A new species of Leiochrides Augener, 1914 (Annelida: Capitellidae) from the Beibu Gulf, South China Sea
BIODIVERSITY DATA JOURNAL
Authors: Lin, Jun-Hui; Garcia-Garza, Maria; Lin, He-Shan; Wang, Jian-Jun
Abstract
Background Polychaetes of the family Capitellidae are poorly studied in Chinese waters. Amongst the known capitellid genera in China, Leiochrides Augener, 1914 is an unusual genus encountered in marine surveys. New information In this study, a Leiochrides specimen was obtained during a survey conducted in the Beibu Gulf, northern South China Sea and described herein as a new species Leiochrides guangxiensis sp. nov. The new species differs from its congeners by having uniramous chaetiger 1, chaetigers 11-12 with notopodial capillaries and neuropodial hooks, abdominal hooks with seven teeth above the main fang in three rows, pygidium with four anal cirri, and branchial fascicles with up to 17 filaments. The taxonomic status of the monospecific genus Pseudoleiocapitella Harmelin, 1964 and Leiochrides norvegicus Fauchald, 1972 are discussed.
Cretaceous Phoenicopsis Heer (Leptostrobales): A new species and a geological history of the genus
CRETACEOUS RESEARCH
Authors: Nosova, Natalya; Herman, Alexei; Grabovskiy, Alexander; Kostina, Elena
Abstract
Most Late Cretaceous Phoenicopsis leaves lack preserved cuticle and so have been determined as Phoenicopsis ex gr. angustifolia, P. ex gr. speciosa or Phoenicopsis sp. using only macromorphology. We studied the epidermal characters of leaves from the Santonian-Campanian Emuneret Formation of the Enmy-vaam River Basin in Chukotka, Northeastern Russia. Based on this study, here we describe a new species, P. chukotkensis sp. nov., revealing unique morphological and epidermal features. It possesses stomata arranged in bands on one leaf surface and in rows on another and hence belongs to the subgenus Windwardia. This is the first find of the subgenus Windwardia in the Late Cretaceous. Analysis of the Cretaceous Phoenicopsis distribution reveals that remains of Phoenicopsis leaves are not numerous in the Western Hemisphere, where it is known only in the Albian of Western Canada and Albian-Cenomanian of Northern Alaska. In the Eastern Hemisphere, Phoenicopsis occurrences are sporadic in the Lower Cretaceous of western Eurasia, where bundles of Phoenicopsis leaves have been found in England, West Spitsbergen, Franz Josef Land, the Middle Urals and Western Kazakhstan. Abundant Early Cretaceous remains of Phoenicopsis have been reported in Eastern and Northeastern Asia. In the Upper Cretaceous of the Eastern Hemisphere, Phoenicopsis is known only in Northeastern Russia and the Russian Far East. Most likely, plants with Phoenicopsis foliage retreated from the south due to the late Albian aridization across Central Asia. They persisted in cooler and wetter conditions of higher palaeolatitudes where the palaeoclimate was similar to a modern humid temperate one. (C) 2020 Elsevier Ltd. All rights reserved.