Eumunididae, Milne-Edwards & Bouvier, 1900

Schnabel, Kareen E. & Ahyong, Shane T., 2010, A new classification of the Chirostyloidea (Crustacea: Decapoda: Anomura), Zootaxa 2687 (1), pp. 56-64 : 58-59

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).

Figures

FIGURE 1. Eumunididae: A, Eumunida australis de Saint Laurent & Macpherson, 1990 (♀, pcl 52 mm, NMNZ Cr.5917); B, Pseudomunida fragilis Haig, 1979 (♀ ovig., pcl 20.5 mm, MNHN-Ga7507).

FIGURE 2. A–F, mandibular dentition, ventral view. G–L, right maxilliped 1 endopod and exopod, anterior view (epipod indicated by arrow). Eumunididae: A, G, Eumunida australis de Saint Laurent & Macpherson, 1990b (♂, pcl 12.9 mm, NMNZ Cr.21765); B, H, Pseudomunida fragilis Haig, 1979 (♀ ovig., pcl 20.5 mm, MNHN-Ga7507). Chirostylidae: C, I, Chirostylus dolichopus Ortmann, 1892 (♂, pcl 2.7 mm, MNHN station LA REUNION, MD32, CP172); D, J, Gastroptychus rogeri Baba, 2000 (♂, pcl 23.2 mm, NIWA 14555); E, K, Uroptychodes epigaster Baba, 2004 (♀, pcl 3.4 mm, NMNZ Cr.21766); F, L, Uroptychus cardus Ahyong & Poore, 2004 (♂, pcl 10.5 mm, NIWA 23086). Scale: A–F, not to scale; G, H, J, L = 1.00 mm; I, K = 0.45 mm.