July, 1948 " could be published. Now that such has been done in Volume 4 of The Bulletin of Zoological Nomenclature, I have reviewed the earlier draft and rewritten it. It is hereby resubmitted. 3. In the original draft a major problem, now essentially solved, dealt with questions of secondary homonymy (see 1950, Bull. zool. Nomencl. 4 : * The classification preferred by the author is to consider Nematoda a Phyhim divided into Classes Phasmidea (including the Order Bhabditida) and Aphasmidea. Bull, zool Nomencl. Vol. 2, Pts. 9/10. August, 1951
On the question of the correct name for the type species of the genus "Stephanurus" Diesing, 1839 (class Nematoda, order Rhabditida), with recommendations for the placing of certain names on the "Official Lists"
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