Agathotanais Hansen 1913
Creators
- 1. Faculty of Science, Hokkaido University, N 10 W 8, Sapporo 060 - 0810, Japan E-mail: kakui @ mail. sci. hokudai. ac. jp & Corresponding author
- 2. Misaki Marine Biological Station, Graduate School of Science, University of Tokyo, 1024 Miura 238 - 0225, Japan
Description
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.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Agathotanaidae
- Genus
- Agathotanais
- Kingdom
- Animalia
- Order
- Tanaidacea
- Phylum
- Arthropoda
- Scientific name authorship
- Hansen
- Taxon rank
- genus
- Taxonomic concept label
- Agathotanais Hansen, 1913 sec. Kakui & Kohtsuka, 2015
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.