Studies on twelve common bivalve larvae,with notes on bivalve spawning seasons in New Zealand

Twelve common bivalve larvae occurring in the plankton from the Bay of Islands (35°15'S, 174°10'E), Wellington Harbour (41°16'S, 174°51'E), and off Raumati Beach (40°56'S, 174°58'E), New Zealand, during 1970–72 are described and, wherever possible, provisionally identified. The seasonal occurrences of these larvae in the plankton are also described. Information on the spawning cycles of some New Zealand adult bivalves is reviewed; although some species have a short (4 months or less) spawning season, for most it is much longer, possibly with ‘trickle’ spawning through several months of the year.     

石炭纪海扇超科一新科

本文描述了采自新疆准噶尔地区石炭纪的海扇类标本,认为它们具有一种新的韧带组合类型,即韧带区由两个三角形弹体窝和细弱的韧带槽组成,并建立一新科(Binipectinidae)。