NEW DATA ON THE SYSTEMATICS OF RECENT OSTRACODA OF THE GENUS AMBOSTRACON HAZEL 1962 (HEMICYTHERIDAE, PODOCOPIDA) FROM SOUTH AFRICA

• Дата: 2023
• Автори: Дикань, Н.І., Daniel, T.
• Формат: Стаття
• Мова: English
• Опубліковано: Institute of Geological Sciences, NAS of Ukraine 2023
• Теми: Crustacea; Ostracoda; Taxonomy; South Africa; Південна Африка
• Онлайн доступ: http://geojournal.igs-nas.org.ua/article/view/279470
• Назва журналу: Geological journal

The study provides a revision of the taxonomic composition (subgenuses, species) of the genus Ambostracon Hazel 1962 and a monographic description of the fossil (Holocene) and Recent marine ostracods of the genus Ambostracon of South and South-Eastern Africa. The material examined comes from geological stations on the shelf, continental slope and deep-water depression (32–3059 m water depth) of three areas (from the southern coast Mossel Bay to the eastern coast south of Durban, the outer part of Maputo Bay and the eastern coast of South Africa) and surface sediment samples from lagoons, estuaries and coastal lakes of the eastern coast of the South East Africa (Wilderness area, 0.2–1000 m water depth) (R/V METEOR M123-2016). The validity of the selection of the subgenus Ambostracon Patagonacythere is discussed. Two species (Ambostracon keeleri, A. flabellicostata) and one new species (Ambostracon frenzeli sp. nov.) were described. The systematic section provides data about synonymy (compiled on the results of a revision of the species volume), holotype (paratypes, syntypes), material, diagnosis, description, dimensions (linear, relative), sexual dimorphism, individual and geographic variability (fixation of the manifestations and the range of the variability of the morphological elements of the shell), comparison, remarks, localities, stratigraphical position, geographical distribution, environmental conditions of the site (for recent species), palaeoecology (for fossil species), zoogeography. SEM-images of external and internal structures of the carapace (macro- and mesosculpture, central muscle scar field, hinge, normal pore canals) are provided.