In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. In contrast an oligotypic taxon contains more than one but only a very few subordinate taxa.
Apogon is a large genus of fish in the family Apogonidae, the cardinalfishes. They are among the most common fish on coral reefs. Over 200 species have been classified in genus Apogon as members of several subgenera. Some of these subgenera, such as Ostorhinchus, have been elevated to genus status, leaving just over 50 species in the genus.
Apogonichthyoides is a genus of fish in the family Apogonidae, the cardinalfishes. They are native to the Indian Ocean and the western Pacific Ocean.
Archamia is a genus of cardinalfishes native to the Indian Ocean and the western Pacific Ocean.
Foa is a genus of fishes in the family Apogonidae, the cardinalfishes, native to the Indian and Pacific Oceans.
Gymnapogon is a genus of fish in the family Apogonidae. They are native to the Indo-West Pacific and central Pacific Oceans, where they occur in reefs and nearby habitat types. These species are usually no more than 5 centimeters long and have semitransparent bodies without scales. The genus name is a compound noun formed by combining the Greek gymnos meaning "naked", referring to the lack of scales in the type species, Gymnapogon japonicus, and Apogon, the type genus of the Apogonidae. One species, the B-spot cardinalfish, is notable for its larvae being rather large, conspicuous and fast-swimming.
Jaydia is a genus of fishes in the family Apogonidae native to the western Pacific Ocean.
Lachneratus phasmaticus, also known as the phantom cardinalfish, is a species of fish in the family Apogonidae, the cardinalfishes. It is the only member of its genus. It is native to the tropical eastern Pacific and Indian Oceans. This fish can be found in crevices and underwater caves, and it occurs at depths of 3 to 104 m. It grows to a standard length of 7.4 cm (2.9 in).
Ostorhinchus is a genus of ray-finned fish in the family Apogonidae native to the Indian and Pacific Oceans.
Paxton concilians, also known as the Paxton's cardinalfish, is a species of cardinalfish native to the Indian Ocean waters off of western Australia where it is found over the continental shelf at depths of from 46 to 80 metres. This species grows to a length of 7.6 centimetres (3.0 in) SL. This species was previously classified as the only known member of its genus and of its subfamily but the 5th edition of Fishes of the World placed the genus in the subfamily Pseudaminae. The genus name honours the Australian zoologist John R. Paxton of the Australian Museum in Sydney who provided the describers with the type specimens while the specific name means the uniting of disparate parts into a whole, a reference to this species continuous dorsal fin.
Pristiapogon is a genus of cardinalfishes native to the Indian and Pacific Oceans.
Pristicon is a genus of cardinalfishes native to the western Pacific Ocean.
Pseudamiops is a genus of cardinalfishes native to the Pacific and Indian oceans.
Archamia bleekeri, also known as Gon's cardinalfish, is a species of fish in the family Apogonidae, the cardinalfishes. It is native to the coastal waters of the Indian Ocean and the western Pacific Ocean from Africa to Indonesia and from Taiwan to Queensland, Australia. This species occurs in mangrove forests and reefs, and is an inhabitant of shipwrecks, preferring silty areas with muddy or sandy substrates. This species grows to a total length of 10 cm (3.9 in). This species is the only member of its genus. The other species were moved to the new genus Taeniamia in 2013.
Taeniamia is a genus of cardinalfishes native to the Indian Ocean and the western Pacific Ocean.
Ozichthys is a monotypic genus of cardinalfish, which was named and characterized in 2014. Its sole species, Ozichthys albimaculosus, is found in tropical Australia and southern New Guinea.
Paroncheilus affinis, the bigtooth cardinalfish or longtooth cardinalfish, is a species of marine fish in the family Apogonidae and the only member of its genus. The bigtooth cardinalfish lives in the west-central Atlantic, off southern Florida, United States, and from the Bahamas to Venezuela, and as far south as Suriname. This species also is found in the east-central Atlantic and the Gulf of Guinea, and has been reported as far as Cape Verde. It is a pale orangeish colour.
Verulux is a genus of fishes in the family Apogonidae found in the Indian and Pacific Oceans.
Taeniamia fucata, commonly known as the orange-lined- or painted cardinalfish, is a marine fish native to reefs from northern Australia and New Guinea, across the Indian Ocean to the east coast of Africa, and Pacific Ocean to Marshall Islands, Samoa, Tonga, and the Ryukyu Islands. It was known as Archamia fucata until 2013. FishBase treats T. sansibaricus as synonymous with T. fucata. but T. sansibaricus is recognised as valid by the Catalog of Fishes:
Xeniamia atrithorax, is a species of cardinalfish in the family Apogonidae found in South China Sea off Khanh Hoa Province in Vietnam. This species is the only member of its genus. X. atrithorax is a possibly luminous species.
