A new classification of the Chirostyloidea (Crustacea: Decapoda: Anomura) Author Schnabel, Kareen E. National Institute of Water and Atmospheric Research, Private Bag 14901, Kilbirnie, Wellington, New Zealand. Author Ahyong, Shane T. Australian Museum, 6 College Street, Sydney, NSW 2010 Australia. E-mail: shane. ahyong @ austmus. gov. au text Zootaxa 2010 2010-11-25 2687 1 56 64 https://biotaxa.org/Zootaxa/article/view/zootaxa.2687.1.4 journal article 10.11646/zootaxa.2687.1.4 1175-5326 5301281 Eumunididae A. Milne Edwards & Bouvier, 1900, stat. nov. ( Fig. 1 , 2A, B, G, H ) Eumunidiens A. Milne-Edwards & Bouvier, 1894: 299 , 308, 312. — Bouvier, 1896: 312 . — A. Milne-Edwards & Bouvier, 1897: 8 , 116 [vernacular name, unavailable]. Eumunidae A. Milne-Edwards & Bouvier, 1900: 364 . Diagnosis. Carapace cordiform, elongate, with transverse striae; posterolateral margin entire, not excavated; rostrum spiniform, flanked by mesial and usually also lateral supraocular spines; lateral supraocular spine well developed ( Eumunida ), minute or obsolete ( Pseudomunida ). Cervical groove distinct. Basal article of ocular peduncle obscured in dorsal view by rostral and supraocular spines. Anterolateral margin of abdominal somite 2 with prominent anterolaterally directed spine. Sternite 3 anterior margin transversely sinuous or irregular, not strongly produced anteriorly. Eyes well developed. Basal antennular article unarmed. Antennal peduncle consisting of 5 articles; acicle present. Mandibular cutting edge calcified, tridentate, with tooth at either end and single median tooth. Maxilliped 1 with well-developed epipod; exopod flagellum annulated in distal portion. Maxilliped 3 to pereopod 4 each with 2 arthrobranchs (vestigial on maxilliped 3). Pereopod 5 with 1 arthrobranch only. Pereopods 2–4 with pleurobranch. Male pleopod 1 absent. Male pleopod 2 vestigial or absent. Male pleopods 3–5 present or absent. Type genus. Eumunida Smith, 1883 , by monotypy. Composition. Eumunida Smith, 1883 , Pseudomunida Haig, 1979 . Remarks. The Eumunidiens group of A. Milne-Edwards & Bouvier, 1894 , was used in the vernacular sense and as such is an informal name and not available under the International Code of Zoological Nomenclature (see Ng et al. 2008 for discussion of vernacular names as used by A. Milne-Edwards and Bouvier). However, A. Milne-Edwards & Bouvier (1900) , regarding Eumunida as belonging to a Tribe within the Diptycinae, used the Latinized form, Eumunidae, and thus validated the name. Eumunidae has not since been used. In now recognising a separate family, Eumunididae , for Eumunida and Pseudomunida , we attribute authorship to A. Milne-Edwards & Bouvier (1900) .