Taxa described in 1923

Cyclosma is a genus of skippers in the family Hesperiidae.

Pseudocopaeodes is a genus of skipper butterflies in the family Hesperiidae.

Bothriospila is a genus of beetles in the family Cerambycidae, and the type genus of the tribe Bothriospilini. It contains two species: the type, Bothriospila elegans, found in Brazil and Paraguay, and Bothriospila pulcherrima, found in Brazil. The latter was described as a new species from Brazil in 2012. Bothriospila was circumscribed in 1923 by Swedish entomologist Per Olof Christopher Aurivillius.

Pseudochiridiidae is a family of pseudoscorpions. It was described in 1923 by American arachnologist Joseph Conrad Chamberlin. Pseudochiridiids are relatively small pseudoscorpions. They are found in plant litter or beneath tree bark. The family was sometimes treated as a subfamily of the Cheiridiidae, but has since been reinstated.

Lepteutypa is a genus of plant pathogens in the family Amphisphaeriaceae. First described by the Austrian mycologist Franz Petrak in 1923, the genus contains 10 species according to a 2008 estimate. It was increased to 15 in 2020.

Biemnidae is a family of sponges belonging to the order Biemnida.

Parapionosyllis is a genus of polychaete annelids, first described by Pierre Fauvel in 1923.

Monoblastia is a genus of lichens in the Monoblastiaceae family of fungi.

Sepikea is a genus of flowering plants belonging to the family Gesneriaceae.

genus of insects

Paralelapia is a genus of sponges belonging to the family Lelapiidae. The only species in this genus is Paralelapia nipponica (Hara, 1894).

Campylostigmus is a genus of centipedes in the family Scolopendridae. It was described by French entomologist Henri Ribaut in 1923.

Codonoboea is a genus of flowering plants in the family Gesneriaceae. It includes 129 species which range from Myanmar and Thailand through northern Malesia (Peninsular Malaysia, Sumatra, Borneo, Sulawesi, the Philippines, and Maluku) to New Guinea.

Stegophylla is a genus of aphids in the subfamily Phyllaphidinae. This genus was first described by entomologist Oscar W. Oestlund in 1923.

Cycloteuthoidea is a superfamily of squid in the order Oegopsida.

Aylostera, is a genus of cactus, native to central Bolivia and north western Argentina. Aylostera was formerly sunk into a broadly circumscribed genus Rebutia, but molecular phylogenetic studies from 2007 onwards showed that when defined in this way, Rebutia was not monophyletic, leading to the resurrection of Aylostera. A 2023 classification of the tribe Cereeae placed it as the only genus in the subtribe Aylosterinae. It was formerly placed in the subtribe Rebutiinae.

Ceratosporella is a genus of fungi. Some species interact with species of trees in the families Betulaceae and Fagaceae (Carpinus betulus, Castanea sativa). Ceratosporella disticha can be isolated from decaying leaves of the palm Arenga westerhautii in Malaysia.

Heoclisis is a genus of cave-dwelling antlions, that is, insects in the family Myrmeleontidae.