Taxa described in 1938

Baeospora is a genus of fungi in the family Cyphellaceae. Basidiocarps (fruit bodies) are agarics. The genus was circumscribed by mycologist Rolf Singer in 1938. The most recently described species, B. occidentalis, is a snowbank fungus that was discovered in montane coniferous forests of the western USA.

Callistopteris is a fern genus in the family Hymenophyllaceae. The genus is accepted in the Pteridophyte Phylogeny Group classification of 2016 (PPG I) but not by some other sources, which sink it into a broadly defined Trichomanes.

Proseriata is an order of free-living flatworms in the class Rhabditophora with over 400 species described worldwide.

Neoxeniades is a genus of skippers in the family Hesperiidae.

Vandenboschia is a fern genus in the family Hymenophyllaceae. The genus is accepted in the Pteridophyte Phylogeny Group classification of 2016 (PPG I) but not by some other sources.

Cheimerius is a monospecific genus of marine ray-finned fish belonging to the family Sparidae, the seabreams and porgies. The only species in the genus is Cheimerius nufar, the santer seabream, santer or soldier, of the Indian Ocean.

Polyphlebium is a fern genus in the family Hymenophyllaceae. The genus is accepted in the Pteridophyte Phylogeny Group classification of 2016 (PPG I) but not by some other sources.

Euryolpium is a genus of pseudoscorpions in the Olpiidae family. It was described in 1938 by Russian zoologist Vladimir Redikorzev.

Hestinalis is a genus of butterflies in the family Nymphalidae. Some authors consider Hestinalis and Hestina as one genus, though phylogenetic analysis has shown Hestinalis nama not to be grouped with Hestina, as had been described in previous literature.

Caloneurodea is an extinct order of polyneopteran neopteran insects in the superorder Orthopterida. Caloneurodea is known from fossils found in North America, Europe, Russia, and Asia and had a paleogeographic range confined to Laurussia.

Platymma tweediei, often called the (Malaysian) fire snail, is the largest land snail in Peninsular Malaysia, living exclusively in the mountainous forests there. It is the only species in the genus Platymma. It is characterized by its black shell and orange to bright red foot.

species of arachnid

Haplopharynx is a genus of small, free living marine flatworms found in the North Atlantic and the Mediterranean. It is the only genus in the monotypic family Haplopharyngidae.

Aporometridae is a monotypic family of crinoids, the only genus being Aporometra, which contains three species, all endemic to the seas around Australia.

Marsikomerus is a genus of centipedes in the family Schendylidae. This genus was described by Austrian myriapodologist Carl Attems in 1938. Species in this genus are found in Mexico and in the United States (in Arkansas, Texas, and Hawaii).

later homonym, do not use

Leucochloridiomorpha is a genus of parasitic trematode in the order Diplostomida. It is the only member of the family Leucochloridiomorphidae, and is monotypic, containing the sole species Leucochloridiomorpha constantiae.

Sparodon, commonly known as the white musselcracker, musselcracker seabream, mussel cracker seabream, brusher, or cracker. is a monotypic genus of fish in the family Sparidae. The type and only known species, Sparodon durbanensis, was first described and named by François Louis Nompar de Caumont de Laporte, comte de Castelnau, in 1861.