Heterostropha was a previously used taxonomic category, an order of sea snails, within the superorder Heterobranchia.
 In the most current gastropod taxonomy, that of Bouchet & Rocroi, this taxon is no longer in use.
Sigmurethra is a taxonomic category of air-breathing land snails and slugs, terrestrial pulmonate gastropod molluscs.
 This is an informal group which includes the majority of land snails and slugs.
Eogastropoda was a previously used taxonomic category of snails or gastropods, a subclass which was erected by Ponder and Lindberg in 1997.
 It was one of two great divisions (subclasses) of the class Gastropoda, the snails.
 The other subclass of gastropods was the Orthogastropoda.
Cladorhiza inversa is a species of sponge in the taxonomic category of Demospongiae.
 The body of the sponge consists of a spicule and fibers and is water absorbent.
Cladorhiza segonzaci is a species of sponge in the taxonomic category of Demospongiae.
 The body of the sponge consists of a spicule and fibers and is water absorbent.
Helleborine is the common name for a number of species of orchid.
 It does not correspond to any currently used taxonomic category.
 Some of the plants called helleborines are classified in the genus "Epipactis", some in genus "Cephalanthera".
 A genus "Helleborine" was formerly recognised but has now been absorbed into the Grass pink genus "Calapogon".
Gammaridae is a family of amphipods.
 In North America they are included among the folk taxonomic category of "scuds", and otherwise gammarids is usually used as a common name.
Diospyros is a genus of over 700 species of deciduous and evergreen trees and shrubs.
 The majority are native to the tropics, with only a few species extending into temperate regions.
 Depending on their nature, individual species are commonly known as ebony or persimmon trees.
 Some are valued for their hard, heavy, dark timber, and some for their fruit.
 Some are useful as ornamentals and many are of local ecological importance.
Aciphylla is a genus of about 40 species of plants in the Apiaceae family, endemic to New Zealand and Australia.
 They generally grow as tall spikes surrounded by rosettes of stiff, pointed leaves.
 Some species are known as Spaniard Grass.
Aptera is an obsolete taxonomic category, which included the Apterygota along with various other wingless arthropods.

Question: To which taxonomic category do both Aciphylla and Diospyros belong?
Answer: genus