Eumonostilifera

• Main Author: Kajihara, Hiroshi
• Format: Text
• Language: unknown
• Published: Zenodo 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Nemertea; Enopla; Monostilifera; Kamchatka; North Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.4519272; https://zenodo.org/record/4519272

Suborder EUMONOSTILIFERA Morphological circumscription Given by Chernyshev (2011a: 191). Monostiliferans having cerebral organs not extending behind the brain (exceptions include Proamphiporus Chernyshev & Polyakova, 2019), with simple canal, but rarely with forked canal bearing a sac-shaped cavity; mouth and rhynchodaeum merge into rhynchostomodeum, or open into a common atrium; rhynchocoel wall of either two-layered (inner longitudinal and outer circular) or interwoven musculature; myofibrils located in fibrous core of lateral nerve cord. Clade definition Monostiliferans that are more closely related to Amphiporus lactifloreus (Johnston, 1828) than to Cratenemertes amboinensis (Bürger, 1890). Remarks Thollesson & Norenburg (2003: 414) defined Distromatonemertea as “the most inclusive clade comprising all monostiliferous nemertea except Cratenemertea ”. Ambiguity remains in this definition, because Cratenemertea was not clearly defined (see above). In descriptive terms, Distromatonemertea sounds as though it consists only of members with a two-layered rhynchocoel wall, which excludes Plectonemertidae. The name Distromatonemertea in the sense of Thollesson & Norenburg (2003) is thus problematic. Chernyshev (2003a) placed Enopla (= Hoplonemertea) at the rank of subclass and included in it five orders— Pelagica, Reptantia, Cratenemertea, Eumonostilifera, and Bdellomorpha, abandoning Brinkmann’s (1917) Polystilifera and Monostilifera. Chernyshev (2003 a, 2005a) originally regarded Eumonostilifera as not encompassing Malacobdella . Later, Chernyshev (2011a: 191) amended the diagnosis of Eumonostilifera to accommodate Malacobdella . Although Distromatonemertea has nomenclatural precedence over Eumonostilifera, I here adopt the latter due to the taxonomic uncertainty in the former. : Published as part of Kajihara, Hiroshi, 2021, Higher classification of the Monostilifera (Nemertea: Hoplonemertea), pp. 151-199 in Zootaxa 4920 (2) on page 157, DOI: 10.11646/zootaxa.4920.2.1, http://zenodo.org/record/4475126 : {"references": ["Chernyshev, A. V. (2011 a) Comparative Morphology, Systematics and Phylogeny of the Nemerteans. Dalnauka, Vladivostok, 309 pp. [in Russian]", "Chernyshev, A. V. & Polyakova, N. E. (2019) Nemerteans from the deep-sea expedition KuramBio II with descriptions of three new hoplonemerteans from the Kuril-Kamchatka Trench. Progress in Oceanography, 178, 102148. https: // doi. org / 10.1016 / j. pocean. 2019.102148", "Johnston, G. (1828) Contributions to the British fauna. Zoological Journal, 3, 486 - 491. [https: // www. biodiversitylibrary. org / item / 19597 page / 548 / mode / 1 up]", "Burger, O. (1890) Untersuchungen uber die Anatomie und Histologie der Nemertinen nebst Beitragen zur Systematik. Zeitschrift fur wissenschaftliche Zoolgie, 50, 1 - 277. [https: // www. biodiversitylibrary. org / item / 135257 page / 11 / mode / 1 up]", "Thollesson, M. & Norenburg, J. L. (2003) Ribbon worm relationships: a phylogeny of the phylum Nemertea. Proceedings of the Royal Society B, 270, 407 - 415. https: // doi. org / 10.1098 / rspb. 2002.2254", "Chernyshev, A. V. (2003 a) Classification system of the higher taxa of enoplan nemerteans (Nemertea, Enopla). Russian Journal of Marine Biology, 29 (Supplement 1), S 57 - S 65. https: // doi. org / 10.1023 / B: RUMB. 0000011717.06390.30", "Brinkmann, A. (1917) Pelagic nemerteans from the \" Michael Sars \" North Atlantic Deep-Sea Expedition 1910. Report on the Scientific Results of the \" Michael Sars \" North Atlantic Deep-Sea Expedition 1910, 3 (2), 1 - 18. [https: // www. biodiversitylibrary. org / item / 120117 page / 19 / mode / 1 up]", "Chernyshev, A. V. (2005 a) System of families of enoplan nemerteans of the order Eumonostilifera (Nemertea: Enopla). Russian Journal of Marine Biology, 31 (Supplement 1), S 27 - S 33. https: // doi. org / 10.1007 / s 11179 - 006 - 0012 - 6"]}