Agathotanais Hansen 1913

• Main Authors: Kakui, Keiichi, Kohtsuka, Hisanori
• Format: Text
• Language: unknown
• Published: Zenodo 2015
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Tanaidacea; Agathotanaidae; Agathotanais; Elephant Island; Seta
• Online Access: https://dx.doi.org/10.5281/zenodo.4584948; https://zenodo.org/record/4584948

Key to the species of Agathotanais (females) 1. Antenna with two articles.................................................................................................. A. manganicus Larsen, 1999 – Antenna with one article.................................................. 2 2. Uropod with one articulation between basal article and tip......................................................................................... 3 – Uropod without articulations between basal article and tip......................................................................................... 4 3. Length/width of pereonites 3 and 4 about 1.50; pleonites as wide as pereonite 6............................... A. ghilarovi – Length/width of pereonites 3 and 4 almost 1.00; pleonites narrower than pereonite 6..... A. misakiensis sp. nov. 4. Fixed finger with two ventral simple setae; carpus of pereopods 1–3 lacking dorsodistal seta; pleonites narrower than pereonite 6............... A. ahyongi Larsen, 1999 – Fixed finger without ventral seta; carpus of pereopods 1 and 3 (no data for pereopod 2) with one dorsodistal seta; pleonites as wide as pereonite 6......... A. splendidus – Fixed finger with one ventral simple seta; carpus of pereopods 1–3 with one dorsodistal seta; pleonites narrower than pereonite 6...................................................... 5 5. Dorsodistal simple seta on carpus of pereopod 2 long (longer than two-thirds of propodus length)................. 6 – Dorsodistal simple seta on carpus of pereopod 2 short (shorter than two-thirds of propodus length)............... 8 6. Body stout (BL/CW 5.30); cephalothorax length equal to CW...................... A. brevis Kudinova-Pasternak, 1990 – Body narrow (BL/CW more than 6.50); cephalothorax length longer than CW..................................................... 7 7. Pereonite 3 shorter than wide, pereonite 4 longer than wide (length/width 0.90 and 1.10, respectively); dactylus of pereopods 1–3 naked................................. A. ingolfi – Pereonites 3 and 4 longer than wide (length/width 1.15 and 1.30, respectively); dactylus of pereopods 1–3 with one simple seta............................... A. hanseni Lang, 1971 8. Carpus and propodus of pereopods 4–6 with three and two distal spiniform setae, respectively........... A. hadalis – Carpus and propodus of pereopods 4–6 with one and three distal spiniform setae, respectively........................ 9 9. Pleonites narrow (pleonite width 0.75 times pereonite-6 width and 0.65 times CW); basis of pereopods 1–6 without dorsal small spines; carpus and propodus of pereopods 4–6 with ventral small spines................................................................................................ A. spinipoda – Pleonites very narrow (pleonite width 0.65 times pereonite-6 width and 0.45 times CW); basis of pereopods 1–6 with dorsal small spines; carpus and propodus of pereopods 4–6 without ventral small spines............................................................................... A. toyoshioae sp. nov. : Published as part of Kakui, Keiichi & Kohtsuka, Hisanori, 2015, Two New Shallow-water Species of Agathotanais (Crustacea: Tanaidacea) from Japan, pp. 45-58 in Species Diversity 20 (1) on pages 55-57, DOI: 10.12782/sd.20.1.045, http://zenodo.org/record/4584979 : {"references": ["Kudinova-Pasternak, R. K. 1990. Tanaidacea (Crustacea, Malacostraca) of the southeastern part of Atlantic Ocean and the region to the north off Mordvinov (Elephant) Island. Trudy Instituta Okeanologii 126: 90 - 107. [in Russian with English summary]", "Lang, K. 1971. Die Gattungen Agathotanais Hansen und Paragathotanais n. gen. (Tanaidacea). Crustaceana 21: 57 - 71."]}