Paranarthrurella Lang 1971

• Main Author: Anna, Piotr
• Format: Text
• Language: unknown
• Published: Zenodo 2009
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Tanaidacea; Paranarthrurella; Arctic; Pacific; Norway; Seta; Christiania; Bougainville; Gardiner; Arktis*; Kamchatka
• Online Access: https://dx.doi.org/10.5281/zenodo.3511336; https://zenodo.org/record/3511336

Genus Paranarthrurella Lang, 1971 a Tanais Latreille, 1831 (partim.): G.O. Sars, 1877: 347, 370; G.O. Sars, 1882: 50; G.O. Sars, 1896: 33; Sieg, 1980: 11 –12. Cryptocope G.O. Sars, 1882 (partim.): G.O. Sars, 1882: 50 –51; G.O. Sars, 1885: 74 –78; Forsstrand, 1886: 47; Norman, 1899: 340; Zirwas, 1911: 105; Hansen, 1913: 106, 109– 110, pl X; Nierstrasz, 1913: 33; Lang, 1949: 6, 8; Stephensen, 1932: 349; Lang, 1971 b: 403. Leptognathia G.O. Sars, 1882 (partim.): Kudinova-Pasternak, 1965: 75, 88– 91; Belyaev, 1966: 88; Kudinova-Pasternak, 1968: 73; Lang, 1968: 160 –161; Lang, 1971 a: 361 –362; Gardiner, 1975: 225; Lang, 1972: 229 –235; Kudinova- Pasternak, 1981: 115; Sieg, 1983: 317. Strongylura G.O. Sars, 1882 (partim.): Norman & Stebbing, 1886: 110, 133. Paranarthrurella Lang, 197 a 1: Lang, 1971 a: 361, 363, 367; Sieg, 1973: 34 –281; Sieg, 1976: 178; Sieg, 1978: 121. Robustognathia : Kudinova-Pasternak, 1989: 68, 33– 34. Biarticulata Larsen & Shimomura, 2007 (partim): Larsen & Shimomura, 2007: 19; Bird, 2007: 75. Gender: Feminine. Type species: Leptognathia caudata Kudinova-Pasternak, 1965; by original designation (Lang, 1971 a). Species included: Paranarthrurella caudata P. ( = Leptognathia ) dissimilis Lang, 1972; P. ( = Tanais ) voeringi G.O. Sa r s, 1877. Amended diagnosis: Female: antennule with five articles, distal article vestigial. Antenna with six articles. Labrum long and narrow. Mandibular molar rounded distally, with 5–7 short, flat distal setae, incisor large and gently rounded, lacinia mobilis large and widely separated from incisor. Maxillule with eleven spiniform setae distally and numerous simple setae on outer margin; labium strongly setose with poorly-developed outer lobe; maxilliped with narrow endites, bases with small seta distally; endites with pair of simple and pair of short flat setae distally. Epignath distally narrow. Chelipeds usually robust; attached to cephalothorax by sclerite; chela with well calcified ‘crushing margins’. All pereopods of walking type; pereopod- 1 setation strongly reduced; pereopods 2–6 with short and robust setae. Pleopods absent or reduced in female. Uropods biramous, both rami 2 -articled. Male: swimming type; antennule with seven articles; articles 4–6 with numerous aesthetascs; mouthparts reduced; cheliped and pereopods similar to female; pleopod rami elongated with setulated setae distally; uropod endopod with three, exopod with two articles. Remarks: The genus Paranarthrurella has a set of very distinctive characters, especially in the morphology of the mouthparts, which exclude it from any of the families recognized by Larsen and Wilson (2002). The systematic position of Paranarthrurella remains unresolved, and it is proposed that the genus becomes family incertae sedis until there is a better understanding of the systematics of the paratanaoid tanaidomorph genera. Paranarthrurella is most closely related to Armatognathia Kudinova-Pasternak, 1987, sharing with it the specific mouthpart morphology which includes an elongated labrum (e.g. Fig. 2 C), a setose outer margin of the maxillule (Fig. 2 F), and the bizarre shape of the mandibles (Fig. 2 D). The mandible incisor is massive and gently rounded; the lacinia mobilis (on the left mandible only) forms a gentle depression that, together with the incisor, forms a spoon-like structure; the mandibular molar in both genera is large, but gently rounded distally, with short simple or blunt spiniform setae. The maxillipeds have quite narrow endites which are of similar width proximally and distally. A peculiar character in the genus is the projection on the inner margin of the cheliped dactylus, that matches a depression on the inner margin of the fixed finger (e.g. Fig. 3 A). It is difficult to judge the function of the structure without direction observation or at least information about stomach contents. It can be assumed however, that it is used for crushing the food particles (e.g. forminiferan tests). Females studied by us have an antennule of five articles, although the last article is vestigial. This character has often been overlooked in the past, and is so far confirmed for such genera as Collettea Lang, 1973, Robustochelia Kudinova-Pasternak, 1983 and Tanaopsis G.O. Sars, 1896. The family classification of Paranarthrurella remains uncertain, although it cannot be classified to either the Anarthruridae or the Agathotanaidae. The regular structure of uropods and cheliped attachment to the cephalothorax by a sclerite suggest its relationship to some leptognathids or colletteids. More probable however is that this genus, together with Armatognathia, constitute a new family that may yet be confirmed through phylogenetic analysis. : Published as part of Anna, Piotr, 2009, A revision of the genus Paranarthrurella Lang, 1971 a (Crustacea: Tanaidacea), pp. 56-68 in Zootaxa 2238 on pages 57-58, DOI: 10.5281/zenodo.190462 : {"references": ["Lang, K. (1971 a) Taxonomische und phylogenetische Untersuchungen uber die Tanaidaceen. 6. Revision der Gattung Paranarthrura Hansen, 1913, und Aufstellung von zwei neuen Familien, vier neuen Gattungen und zwei neuen Arten. Arkiv for Zoologie, series 2, 23, 361 - 401.", "Latreille, M. (1831) Heteropodes (Heteropoda). Page 403, In: M. Latreille (ed.) Cours d\u00b4Entomologie, ou de l\u00b4Histoire Naturelle des Crustaces, des Arachnides, des Myriapodes et des Insects; a l\u00b4Usage des Eleves de l\u00b4Ecole du Museum d\u00b4Histoire Naturelle. Librairie de Roret, Paris.", "Sars, G. O. (1877) Prodromus descriptionis Crustaceorum et Pycnogonidarum, qvae in Expeditione Norvegica anno 1876 observavit. Archiv for Matematik og Naturvidenskab, 2, 237 - 271.", "Sars, G. O. (1882) Revision af gruppen Chelifera med charakteristik af nye herhen horende arter og slaegter. Archiv for Matematik og Naturvidenskab, 7, 1 - 54.", "Sars, G. O. (1896) An Account of the Crustacea of Norway, 2, 30.", "Sieg, J. (1980) Taxonomische Monographie der Tanaidae Dana 1849 (Crustacea: Tanaidacea). Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft, 537, 1 - 267.", "Sars, G. O. (1885) Crustacea 1. Den norske Nordhavs-Expedition. Christiania, 6, 74.", "Forsstrand, C. (1886) Det Arktiska Hafsomradets Djurgeografiska Begransning med Ledning af Skalkraftornas (Crustacea: Malacostraca) Utbredning. Almqvist & J. Wiksell, Upsala.", "Norman, A. M. (1899) British Isopoda Chelifera. Annals and Magazine of Natural History, Series 7, 3, 317 - 341.", "Zirwas, C. (1911) Die Isopoden den Nordsee. Wissenschaftliche Meeresuntersuchungen, 12, 73 - 118.", "Hansen, H. J. (1913) Crustacea, Malacostraca. II. IV. The Order Tanaidacea. Danish Ingolf Expedition, 3, 1 - 145.", "Nierstrasz, H. F. (1913) Die Isopoden der Siboga-Expedition. I. Isopoda Chelifera. Siboga Expeditie, 32 a, 1 - 56.", "Lang, K. (1949) Contribution to the systematics and synonymics of the Tanaidacea. Arkiv for Zoologie, 42, 1 - 14.", "Stephensen, K. (1932) The Tanaidacea and Amphipoda of the Arctic. Fauna Arctica, 6, 343 - 378.", "Lang, K. (1971 b). Taxonomische und phylogenetische Untersuchungen uber die Tanaidaceen. 7. Revision der Gattung Strongylura G. O. Sars, 1882, nebst Beschreibung einer neuen Art dieser Gattung. Arkiv for Zoologi, 23, 403 - 415 (plate I).", "Kudinova-Pasternak, R. K. (1965) Deep-sea Tanaidacea from the Bougainville Trench of the Pacific. Crustaceana, 8, 75 - 91.", "Belyaev, G. M. (1966) Donnaya Fauna Najbolshih Glubin (Ultraabissali) Mironogo Okeana Izatelstvo \" Nauka \", Moskva 169 pp.", "Kudinova-Pasternak, R. K. (1968) Klescenenosniie osliki (Tanaidacea) Tihii Okean. Biologia Tihogo Okean, 2, 72 - 74.", "Lang, K. (1968) Deep-sea Tanaidacea. Galathea Reports, 9, 23 - 209.", "Gardiner, L. F. (1975) The systematics, postmarsupial development, and ecology of the deep-sea family Neotanaidae (Crustacea: Tanaidacea). Smithsonian Contributions to Zoology, 170, 1 - 265.", "Lang, K. (1972) Bathytanais bathybrotes (Beddard) und Leptognathia dissimilis n. sp. (Tanaidacea). Crustaceana, Supplement 3, 221 - 236.", "Kudinova-Pasternak, R. K. (1981) Tanaidacea (Crustacea, Malcostraca) sobrannye sovetskoj antarkticheskoj ekspeditziej w 1955 - 1958 gg. i svjaz arealov tanaid Juzhnogo Okeana s osobennostiami ih batimetricheckogo raspredelenija. Trudy Instituta Okeanologii, 115, 108 - 125.", "Sieg, J. (1983) Tanaidacea. Part 6. In: Gruner, H. E. and L. B. Holthuis (eds.), Crustaceorum Catalogus. W. Junk, the Hague, pp. 1 - 552.", "Norman, A. M. & Stebbing, T. R. R. (1886) On the Crustacea Isopoda of the ' Lightning', ' Porcupine', and ' Valorous' Expeditions. Transactions of the Zoological Society of London, 12, 77 - 141.", "Sieg, J. (1973) Ein Beitrag zum Naturlichen System der Dikonophora Lang. Dissertation, Christian-Albrecht- Universitat, Kiel, 298 pp.", "Sieg, J. (1976) Zum naturlichen System der Dikonophora Lang (Crustacea, Tanaidacea). Zeitschrift fur Zoologische Systematik und Evolutionsforschung, 14, 177 - 198.", "Sieg, J. (1978) Aufteilung der Anarthruridae Lang in zwei Unterfamilien sowie neubeschreibung von Tanais willemoesi Studer als Typus-Art der Gattung Langitanais Sieg (Tanaidacea). Crustaceana, 35, 119 - 133.", "Kudinova-Pasternak, R. K. (1989) Tanaidacees abyssales (Crustacea, Tanaidacea) des parties nord-est et centrale de l\u00b4Ocean Indien (d\u00b4apres des materiaux de l\u00b4expedition Francaise \" Safari-II \"). 2. Sous-ordre Tanaidomorpha. Zoologicheskij Zhurnal, 68, 27 - 40.", "Larsen, K. & Shimomura, M. (2007) Tanaidacea (Crustacea: Peracarida) from Japan. II. Tanaidomorpha from the East China Sea, the West Pacific Ocean and the Nansei Islands. Zootaxa, 1464, 1 - 43.", "Bird, G. J. (2007) Families Anarthruridae Lang, 1971, Colleteidae Larsen & Wilson, 2002, and Leptognathiidae Sieg, 1976. In: K. Larsen & M. Shimomura (eds.) Tanaidacea (Crustacea: Peracarida) from Japan III. The deep trenches; the Kurile-Kamchatka Trench and Japan Trench. Zootaxa, 1599, pp. 61 - 85.", "Larsen, K. & Wilson, G. D. F. (2002) Tanaidacean phylogeny, the first step: the superfamily Paratanaidoidea. Journal of Zoological Systematics and Evolutionary Research, 40, 205 - 222.", "Kudinova-Pasternak, R. K. (1987) Novye Tanaidacea (Crustacea) iz Madagaskarkoi Kothovyny Indiiskogo Okeana) (Les genres nouveaux des Tanaidacea (Crustacea) du bassin de Madagascar de l\u00b4Ocean Indien). Zoologicheskij Zhurnal, 66, 28 - 36.", "Lang, K. (1973) Taxonomische und phylogenetische Untersuchungen uber die Tanaidaceen (Crustacea). 8. Die Gattungen Leptochelia Dana, Paratanais Dana, Heterotanais G. O. Sars und Nototanais Richardson. Dazu einige Bemerkungen uber die Monokonophora und ein Nachtrag. Zoologica Scripta, 2, 197 - 229.", "Kudinova-Pasternak, R. K. (1983) The abyssal Tanaidacea (Crustacea) of the Iberian and west-European hollows of the Atlantic Ocean. Zoologicheskij Zhurnal, 62, 1170 - 1176."]}