|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ПсковГУ |
||
Ectopharyngeata and Endopharyngeata Instead of Protostomia and Deuterostomia?статья Исследовательская статья
Дата последнего поиска статьи во внешних источниках: 15 апреля 2026 г.
- Авторы: Malakhov V.V., Ezhova O.V., Gantsevich M.M.
- Журнал: Moscow University Biological Sciences Bulletin
- Том: 80
- Номер: 4
- Год издания: 2025
- Издательство: Allerton Press
- Местоположение издательства: New York, N.Y., United States
- Первая страница: 161
- Последняя страница: 170
- DOI: 10.3103/S0096392526600109
- Аннотация: The use of molecular phylogenetic methods has caused a profound rearrangement of the system geny of the triploblastic Bilateria (=Triploblastica). Nevertheless, in most phylogenetic trees, twoand phylomain clades remain, coinciding with Protostomia and Deuterostomia, established by K. Grobben (1908) more than 100 years ago. For both clades of Triploblastica, amphystomy is the primary way of forming a through gut. However, the analysis shows that only the origin of the mouth and anus does not allow us to dis- tinguish between the two main clades. All the groups that were referred to Grobben’s Protostomia are char- acterized by an ectodermal pharynx, therefore this clade would be more correctly called Ectopharyngeata. Based on the modification of the pharyngeal cuticle, many ectopharyngeates develop various structures designed to grind food. The groups attributed by Grobben to Deuterostomia have an endodermal pharynx, therefore it would be more correct to call this clade Endopharyngeata. The synapomorphy of Endopharyn- geata is the development of gill slits in the walls of the endodermal pharynx and the division of the pharynx into two zones: the dorsal branchial zone and the ventral digestive zone. During the evolution of the chor- dates, the sides of the body were inverted. As a result, the part of the digestive tube that is homologous to the hemichordate digestive zone of the pharynx became the dorsal notochord and the branchial zone of the phar- ynx turned out to be ventral. Thus, the division of Triploblastica into two clades entirely retains its significance in modern biology, although it is based on a different set of morphological features than that considered by Grobben.
- Добавил в систему: Малахов Владимир Васильевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|