Stenopterygius is an extinct genus of thunnosaur ichthyosaur known from Europe. This genus of ichthyosaur grew to a maximum length of 4 meters.
Amphoroidea falcifer is an isopod of the family Sphaeromatidae, endemic to New Zealand. It grows up to 14 millimetres (0.55 in), and is found on algae such as Durvillea.
Tylognathus is an invalid genus of ray-finned fishes in the family Cyprinidae. It was established by Heckel in 1843 without a type species. Varicorhinus diplostomus, described by Heckel in 1838 and erroneously redescribed by the same author in 1844 as T. valenciennesii, was later designated the type species. Today this fish is placed in the genus Bangana.
Acrochordonichthys is a genus of catfishes of the family Akysidae. It includes ten species.
Paradiaptomus is a genus of crustacean in the family Diaptomidae. It includes the following species:
Acrochordonichthys falcifer is a species of catfish of the family Akysidae. It' is known only from the Kinabatangan and Segama River drainages, and possibly from the Kayan River drainage, in north-eastern Borneo. A. falcifer falls into the second species group of its genus—the A. rugosus section. It includes A. falcifer, A. chamaeleon, A. pachyderma, and A. rugosus.
Puntioplites is a genus of cyprinid fish that occurs in Southeast Asia. There are currently four described species in this genus.
Puntioplites falcifer is a species of ray-finned fish in the genus Puntioplites which is endemic to the Mekong basin in Thailand, Laos, Cambodia and Vietnam.
Meyerasaurus is an extinct genus of rhomaleosaurid known from Holzmaden, Baden-Württemberg of southeastern Germany.
Prognathodes falcifer, the northern scythemarked butterflyfish or northern scythe butterflyfish, is a species of butterflyfish found at rocky reefs in the tropical easter Pacific, where found at depths of 3–270 metres (9.8–885.8 ft) off southern California, southern Baja California, Guadalupe Island, San Benito Island and Revillagigedo Islands. In the past it also included populations off Central and South America, but in 1995 these were described as a separate species, P. carlhubbsi. Compared to that species, P. falcifer has whitish-grey belly and flanks, the black line through the eye is paler and less distinct, and the angle of the inverted black "V" on the side is shallower.
Prognathodes carlhubbsi, the southern scythemarked butterflyfish or southern scythe butterflyfish, is a species of butterflyfish found at rocky reefs in the tropical easter Pacific, where found at depths of 12–270 metres (39–886 ft) at the Galápagos Islands, Cocos Island, Malpelo Island, and off northwestern Peru. Until P. carlhubbsi was described as a separate species in 1995, populations in these regions were included in P. falcifer. When separated, the true P. falcifer is restricted to more northernly regions, and it has whitish-grey belly and flanks, the black line through the eye is paler and less distinct, and the angle of the inverted black "V" on the side is shallower.
Scythemarked butterflyfish can refer to two fish species:
Hauffiopteryx is an extinct genus of ichthyosaur known from Germany, Luxembourg and Somerset of the United Kingdom.
Inanidrilus falcifer is a species of annelid worm. It is known from subtidal silty coral sands on the Caribbean side of Barbados, in the Atlantic Ocean.
Glomeremus is a cricket genus in the subfamily Gryllacridinae.
Paracestracion is an extinct genus of heterodontid sharks from Late Jurassic-aged rocks from Germany. The genus contains five species: P. bellis, P. falcifer, P. pectinatus, P. sarstedtensis and P. viohli.
Cosmochilus cardinalis is a species of cyprinid in the genus Cosmochilus. It inhabits the Mekong in Yunnan, China.
Cosmochilus nanlaensis is a species of cyprinid in the genus Cosmochilus. It inhabits the Mekong in Yunnan, China.
Lobocheilos falcifer is a species of cyprinid in the genus Lobocheilos. It inhabits Malaysia and Indonesia and has a maximum length of 33.5 centimetres (13.2 in).
