|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Holothuroidea - Apodida - Myriotrochidae
It was assigned to Theeliidae by Said and Barakat (1958), Frizzell and Exline (1966) and Garbowska and Wierzbowski (1967); to Theelidae by Górka and Luszczewska (1969); to Apodida by Sepkoski (2002); and to Myriotrochidae by Reich (2002) and Reich and Wiese (2010).
|Year||Name and author|
|1875||Hemisphaeranthos Terquem and Berthelin p. 113|
|1958||Hemisphaeranthos Said and Barakat p. 270 figs. pl. 6 fig. 18|
|1966||Hemisphaeranthos Frizzell and Exline p. U668|
|1967||Hemisphaeranthos Garbowska and Wierzbowski p. 536|
|1969||Hemisphaeranthos Górka and Luszczewska p. 380|
|2002||Hemisphaeranthos Reich p. 387|
|2002||Hemisphaeranthos Sepkoski, Jr.|
|2010||Hemisphaeranthos Reich and Wiese p. 355|
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.