Hyalinothricinae Fisher, 1911

Gale, Andrew S., 2020, The fossil record of the asteroid (Echinodermata) family Chaetasteridae Sladen 1889 and subfamily Hyalothricinae Fisher, 1911, Zootaxa 4858 (1), pp. 144-150 : 148

publication ID

https://doi.org/ 10.11646/zootaxa.4858.1.11

publication LSID

lsid:zoobank.org:pub:93DB37F6-2564-4E3A-AA25-4A842994BE68

DOI

https://doi.org/10.5281/zenodo.4510554

persistent identifier

https://treatment.plazi.org/id/0397B63B-5276-FFDF-FF13-FE4565D8FC2D

treatment provided by

Plazi

scientific name

Hyalinothricinae Fisher, 1911
status

 

Subfamily Hyalinothricinae Fisher, 1911 View in CoL

Included genera. Hyalinothrix Fisher, 1911 ; Seriaster Jangoux, 1984 ; Tarachaster Fisher, 1913 ; Chaetasterina Hess, 1970 ( Mah & Fujita 2020).

Diagnosis. Abactinals small, paxillose, imbricating; supero- and inferomarginals small, of equal size. All external ossicles bear a tuft of densely packed, glassy spines, positioned on a raised central region.

Remarks. Hyalinothrix was removed from the Ganeriidae Sladen, 1889 and the subfamily Hyalothricinae placed in the family Asterinidae on the basis of molecular evidence, supported by some morphological features, notably the imbricating abactinal plates and the presence of paxillae similar to those developed in some asterinids ( Mah & Fujita 2020). The genus has well-developed, but small supero- and inferomarginals ( Fig. 2L View FIGURE 2 ); the paxillose abactinal ossicles possess imbricating basal processes and form a tessellation around the large popular pores ( Fig. 2M View FIGURE 2 ).

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