Work

Mediomastus Hartman 1944

Year: 2024

Type: other

Abstract: Genus Mediomastus Hartman, 1944 Type species: Mediomastus californiensis Hartman, 1944, by original designation. Diagnosis (after Warren et al. 1994). Prostomium conical, palpode present; eyespots present or absent, when present in multiple spots. Peristomium clearly distinct from prostomium; achaetous segment absent. First chaetiger biramous. Nine to eleven thoracic chaetigers but usually ten. Chaetigers 1–4 with only capillaries and remaining thoracic chaetigers with long-shafted hooded hooks. Sometimes paddle-like chaetae may be present in thorax and sometimes capillary chaetae may be present in notopodia of posterior segments. Thorax not clearly demarcated from abdomen. Abdominal segments with only short-shafted hooded hooks. Branchiae absent. Genital pores in three pairs from chaetigers 7/8 or 8/9 but difficult to observe. Lateral organs present on thorax and inconspicuous in abdomen. Pygidium with ventral caudal cirrus.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.13627222

Authors: Magalhães, Wagner F., Lavesque, Nicolas, Lamarque, Bastien

Institutions: Universidade Federal da Bahia, Centre National de la Recherche Scientifique, Environnements et Paléoenvironnements Océaniques et Continentaux, Institut Polytechnique de Bordeaux

Language: English

Topic: Marine Biology and Ecology Research

Subfield: Oceanography

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W6911785222

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