Visaya Supplement 12 "New Species of Cerithopsidae and Newtoniellidae from Okinawa (Japan-Indo-Pacific)"
by Alberto Cecalupo & Ivan Perugia
ISBN 978-3-939767-98-5, published in 2019 by Conchology, Inc., laminated paper covers, 8 by 11.75 inches, 20 by 30 cm., 84 pages, 25 full page color photographic plates and color figures in text with their species descriptions
A regional study of the specimens in these families found in Okinawa based on 828 specimens which yielded 92 distinct species of which 21 are newly described. An additional 59 species have had their range now extended to Okinawa.