The New Zealand triplefin Grahamina signata (Teleostei; Tripterygiidae): A junior synonym of G.gymnota from Tasmania

Latest version published by Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node on Aug 8, 2018 Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node

The triptcrygiid fish Grahamina signata Fricke & Roberts, 1993 was described from 174 specimens collected from several exposed locations around the coast of New Zealand. It was distinguished from the Tasmanian G. gymnota (Scott 1977) by the number of pored scales in the lower lateral line, the number of branches of the supraorbital tentacle, and the colouration of the pectoral-fin base.Examination of new material of G. signata from the Auckland region, and re-examination of type material of G. gymnota, show that the supraorbital tentacle and lower lateral line are not differences of taxonomic significance. Pectoral fin colouration in a published underwater photo of G. gymnota suggests that the colour difference was due to the effects of preservation. We therefore refer G. signata to the synonymy of G. gymnota. This synonymy, in combination with the restricted Tasmanian distribution and dispersal capabilities of the species, suggests that G. gymnota was introduced to Tasmania from New Zealand.

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How to cite

Researchers should cite this work as follows:

Clements K (2016): The New Zealand triplefin Grahamina signata (Teleostei; Tripterygiidae): A junior synonym of G.gymnota from Tasmania. v1.1. Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. Dataset/Occurrence. https://nzobisipt.niwa.co.nz/resource?r=nztriplefin_gymnota&v=1.1

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The publisher and rights holder of this work is Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node. This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: d22f7b9a-d2d5-42d2-8b44-adb09b338a25.  Southwestern Pacific Ocean Biogeographic Information System (OBIS) Node publishes this resource, and is itself registered in GBIF as a data publisher endorsed by Ocean Biogeographic Information System.

Keywords

Occurrence; Observation

Contacts

Who created the resource:

Kendall Clements
School of Biological Sciences
University of Auckland Private Bag 92019 Auckland NZ

Who can answer questions about the resource:

Kendall Clements
School of Biological Sciences
University of Auckland Private Bag 92019 Auckland NZ

Who filled in the metadata:

Kevin Mackay
Marine Data Manager
NIWA Private Bag 14-901 Wellington NZ

Who else was associated with the resource:

Author
Laith Jawad
School of Biological Sciences
University of Auckland Private Bag 92019 Auckland NZ
Author
Andrew Stewart
Scientist
Museum of New Zealand Te Papa Tongarewa P.O. Box 467 Wellington NZ

Geographic Coverage

New Zealand and Tasmania

Bounding Coordinates South West [-46.929, -176.3], North East [-35.267, 147.258]

Taxonomic Coverage

Tripterygiid triplefins of the Genus Grahamina

Species  Grahamina gymnota,  Grahamina capito,  Grahamina nigripenne

Sampling Methods

We attempted to identify material examined to genus and species following Fricke & Roberts (1993) and Fricke (1994). Counts and measurements follow Hubb & Lagler (1958). Measurements were performed with digital calipers. Lateral line scale counts included all pored scales. Supraorbital tentacle counts included tentacles greater in length than width. Where possible, lateral line scales and supraorbital tentacles were counted on both sides of the body (thus each specimen has two counts).

Study Extent Northern New Zealand (esp. Auckland region) and Tasmania

Method step description:

  1. The total sample sizes of specimens examined for various characters. It was not possible to count pored scales in the lower lateral line of many of the Whatipu G. signata specimens. These pored scales are visible against the darker background pigmentation in darker coloured males and in specimens preserved for a length of time, but not in the lighter coloured females from the Whatipu site.

Bibliographic Citations

  1. Kendall D. Clements , Laith A. Jawad & Andrew L. Stewart (2000) The New Zealand triplefin Grahamina signata (Teleostei; Tripterygiidae): A junior synonym of G. gymnota from Tasmania, Journal of the Royal Society of New Zealand, 30:4, 373-383, DOI: 10.1080/03014223.2000.9517629 http://dx.doi.org/10.1080/03014223.2000.9517629

Additional Metadata

marine, harvested by iOBIS

Alternative Identifiers d22f7b9a-d2d5-42d2-8b44-adb09b338a25
https://nzobisipt.niwa.co.nz/resource?r=nztriplefin_gymnota