Anatomy of the Tantulocarida: first results obtained using TEM and CLSM. Part I: tantulus larva

Petrunina, A.S.; Høeg, J.T.; Kolbasov, G.A.

Авторы: Petrunina A.S., Høeg J.T., Kolbasov G.A.
Журнал: Organisms Diversity and Evolution
Год издания: 2018
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 1
Последняя страница: 19
DOI: 10.1007/s13127-018-0376-4
Аннотация: The morphology of Tantulocarida, a group of minutely sized ectoparasitic Crustacea, is described here using for the first timetransmission electron microscopy (TEM) and confocal laser scanning microscopy (CLSM). This enabled a detailed analysis of theirinternal anatomy to a level of detail not possible with previous light microscopic investigations.We studied the infective stage, thetantulus larva, attached on the crustacean host in two species, Arcticotantulus pertzovi and Microdajus tchesunovi, and put specialemphasis on cuticular structures, muscles, adhesive glands used in attachment, sensory and nervous systems, and on the organs usedin obtaining nutrients from the host. This allowed description of structures that have remained enigmatic or unknown until now. Adoubly folded cuticular attachment disc is located at the anterior-ventral part of the cephalon and used for gluing the larva to the hostsurface with a cement substance released under the disc. Four cuticular canals run from a cement gland, located ventrally in thecephalon, and enter an unpaired, cuticular proboscis. The proboscis can be protruded outside through a separate opening above themouth and is used for releasing cement. An unpaired and anteriorly completely solid cuticular stylet is located centrally in thecephalon and is used only for making a 1-μm-diameter hole in the host cuticle, through which passes a rootlet system used forobtaining nutrients. The rootlet system is a direct extension of the anterior gut of the tantulus, but inside the host, it consists of cuticleonly. Several muscular systems seemto degenerate very quickly after the tantulus has settled on the host. The central nervous systemis reduced to an absolute minimum in terms of both cell size and number.We discuss the morphology of the tantulus in light of theTantulocarida being a sister group to the Thecostraca or even nested within that taxon.
Добавил в систему: Колбасов Григорий Александрович

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Anatomy of the Tantulocarida: first results obtained using TEM and CLSM. Part I: tantulus larvaстатья

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