Gonaxia intermedia Vervoort, 1993
publication ID |
https://doi.org/ 10.5852/ejt.2016.218 |
publication LSID |
lsid:zoobank.org:pub:A4D7AA38-D18F-4604-A5E0-D965637BD9F8 |
DOI |
https://doi.org/10.5281/zenodo.3853783 |
persistent identifier |
https://treatment.plazi.org/id/3D2E87D5-F806-FF8C-FDA4-FB04FD54FD8A |
treatment provided by |
Valdenar |
scientific name |
Gonaxia intermedia Vervoort, 1993 |
status |
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Gonaxia intermedia Vervoort, 1993
Figs 2D View Fig , 3 View Fig G–K
Gonaxia intermedia Vervoort, 1993: 157 , figs 23e, 24d, 25a–c, 26a.
Material examined
BATHUS 4: Stn. DW902, several colonies and fragments, up to 9.5 cm high, mostly fertile, bearing male gonothecae (MNHN-IK- 2012 -16524); Stn. CP 906, a total of twelve fertile colonies (10 male and 2 female), 4–6 cm high (MNHN-IK- 2012 -16525).
Remarks
In some colonies, the length of cladia reaches as much as 2.8 cm, and each may bear up to 116 hydrothecae. Aberrant secondary cladia, as those occurring in specimens from Stn. DW902, are given off from either within some cladial hydrothecae ( Fig. 3J View Fig ), or from short, auxiliary cladial tubes running parallel to the proximal parts of the axes of cladia.
Both male and female colonies are present in the material in hand. As stated by Vervoort (1993), the gonothecae of this species resemble those of G. amphorifera and G. ampullacea through their general shape and nearly fully adnate condition. They seem to originate from below the axillar hydrothecae. The distal part of a gonotheca overlaps the proximal part of the following one, though their bodies never fuse with each other. Their apertures (50–65 µm wide in males, and 250–290 µm wide in females) are mounted on raised cones situated near the distal ends of their bodies. In the male colonies, the gonothecae are so obscured by the numerous auxiliary tubes running parallel to the stem, that only the tips of their neck regions protrude from the strongly fascicled mass which composes the stems. In one male specimen (from Stn. CP906) with otherwise normal gonothecae, an elongate, abortive gonotheca, with two distal apertures, is given off from the lumen of a cladial hydrotheca The occurrence of such gonothecae is considerable in the material from Stn. DW902, and specimens with one ( Fig. 3K View Fig ), two ( Fig. 3J View Fig ), or exceptionally three apertures could be seen. These so called abortive gonothecae may prove fully functional, as they are provided with apertures. However, their lumina are empty in the specimens in hand, and this assumption could not be checked at this stage.
Geographical distribution
New Caledonia ( Vervoort 1993; present study).
CP |
University of Copenhagen |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Hydroidolina |
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Gonaxia intermedia Vervoort, 1993
Galea, Horia R. 2016 |
Gonaxia intermedia
Vervoort W. 1993: 157 |