Ota Yuzo
Graduate School of Biosphere Science, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima City, Hiroshima 739-8528, Japan.; Email:
Zootaxa. 2013 Nov 18;3737:33-56. doi: 10.11646/zootaxa.3737.1.3.
Five gnathiid species from Japan are redescribed based on14 holotypes, their paratypes, topotypes, and new materials. Observations of these specimens revealed that Caecognathia kikuchii (Nunomura, 1992) should be transferred to genus Elaphognathia and Caecognathia nasuta (Nunomura, 1992) to genus Gnathia. Furthermore, Caecognathia amakusaensis Nunomura, 1992, C. saikaiensis Nunomura, 1992, Gnathia azumai Nunomura, 2012a, G. quadricephala Nunomura, 2012a, and G. recticornata Nunomura, 2012a are considered to be junior synonyms of E. kikuchii. Gnathia hirayamai Nunomura, 1992, G. nagasakiensis Nunomura, 2012a, G. shijikiensis Nunomura, 2012a, and G. brevicephala Nunomura, 2012a are considered to be junior synonyms of G. nasuta. Moreover, Gnathia sanrikuensis Nunomura, 1998 and G. mutsuensis Nunomura, 2004 are redescribed. Gnathia bungoensis Nunomura, 1982 is not completely redescribed because the key characteristics were lacking. The geographical records of these species are provided.
基于14个正模标本、其副模标本、地模标本和新材料，对来自日本的5种寄生桡足类物种进行了重新描述。对这些标本的观察表明，菊池盲颚虱（Caecognathia kikuchii）（Nunomura，1992）应转移至盲颚虱属（Elaphognathia），长鼻盲颚虱（Caecognathia nasuta）（Nunomura，1992）应转移至颚虱属（Gnathia）。此外，天草盲颚虱（Caecognathia amakusaensis）Nunomura，1992、佐贺盲颚虱（C. saikaiensis）Nunomura，1992、东云颚虱（Gnathia azumai）Nunomura，2012a、四头颚虱（G. quadricephala）Nunomura，2012a和直角颚虱（G. recticornata）Nunomura，2012a被认为是菊池盲颚虱的次异名。平山大颚虱（Gnathia hirayamai）Nunomura，1992、长崎颚虱（G. nagasakiensis）Nunomura，2012a、志筑颚虱（G. shijikiensis）Nunomura，2012a和短头颚虱（G. brevicephala）Nunomura，2012a被认为是长鼻颚虱的次异名。此外，对三陆颚虱（Gnathia sanrikuensis）Nunomura，1998和陆奥颚虱（G. mutsuensis）Nunomura，2004进行了重新描述。由于缺乏关键特征，未能对1982年发现的文乡颚虱（Gnathia bungoensis）Nunomura进行完整的重新描述。文中还提供了这些物种的地理记录。
