REVISION Y FILOGENIA DE LOS GENEROS FERRIERIA Y ACANTHOCETO (ARANEAE: ANYPHAENIDAE, AMAUROBIOIDINAE) Martin J. Ramirez^ ABSTRACT REVISION AND PHYLOGENY OF THE Gm^ERAFERRIERIA AND ACANTHOCETO (ARANEAE: ANYPHAENIDAE, AMAUROBIOIDINAE). The genera Ferrieria TuUgren and Acanthoceto Mello-Leitao are revised. Acanthoceto is diagnosed by the male abdominal Prolongation above the anal tubercle. Seven South American species are included: Gayenna cinerea Tullgren, Clubiona acupicta Nicolet and Tomopisthes septentrionalis Berland are transferred to Acanthoceto; four new species are described, A. riogrande, A. pichi, A. marinus and A. ladormida. Acanthoceto bryantae Caporiacco is transferred to Josa. Gayenna marginata Keyserling and Acanthoceto adelae Mello-Lei-tão are newly synonymized with Acanthoceto acupictus. Ferrieria is diagnosed by the large macrosetae on fore legs, combined with wrapped copulatory ducts and a short spine-like palpal tibial retrolateral apophysis. Includes only Ferrieria echinata Tullgren, from South Chile and adjacent Argentina. Terupis Simon is newly synonymized with Ferrieria, and Terupis bicolor Simon with Ferrieria echinata. A cladistic analysis of all Acanthoceto and Ferrieria species, plus eleven genera of Amaurobioidinae, Anyphaeninae and Malenelhnae is made for 39 informative characters. Ferrieria is proposed to be the sister group of Acanthoceto, and relationships with other genera of Amaurobioidinae are discussed. KEYWORDS. Ferrieria, Acanthoceto, Anyphaenidae, Neotropical, Ciadistics. INTRODUCCION Los géneros Ferrieria Tullgren y Acanthoceto Mello-Leitao tienen una historia taxonómica en común. Los autores de las descripciones originales no percibieron el conspícuo espiráculo traqueal separado de las hileras, clásicamente utilizado 1 . Lab. Artrópodos, Facultad de Cs. Exactas y Naturales, Universidad de Buenos Aires, Departamento de Biologia, Pabellón II Ciudad Universitaria, (1428). (Becario de iniciación). Iheringia, Sér. Zool., Porto Alegre, (82): 173-203, 11 abr. 1997
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