Stereodiktyoma Gooday & Holzmann, 2024

Holzmann, Maria, Barrenechea-Angeles, Inés, Lim, Swee-Cheng & Pawlowski, Jan, 2024, New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific), Zootaxa 5419 (2), pp. 151-188 : 169-170

publication ID

https://doi.org/ 10.11646/zootaxa.5419.2.1

publication LSID

lsid:zoobank.org:pub:88353CBA-6C4D-40E3-8475-B1FCA2C48637

DOI

https://doi.org/10.5281/zenodo.11247636

persistent identifier

https://treatment.plazi.org/id/825B89AF-EE43-49FD-8781-D65751C9FC2A

taxon LSID

lsid:zoobank.org:act:825B89AF-EE43-49FD-8781-D65751C9FC2A

treatment provided by

Plazi

scientific name

Stereodiktyoma Gooday & Holzmann
status

gen. nov.

Stereodiktyoma Gooday & Holzmann View in CoL gen. nov.

Diagnosis. Test attached, delicate, forming a complex three-dimensional network of tubular elements, not arranged according to any particular pattern. Wall soft, finely agglutinated.

Etymology. From the Ancient Greek στερεός (stereós), literally meaning “solid” but in this context three-dimensional, and the Greek diktyoma meaning a ‘network’. Gender neuter

Remarks. Stereodiktyoma has morphological characteristics that resemble those of several existing genera. Tendalia has a reticulated arrangement of tubes, but these lie more or less in one plane and the walls are thinner, coarser-grained and more rigid and brittle than those of the new genus. In some species of Syringammina , notably the type species S. fragilissima, the test comprises a three-dimensional system of tubes. However, like those of Tendalia , the tubes are relatively thin-walled, rigid and brittle, as well as being arranged, at least peripherally, in a distinct pattern, with ‘radial branches’ and ‘anastomosing lateral branches (that) form consecutive layers’ (p. 36 in Tendal, 1972). The new genus is most similar morphologically to Shinkaiya lindsayi , also the type species of its genus. This has a test comprising a meshwork of anastomosing tubes, the walls of which are relatively thick, fine-grained, soft delicate, and therefore quite similar to those of the new genus.

There is no genetic support for a close relationship between Stereodiktyoma and either Shinkaiya or Syringammina ( Fig. 1 View FIGURE 1 ). It does branch in the same clade as Tendalia , although with no bootstrap (BV) support. The closest species to Stereodiktyoma genetically is Galatheammina sp. 2 of Gooday et al. (2017a). This relationship is supported by 100% BV, but as explained below, there is very little morphological similarity between the two species.

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