Redescriptions are given at species and subspecies levels for the sari groups (12 species) in the subgenus Terias. The following aspects of each recognized species and subspecies are presented: current combination, synonymy, diagnosis, external features, male and female genitalia, variation (seasonal and geographical), type material examined, material studied, taxonomic remarks, relationship, distribution, habitat, habits, early stages; adults of every recognized taxon, and male and female genitalia of every species are illustrated.

The typical Ryoseki-type plant, Cupressinocladus sp. was found from the equivalent of the Wakino Formation, Yamaguchi Prefecture. This paper deals with its description and its significance for the Early Cretaceous phytogeography in Japan.

A large tooth of a carnivorous dinosaur is reported as the first record from the Lower Cretaceous Kwanmon Group, northern Kyushu, Japan. The characters of the tooth, such as fine serration, rugose longitudinal surface ornamentation and compressed shape, are significant, and a new genus and species, Wakinosaurus satoi is proposed. The genus is allocated to the Family Megalosauridae tentatively.