Finding of new species of finless Sagittids (Sagittidae: Chaetognatha) in the northwestern Sea of Japan
Diagnosis of a new genus Abosagitta gen. n. and detailed descriptions and drawings of four new species, as well as keys for the identification of genera of Sagittidae, are given. The new species differ from species of other genera of Sagittidae by lacking lateral fins on the trunk. Instead of two pairs of lateral fins, these species have saclike gelatinous structures. These structures were previously found only in the species of Eukrohniidae (see [2, 4]). The presence of saclike gelatinous structures instead of fins is probably a plesiomorphic feature, which is retained only in some species.
Abstract We propose a mission called SADE, the Starspot And Dynamo Explorer, to study dynamo activity in nearby late-type stars. The onboard instruments will be a Ca-K telescope for magnetically dominated chromospheric emission, and an X-ray grazing incidence telescope to study coronal emission. We design the mission for a life-time of 15 years or longer to capture a full activity cycle for most solar-type stars. We aim to firmly establish the spectrum of the relation between chromospheric and corona' emission in late-type stars, and capture one or more stars going into or coming out of a Maunder type minimum. Operation costs will be kept to a minimum by automating mission operations to a maximum, and have the science operations be carried out by students at Montana State University.