Question: Which genus contains a greater number of species, Casuarina or Bacopa?
Context: Periclimenes pholeter, is a species of shrimp belonging to the family Palaemonidae.  The species is closes to "Periclimenes indicus", "P. obscurus" and "P. toloensis", resembling these species in the presence of an epigastric tooth on the carapace, the shape of the abdomen, the spinulation of the carapace, and the unarmed fingers of the first chelipeds. "P. pholeter" most resembles "P. indicus" by the elongatecarpus and long fingers of the second pereiopods, differing in these features from "P. toloensis", which has the fingers slightly less than half as long as the palm.  In "P. obscurus" the fingers are shorter than the palm, but the carpus is about as long as the palm.  From "P. indicus", this species differs: by the greater size; by the much higher rostrum and the greater number of ventral rostral teeth; by the shorter eye; by the less slender antennular peduncle; by the more deeply cleft upper antennular flagellum; by the more robust scaphocerite; by the fingers of the first pereiopods (much longer than the palm); by the more slender pereiopods, especially the fifth, which is much longer than the ischium. The Calyptocephalellidae are a family of toads found in Chile containing two genera, "Calyptocephalella" and "Telmatobufo".  The "Calyptocephalella" genus contains one species, "C. gayi", the helmeted water toad, which is a large aquatic toad weighing up to 0.5 kg .  The "Telmatobufo" genus contains four species, "T. australis", "T. bullocki", "T. ignotus", and "T. venustus".  All species within the family are considered threatened, with "T. bullocki" and "T. venustus" being classified as critically endangered. Macrotus is a genus of bats in the Neotropical family Phyllostomidae.  This genus contains two species, "Macrotus californicus" commonly known as California Leaf-nosed Bat and "Macrotus waterhousii" commonly known as Mexican or Waterhouse's Leaf-nosed Bat.  The range of this family includes the warmer parts of the southwestern United States, Mexico, Central and South America, and the Bahama Islands.  Characteristic for the genus are large ears and the name giving triangular skin flap above the nose, the "leaf".  The California Leaf-nosed Bat inhabits the arid deserts of the southwestern United States as far north as Nevada, south to Baja California and Sonora, Mexico.  The California Leaf-nosed Bat is of medium size, with a total length between 9 and 11 cm Its most distinctive features are the large ears, connected across the forehead.  The body is pale grayish brown dorsally with whitish under parts.  The pelage (fur) on the body is silky, the hairs on the back about 8 mm, on the front about 6 mm long.  The posterior base of the ears are covered with hair of a woolly texture while the interior surface and most of the anterior border shows scattered long hairs.  The flight membranes are thin and delicate; the wings are broad and the tail is slightly shorter that the long hind limbs and extends several millimeters beyond the uropatagium (see Bat).  "Macrotus waterhousii" is also a big eared Bat which has ranges from Sonora to Hidalgo Mexico, south to Guatemala and the Greater Antilles (excluding Puerto Rico) and Bahamas.  This species roosts primarily in caves, but also in mines and buildings.  This species is also insectivorous (see insectivore), primarily consuming insects of the order Lepidoptera and Orthoptera.  The mating and parturition times of M. "waterhousii" vary from island to island with 4–5 months gestation. Lophodermium is a genus of fungi within the family Rhytismataceae.  The genus contains 145 species and has a global distribution.  Species of this genus are usually observed producing zone lines, conidiomata and ascomata on dead fallen leaves, but at least some are known to colonize living leaves.  In many cases they then live inside the colonized leaf as a symptomless endobiont, where they are regarded as detritivores utilising dead plant matter.  In a few cases they may kill all or part of the leaf prematurely, and there is a substantial literature dealing with those species as plant pathogens.  The genus infects many different plant families but with a notable concentration in the family Pinaceae; many "Lophodermium" species are restricted to a single host genus (or even species), but some, particularly those infecting grasses, may infect several genera.  Some are economically important plant pathogens, such as those that cause needlecast disease in European Black Pine, Scots Pine and Red Pine in forestry and christmas tree plantations.  In these species, notably "L. pinastri" and "L. seditiosum", the fungal spores disperse and infect the pine needles in late summer, which turn brown by the following spring and then fall off. Casuarina is a genus of 17 tree species in the family Casuarinaceae, native to Australia, the Indian subcontinent, southeast Asia, and islands of the western Pacific Ocean.  It was once treated as the sole genus in the family, but has been split into three genera (see Casuarinaceae). Megalurus is a genus of passerine bird in the family Locustellidae.  The genus was once placed in the Old World warbler "wastebin" family Sylviidae.  The genus contains six species also known as the typical grassbirds.  The genus is distributed from northern China and Japan, to India in the west, and Australia in the south, with most species being located wholly or partly in the tropics.  The genus is also sometimes considered to include the genus "Bowdleria", which holds the fernbirds of New Zealand.  The most widespread species, the tawny grassbird, ranges from the Philippines to southern New South Wales, whereas the Fly River grassbird is restricted to swampland in the southern part of New Guinea.  The natural habitat of the typical grassbirds is, as the name suggests, wet grasslands, swamps and other marshlands.  Some species exist away from water in tall grasslands, heathlands, and forest clearings.  Some species have adapted to the margins of rice fields and gardens. Eggysodon is an extinct genus of odd-toed ungulate.  It was a small, ground-dwelling browser, and fossils have been found in Oligocene rocks of Germany.  A closely related genus, but with a greater number of incisors and premolars, has been found in Oligocene rocks in Khazakhstan.  The genus, "Tenisia", was described in 1915.  "Eggysodon" may have been related to "Preaceratherium", and both had tusklike canines and smaller, and fewer, incisors.  It is also related to "Prohyracodon", and is synonymous with "Allacerops". Lysiosquillina maculata, the zebra mantis shrimp or striped mantis shrimp, is a species of mantis shrimp found across the Indo-Pacific region from East Africa to the Galápagos and Hawaiian Islands.  At a length up to 40 cm, "L. maculata" is the largest mantis shrimp in the world.  "L. maculata" may be distinguished from its congener "L. sulcata" by the greater number of teeth on the last segment of its raptorial claw, and by the colouration of the uropodal endopod, the distal half of which is dark in "L. maculata" but not in "L. sulcata".  A small artisanal fishery exists for this species. Ningyuansaurus is a basal oviraptorosaurian dinosaur genus.  It contains the single species Ningyuansaurus wangi, known from a fossil specimen from the Early Cretaceous Yixian Formation (Aptian stage, 124.6 Ma ago) of Jianchang, western Liaoning Province, People's Republic of China.  It is thought to be the basalmost species of oviraptorosaur, based on its long skull and a greater number of teeth in comparison to any other known oviraptorosaur.  The generic name "Ningyuansaurus" is derived from Ningyuan, an ancient name for Xingcheng City.  The specific name honors Wang Qiuwu, the private owner of the specimen who donated it for scientific study.  The specimen is currently housed in the Confuciusornis Museum in Xingcheng. Bacopa is a genus of 70–100 aquatic plants belonging to the family Plantaginaceae.  It is commonly known as Waterhyssop (or Water Hyssop, though this is more misleading as "Bacopa" is not very closely related to hyssop but simply has a somewhat similar appearance).
Answer: Bacopa