Question: Which genus, Bismarckia or Adonis, if either, contains more species ?

Context paragraphs:
Langeronyx: Langeronyx is an extinct genus of basal rhynchosaurid known from the early Middle Triassic (Anisian stage) Bromsgrove Sandstone Formation of Warwickshire, UK.  It contains a single species, Langeronyx brodiei, originally included in the genus "Rhynchosaurus".  "R. brodiei" was first described and named by Michael Benton in 1990, but its redescription by Martín D. Ezcurra, Felipe Montefeltro and Richard J. Butler in 2016 recovered it as more closely related to the more advance hyperodapedontine than to the type species of "Rhynchosaurus" and thus it was moved to its own genus.  The generic name "Langeronyx" honors the Brazilian paleontologist Max Cardoso Langer in recognition of his rhynchosaur research, combined with the Greek "onyx" ("óνυξ") meaning "claw", a common suffix for rhynchosaur genera.  "L. brodiei" is known solely from the holotype, a partial skull divided into the two specimens WARMS G6097/1 and NHMUK PV R8495, housed in the Warwickshire Museum, Warwick and Natural History Museum, London, respectively.  Other specimens originally referred to "R. brodiei" either do not overlap with its type or can be just as likely referred to other basal rhynchosaurids (like "Fodonyx spenceri" and "Bentonyx sidensis" from the coeval Otter Sandstone Formation, UK).  "L. brodiei" is one of two basal archosauromorphs known from the Bromsgrove Sandstone Formation, the other being the lesser known "Rhombopholis scutulata".

Adonis (plant): Adonis is a genus of about 20–30 species of flowering plants of the crowfoot family, Ranunculaceae, native to Europe and Asia.

Scytonema: Scytonema is a genus of photosynthetic cyanobacteria that contains over 100 species.  It grows in filaments that form dark mats.  Many species are aquatic and are either free-floating or grow attached to a submerged substrate, while others species grow on terrestrial rocks, wood, soil, or plants.  "Scytonema" is a nitrogen fixer, and can provide fixed nitrogen to the leaves of plants on which it is growing.  Some species of "Scytonema" form a symbiotic relationship with fungi to produce a lichen.

Quail-thrush: A quail-thrush is a bird of the genus "Cinclosoma", which contains eight species.  Quail-thrushes are in a different family from either quails or thrushes, but bear some superficial resemblance to them.  The genus is found in Australia and New Guinea in a variety of habitats ranging from rainforest to deserts.  The genus is closely related to the jewel-babblers of New Guinea.  Seven species were recognised in 2007.  A molecular study published in 2015 by Gaynor Dolman and Leo Joseph resulted in the splitting of the chestnut-backed quail-thrush into the chestnut quail-thrush of eastern Australia and the copperback quail-thrush in the west.

Bismarckia: Bismarckia is a monotypic genus of flowering plant in the palm family endemic to western and northern Madagascar where they grow in open grassland.  The genus is named for the first chancellor of the German Empire Otto von Bismarck and the epithet for its only species, Bismarckia nobilis, comes from Latin for 'noble'.

Sphaerolana: Sphaerolana is a genus of isopod crustaceans in the family Cirolanidae, all of which are endemic to Mexico.  The genus "Sphaerolana" contains the following species: All three species are on the IUCN Red List as either vulnerable species (VU) or endangered species (EN).

Abortiporus: Abortiporus is a genus of fungi in the family Meruliaceae.  The widely distributed genus contains three species.  Species in the genus grow on the wood of hardwoods and conifers, either alone or around the stumps and living trees.  It causes a white rot in dead wood and a white trunk rot in living wood.  The genus was circumscribed in 1904 by William Alphonso Murrill.

Rhaphiomidas: The mydid fly genus Rhaphiomidas contains fewer than 30 species/subspecies, all of them occurring in the desert regions of the southwestern United States and adjacent portions of northwestern Mexico.  The adults are most commonly encountered in sand dune areas, and are typically only active for a few weeks each year, either in the spring or the fall; in some cases, more than one species can occur in the same dune system, but they are allochronic, each flying in different seasons.  Almost nothing is known about their biology, though eggs or early instar larvae of some species are laid on the soil surface and appear to be attractive to ants, and are brought into the ant nest (it therefore seems likely that the larvae are predators of the ant brood).  The restriction to sand dune areas has unfortunately led a number of these flies to the brink of extinction, especially both subspecies of "R. terminatus", and the species "R. trochilus".  While there is only one of these on the Endangered Species List ("Rhaphiomidas terminatus abdominalis", a.k.a. the "Delhi Sands Flower-loving fly"), many of the remaining taxa - including a few that have not yet been named - are gravely imperiled, as they are restricted to small geographic areas (less than 500 sqmi , sometimes much less), rendering them extremely vulnerable to habitat loss or disturbance.  These habitats are heavily targeted for development, and even if not, activities such as sand mining or motorized off-roading are common, and render the habitat unsuitable for the survival of the flies.

Pnoepyga: Pnoepyga is a genus of passerines endemic to southern and south eastern Asia.  Its members are known as wren-babblers or cupwings.  The genus contains five species.  The genus has long been placed in the babbler family Timaliidae.  A 2009 study of the DNA of the families Timaliidae and the Old World warblers (Sylviidae) found no support for the placement of the genus in either family, prompting the authors to erect a new monogeneric family, the Pnoepygidae.

Myrmeciites: Myrmeciites is an extinct form genus of bulldog ants in the subfamily Myrmeciinae of the family Formicidae, which contains three described species and two fossils not placed beyond the genus level.  Described in 2006 from Ypresian stage (Early Eocene) deposits, all three of the described species and one unplaced fossil are from British Columbia, Canada, while the second unplaced fossil is from Washington State, USA.  These ants were large, with the largest specimens collected reaching 3 cm .  The behaviour of these ants would have been similar to extant Myrmeciinae ants, such as solitary foraging, nesting either in the soil or trees, and leaving no pheromone trail to food sources.  Due to the poor preservation of these ants, their phylogenetic position among Myrmeciinae is unclear, and no type species has been designated.  These ants are classified as "incertae sedis" in Myrmeciinae, but some writers have classified it as "incertae sedis" within the insect order Hymenoptera.  This reclassification, however, has not been accepted; instead, "Myrmeciites" remains in Myrmeciinae.

Supporting paragraphs: Bismarckia Adonis (plant)
Answer: Adonis