Ianiropsis Sars 1897
Creators
Description
Ianiropsis Sars, 1897
Ianiropsis G.O. Sars, 1897: 102.— Menzies, 1952: 134; 1962: 78; Kussakin, 1962: 40; 1988: 88; Wilson & Wägele, 1994: 702 –703.
Janiropsis. — Richardson, 1905: 454; Gurjanova, 1936: 44.
Type species. Janira breviremis Sars, 1883, by subsequent designation.
Species included. I. alanmillari sp. nov., I. analoga Menzies, 1952; I. breviremis (Sars, 1883); I. derjugini Gurjanova, 1933; I. epilittoralis Menzies, 1952; I. kincaidi Richardson, 1904; I. koreaensis Jang & Kwon, 1990; I. kussakini Carvacho, 1982; I. longiantennata Thielemann, 1910; I. longipes Sivertsen & Holthuis, 1980; I. magnocula Menzies, 1952; I. minuta Menzies, 1952; I. montereyensis Menzies, 1952; I. neglecta (Chilton, 1909); I. notoensis Nunomura, 1985; I. pallidocula Kussakin, 1962; I. palpalis Barnard, 1914; I. perplexus Menzies, 1962; I. picta Kussakin & Mezhov, 1979; I. punctulata Kussakin & Mezhov, 1979; I. serricaudis Gurjanova, 1936; I. setifera Gurjanova, 1950; I. tridens Menzies, 1952.
Not Ianiropsis varians Winkler & Brandt, 1993 (= Iathrippa varians (Winkler & Brandt, 1993), new combination).
Diagnosis. Head frontal margin width between antennulae near basal width of antennae (except I. setifera). Eyes dorsolateral, large, posterior margin with distinct gap between pereonite 1. Maxilliped endite with 2 receptaculi. In some species the maxilliped palp and/or the pereopod I is sexually dimorphic. Maxilliped palp of adult (terminal) male longer than antennule, projecting anteriorly, visible on head in dorsal view. Pereopod I of adult (terminal) male basis-merus elongate, distinctly longer than those on posterior pereopods; carpus setose, ventral margin proximal to palm approximately linear, slightly sinuous; propodus ventral margin without spines; dactylus well developed. Pereopods II–VII not sexually dimorphic; coxa anterolateral margin rounded (unknown in several species). Pleopod I of adult male lateral lobe distal margin absent (or nearly so); medial lobe without distinct indentation at inner margin of lateral lobe. Pleopod II of adult male stylet curving laterally with no inflections. Pleopod III endopod with 3 (rarely 2) plumose setae, exopod with 2 articles, distally rounded or pointed with 1–3 simple setae. Uropods rami crossectional shape oval.
Distribution. Cosmopolitan, mostly temperate to cold temperate coastal waters.
Remarks. Ianiropsis species have several characteristics that ease their identification, despite the general similarities of most juveniles and females in species of the core taxa of the janirids. Key among these are the fairly consistent shape of the male pleopod I distal tip, and the elongate pereopod I of the males. These characters exclude the species Ianiropsis varians Winkler & Brandt, 1993 from Ianiropsis. We therefore propose a new combination, Iathrippa varians (Winkler & Brandt, 1993). Other characters that support this new combination are as follows. All species of Ianiropsis, including both sexes, have a narrow pleopod III exopod, which is distinctly different from the broad exopod found in Iathrippa. The broad exopod of Iathrippa is related to the partially opercular condition of this pleopod (Wilson, 1987). The Ianiropsis male pleopod II protopod has a distinct extension posterior to the exopod, while in Iathrippa it is abbreviated, owing to its nonopercular form. The terminal margin of the male pleopod I is consistent across the species within each genus, so that the projecting medial lobes of the species I. varians clearly places it with Iathrippa. This species was described without the characteristic rostrum, but our experience with Australian Iathrippa suggests that the rostrum can be variable between species in the genus Iathrippa. The rostrum can also be thin and hard to see in some species. Regarding more general body form characters, Iathrippa species have a broad body and eyes that project substantially from the head as in I. varians, whereas Ianiropsis species have narrow bodies and eyes that are more dorsal in position, with some separation from the head lateral margin.
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Linked records
Additional details
Identifiers
Related works
- Is part of
- Journal article: 10.5281/zenodo.198196 (DOI)
- Journal article: http://publication.plazi.org/id/73626D53D0598E76FF9DFFC8FFBAFFE3 (URL)
- Is source of
- https://sibils.text-analytics.ch/search/collections/plazi/8F5B152BD0548E78FF0AFAAAFA93FBEF (URL)
Biodiversity
- Family
- Janiridae
- Genus
- Ianiropsis
- Kingdom
- Animalia
- Order
- Isopoda
- Phylum
- Arthropoda
- Scientific name authorship
- Sars
- Taxon rank
- genus
- Taxonomic concept label
- Ianiropsis Sars, 1897 sec. Doti & Wilson, 2010
References
- Sars, G. O. (1897) Isopoda. Part V, VI. Idoteidae, Arcturidae, Asellidae, Ianiridae, Munnidae. An account of the Crustacea of Norway with short descriptions and figures of all the species. Vol. 2. (Bergen Museum: Bergen, Norway).
- Menzies, R. J. (1952) Some marine asellote isopods from northern California, with descriptions of nine new species. Proceedings of the United States National Museum, 102, 117 - 159.
- Kussakin, O. G. (1962) On the fauna of Janiridae (Isopoda, Asellota) from the Seas of the USSR. Trudy Zoologicheskogo Instituta Akademii Nauk SSSR, 30, 17 - 65. (In Russian).
- Wilson, G. D. F. & Wagele, J. - W. (1994) A systematic review of the family Janiridae (Crustacea: Isopoda: Asellota). Invertebrate Taxonomy, 8, 683 - 747.
- Richardson, H. (1905) A Monograph on the isopods of North America. Bulletin of the United States National Museum, 54, 1 - 717.
- Gurjanova, E. F. (1936) Isopods of the Eastern Seas. In: Crustacea. Vol. 7, Chapt. 3, pp. 280. In Series Fauna of the USSR, vol. 6. Academy of Sciences of the USSR, Leningrad. (In Russian).
- Sars, G. O. (1883) Oversigt af Norges Crustaceer med forelubige Bemaerkninger over de nye eller mindre bekjendte Arter. I. (Podophthalmata-Cumacea-Isopoda-Amphipoda). Forhandlinger I Videnskabs-Selskabet I Kristiania, 1882, 1 - 124.
- Gurjanova, E. F. (1933) Die marinen Isopoden der Arktis. In: Romer, F. & Schaudinn, F. (Eds.) Fauna Arctica. Vol. 6. G. Fischer Verlag: Jena, pp. 392 - 472. (In German).
- Richardson, H. (1904) Isopod crustaceans of the northwest coast of North America. Harriman Alaska Expedition. Crustacea, 10, 213 - 230.
- Jang, I. K. & Kwon, D. H. (1990) Ianiropsis (Isopoda, Asellota, Ianiridae) from Korea, with description of a new species. The Korean Journal of Systematic Zoology, 6, 193 - 208.
- Carvacho, A. (1982) Isopodos litorales de la costa de Concepcion Chile central. Studies on Neotropical Fauna and Environment, 17, 195 - 207.
- Thielemann, M. (1910) Beitrage zur Kenntnis der Isopodenfauna Ostasiens. In: Dolfein, F. (Ed.) Beitrage zur naturgeschichte Ostasiens. Abhandlungen der mathematique-physique Klasse der K. Bayer Akademie der Wissenschaften, 2, (supplement 3), 1 - 109.
- Sivertsen, E. & Holthuis, L. B. (1980) The marine isopod Crustacea of the Tristan da Cunha Archipelago. Resultats of the Norwegian Scientific Expedition to Tristan da Cunha 1937 - 1938. Gunneira, 35, 1 - 128.
- Chilton, C. (1909) The Crustacea of the Subantarctic Islands of New Zealand. In: C. Chilton (Ed.), The Subantarctic Islands of New Zealand, Wellington. Philosophical Institute of Canterbury, Christchurch; John McKay, Government Printer, Wellington, pp. 601 - 671.
- Nunomura, N. (1985) Marine isopod crustaceans in the coast of Toyama Bay. Memoirs of the Natural Science Museum, Tokyo, 18, 121 - 139.
- Barnard, K. H. (1914) Contributions to the crustacean fauna of South Africa. 3. Additions to the marine Isopoda with notes on some previously incompletely known species. Annals of the South African Museum, 10, 325 - 442.
- Menzies, R. J. (1962) The zoogeography, ecology and systematics of the Chilean marine isopods. Reports of the Lund University Chile Expedition 1948 - 49. No. 2. Lund Universitets Arrskrifter, 57 (11), 1 - 162.
- Kussakin O. G. & Mezhov, B. V. (1979) Isopoda Crustacea of the sublittoral and the upper bathyal zone of the Kurile Islands. In: Kussakin, O. G. (Ed.). Biology of the Shelf of the Kurile Islands. Academy of Sciences, USSR, Far East Science Center, Institute of Marine Biology, Moscow, pp 125 - 199. (In Russian).
- Gurjanova, E. F. (1950) On the fauna of Isopoda from the Pacific Ocean. 5. Isopoda collected by the Kamchatka Marine Station of the State Hydrological Institute. In: Exploration of the Far-Eastern Seas of the USSR. Vol. 2, pp. 281 - 292. Academy of Sciences of the USSR, Leningrad. (In Russian).
- Winkler, H. & Brandt, A. (1993) Janiridae (Crustacea, Asellota) from the Southern Hemisphere: Ianiropsis varians sp. n. and redescriptions of five little-known species. Zoologica Scripta, 22 (4), 387 - 423.
- Wilson, G. D. F. (1987) The road to the Janiroidea: Comparative morphology and evolution of the asellote isopod crustaceans. Zeitschrift fuer Zoologische Systematik und Evolutionsforschung, 25, 257 - 280.