Metharpinia Schellenberg, 1931

(SOSA), Senckenberg Ocean Species Alliance, Andrade, Luiz F., Boyko, Christopher B., Brandt, Angelika, Buge, Barbara, Dávila Jiménez, Yasmín, Henseler, Mats, Hernández Alcántara, Pablo, Jóźwiak, Piotr, Knauber, Henry, Marcondes Machado, Fabrizio, Martínez-Muñoz, Carlos A., Momtazi, Farzaneh, Nakadera, Yumi, Qiu, Jian-Wen, Riehl, Torben, Rouse, Greg W., Sigwart, Julia D., Sirenko, Boris, Souza-Filho, Jesser F., Steger, Jan, Stępień, Anna, Tilic, Ekin, Trautwein, Bianca, Vončina, Katarzyna, Williams, Jason D. & Zhang, Junlong, 2025, Ocean Species Discoveries 13 – 27 — Taxonomic contributions to the diversity of Polychaeta, Mollusca and Crustacea, Biodiversity Data Journal 13, pp. e 160349-e 160349 : e160349-

Metharpinia Schellenberg, 1931

Type species: Metharpinia longirostris Schellenberg, 1931 (type by subsequent designation).

Composition: Eleven valid species. Metharpinia coronadoi J. L. Barnard, 1980 , Metharpinia dentiurosoma Alonso de Pina, 2003 , Metharpinia floridana (Shoemaker, 1933) , Metharpinia grandirama Alonso de Pina, 2003 , Metharpinia iado Alonso de Pina, 2003 , Metharpinia jonesi (J. L. Barnard, 1963) , Metharpinia longirostris Schellenberg, 1931 , Metharpinia oripacifica J. L. Barnard, 1980 , Metharpinia protuberantis Alonso de Pina, 2001 , Metharpinia taylorae Andrade, Johnsson & Senna, 2015 and Metharpinia hirsuta Souza-Filho & Andrade , sp. nov.

Diagnosis

Rostrum constricted. Eyes present. Antenna 1 article 2 elongate or of medium length, ventral setae proximally placed. Antenna 2 article 1 not ensiform, facial stout setae on article 4 in two or more rows, article 5 ordinary in size. Right mandibular incisor with 2–3 teeth; molar not triturative, with four or more splayed stout setae; palpar hump small, apex of palp article 3 oblique. Maxilla 1 inner plate with 3–4 setae, palp 2 - articulate. Maxilliped ordinary, apex of palp article 3 weakly protuberant, article 4 elongate, apical nail distinct, partially fused. Gnathopods 1–2 ordinary, small, similar; carpus with ordinary length to elongate, free, without eusirid attachment; propodus ordinary, ovatorectangular, poorly setose anteriorly; palm acute. Pereopods 3–4 carpus with posteroproximal setae; propodus with stout facial setae. Pereopod 5–6 basis, merus and carpus broad. Pereopod 7 ischium and dactylus ordinary. Epimeral plate 3 ordinary, bearing four or more long setae. Uropods 1–2, one or more rami with subapical stout setae or nails. Uropod 3 at least one of rami longer than peduncle; outer ramus 2 - articulate, article 2 with 2–3 apical setae. Diagnosis amended from Andrade and Senna (2020).