Notomastus

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Wiklund H, Neal L, Glover A, Drennan R, Muriel Rabone, Dahlgren T (2019) Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Annelida: Capitellidae, Opheliidae, Scalibregmatidae, and Travisiidae. ZooKeys 883 : 1–82, doi. Versioned wiki page: 2019-10-28, version 180268, https://species-id.net/w/index.php?title=Notomastus&oldid=180268 , contributors (alphabetical order): Pensoft Publishers.

Citation formats to copy and paste

BibTeX:

@article{Wiklund2019ZooKeys883,
author = {Wiklund, Helena AND Neal, Lenka AND Glover, Adrian G. AND Drennan, Regan AND Muriel Rabone, AND Dahlgren, Thomas G.},
journal = {ZooKeys},
publisher = {Pensoft Publishers},
title = {Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Annelida: Capitellidae, Opheliidae, Scalibregmatidae, and Travisiidae},
year = {2019},
volume = {883},
issue = {},
pages = {1--82},
doi = {10.3897/zookeys.883.36193},
url = {https://zookeys.pensoft.net/articles.php?id=36193},
note = {Versioned wiki page: 2019-10-28, version 180268, https://species-id.net/w/index.php?title=Notomastus&oldid=180268 , contributors (alphabetical order): Pensoft Publishers.}

}

RIS/ Endnote:

TY - JOUR
T1 - Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Annelida: Capitellidae, Opheliidae, Scalibregmatidae, and Travisiidae
A1 - Wiklund H
A1 - Neal L
A1 - Glover A
A1 - Drennan R
A1 - Muriel Rabone
A1 - Dahlgren T
Y1 - 2019
JF - ZooKeys
JA -
VL - 883
IS -
UR - http://dx.doi.org/10.3897/zookeys.883.36193
SP - 1
EP - 82
PB - Pensoft Publishers
M1 - Versioned wiki page: 2019-10-28, version 180268, https://species-id.net/w/index.php?title=Notomastus&oldid=180268 , contributors (alphabetical order): Pensoft Publishers.

M3 - doi:10.3897/zookeys.883.36193

Wikipedia/ Citizendium:

<ref name="Wiklund2019ZooKeys883">{{Citation
| author = Wiklund H, Neal L, Glover A, Drennan R, Muriel Rabone, Dahlgren T
| title = Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Annelida: Capitellidae, Opheliidae, Scalibregmatidae, and Travisiidae
| journal = ZooKeys
| year = 2019
| volume = 883
| issue =
| pages = 1--82
| pmid =
| publisher = Pensoft Publishers
| doi = 10.3897/zookeys.883.36193
| url = https://zookeys.pensoft.net/articles.php?id=36193
| pmc =
| accessdate = 2019-12-10

}} Versioned wiki page: 2019-10-28, version 180268, https://species-id.net/w/index.php?title=Notomastus&oldid=180268 , contributors (alphabetical order): Pensoft Publishers.</ref>

See also the citation download page at the journal.


Taxonavigation

Ordo: Capitellida
Familia: Capitellidae

Name

Notomastus sp. (NHM_162)Wikispecies linkPensoft Profile

Material examined

NHM_162 NHMUK ANEA 2019.7100, coll. 13 Oct. 2013, 13°57.794N, 116°34.093W, 4084 m http://data.nhm.ac.uk/object/f34e2921-7b6d-4c14-b217-690d9315f073; NHM_915B NHMUK ANEA 2019.7101, coll. 23 Feb. 2015, 12°34.28N, 116°36.63W, 4198 m http://data.nhm.ac.uk/object/98291a2a-c89a-4f62-bde5-91171368c749; NHM_1025D NHMUK ANEA 2019.7102, coll. 24 Feb. 2015, 12°08.02N, 117°17.52W, 4122 m http://data.nhm.ac.uk/object/3e34e783-a51b-4a84-bc2e-6a19bac82b4e; NHM_1200 NHMUK ANEA 2019.7103 coll. 27 Feb. 2015, 12°00.567N, 117°10.687W, 4144 m http://data.nhm.ac.uk/object/2612dd53-cce5-47b9-aeed-c321bda6c3d8; NHM_1948J NHMUK ANEA 2019.7104, coll. 13 Mar. 2015, 12°02.49N, 117°13.03W, 4094 m http://data.nhm.ac.uk/object/24374a21-17b6-4de5-8436-18c160aa5c8d.

Description

All specimens short anterior fragments, posteriorly incomplete with thorax only or thorax and 2–5 abdominal segments only. Small species, 2–4 mm long and 0.3–0.8 mm wide for 11–16 chaetigers. Preserved specimens creamy white in ethanol; live specimens white to light brown semi-opaque/translucent. Epithelium of peristomium and first two chaetigers smooth or at best weakly annulated, on chaetigers 3–11 epithelium tessellated, distinctly bi-annulated (Fig. 3A–D). Prostomium low, rounded mound (Fig. 3D). Eyespots not observed. Nuchal organs inconspicuous. Peristomium as a broad, non-tessellated, achateous ring.
Thorax with 11 chaetigers, first with notochaetae only. All thoracic chaetae long, slender, bilimbate capillaries (Fig. 3G). Genital pores and lateral organs not observed under light microscopy. Transition between thorax and abdomen marked abruptly by the segment size, neuropodia development and chaetal type.
Abdominal segments with hooded hooks only in both rami. Noto- and neuropodia free laterally, notopodia widely separated dorsally. Abdominal notopodia coalesce into lobe, which protrudes from dorsum (Fig. 3E). Superior edges of the neuropodia taper to broadly rounded lobes (Fig. 3F, G). All abdominal chaetae hooded hooks, about 45 per ramus (Fig. 3H). All hooded hooks similar in shape on noto- and neuropodia; hooks with long shaft, with swelling at mid-point; with a main fang and rows of small teeth. The rest of the body unknown.

Methyl green stain

Anterior fragment with 13 chaetigers staining more or less uniformly; more pronounced in chaetigers 6–11 (Fig. 3I).

Genetic data

GenBank MN217417-MN217421 for 16S, MN217497 for 18S. COI was unsuccessful for this species, no identical matches on GenBank for 16S or 18S. In our phylogenetic tree Notomastus sp. (NHM_162) is sister to Notomastus latericeus M. Sars, 1851, but the genus Notomastus is not monophyletic in our tree (Fig. 4).

Remarks

This species is consistent with the genus Notomastus in possessing 11 chaetigers with notochaetae only, followed by abdominal chaetigers with hooded hooks only. As the specimens are poorly preserved with the thorax only or with 2–5 abdominal segments observed, this species cannot be meaningfully compared with other known species in this genus and is therefore not formally described.

Ecology

Found in the eastern polymetallic nodule province of the CCZ.

Taxon Treatment

  • Wiklund, H; Neal, L; Glover, A; Drennan, R; Muriel Rabone, ; Dahlgren, T; 2019: Abyssal fauna of polymetallic nodule exploration areas, eastern Clarion-Clipperton Zone, central Pacific Ocean: Annelida: Capitellidae, Opheliidae, Scalibregmatidae, and Travisiidae ZooKeys, 883: 1-82. doi

Images

Other References

  1. Weigert A, Bleidorn C (2016) Current status of annelid phylogeny. Organisms, Diversity and Evolution 16(2) 345–362. https://doi.org/10.1007/s13127-016-0265-7