Glyphanostomum Levinsen 1884

Glyphanostomum Levinsen, 1884 Type species: Samytha pallescens Théel, 1879 Generic diagnosis (emended). Prostomium without glandular ridges. Buccal tentacles smooth. Three pairs of cirriform branchiae. Segment II without chaetae. Thorax with 14 chaetigers and 11 uncinigers. Modified thoracic uncinig...

Full description

Bibliographic Details
Main Authors: Reuscher, Michael G., Fiege, Dieter
Format: Text
Language:unknown
Published: Zenodo 2016
Subjects:
Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Terebellida
Ampharetidae
Glyphanostomum
Nouvelle-Zemble
Online Access:https://dx.doi.org/10.5281/zenodo.6067559
https://zenodo.org/record/6067559
Description
Summary:Glyphanostomum Levinsen, 1884 Type species: Samytha pallescens Théel, 1879 Generic diagnosis (emended). Prostomium without glandular ridges. Buccal tentacles smooth. Three pairs of cirriform branchiae. Segment II without chaetae. Thorax with 14 chaetigers and 11 uncinigers. Modified thoracic unciniger 8 with elevated notopodia and dorsal glandular ridge absent or present. Two intermediate uncinigers. Abdominal rudimentary notopodia absent. Remarks. The generic diagnosis had to be emended to accommodate the newly described species, which has a modified segment in the posterior thorax, reminiscent of the modification in the genera Anobothrus and Zatsepinia Jirkov, 1986. We decided against the erection of a new genus because all morphological characters, with the exception of the modified segment, agree with the generic diagnosis of Glyphanostomum . In contrast, Anobothrus , which is distinguished by a similar modification from Ampharete has additional morphological differences, most notably smooth, rather than pinnate, buccal tentacles. : Published as part of Reuscher, Michael G. & Fiege, Dieter, 2016, Ampharetidae (Annelida: Polychaeta) from cold seeps off Pakistan and hydrothermal vents off Taiwan, with the description of three new species, pp. 197-208 in Zootaxa 4139 (2) on page 202, DOI: 10.11646/zootaxa.4139.2.4, http://zenodo.org/record/262112 : {"references": ["Levinsen, G. M. R. (1884) Systematisk-geografisk Oversigt over de nordiske Annulata, Gephyrea, Chaetognathi og Balanoglossi. Videnskabelige Meddelelser fra den naturhistoriske Forening i KjObenhavn, 1883, 92 - 350.", "Theel, H. J. (1879) Les Annelides Polychetes des mers de la Nouvelle-Zemble. Kungliga Svenska Vetenskaps-Akademiens Handlingar, 16 (3), 1 - 75.", "Jirkov, I. A. (1986) [Zatsepinia rittichae gen. et sp. n. (Polychaeta, Ampharetidae) from the Norwegian and Barents Seas]. Zoologicheskii Zhurnal, 65 (2), 289 - 290. [in Russian]"]}

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