| Autor: |
Miroliubov, Aleksei, Lianguzova, Anastasia, Krupenko, Darya, Poliushkevich, Liudmila, Novokreshchennykh, Semyon, Arbuzova, Natalia, Kremnev, Georgii |
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| Zdroj: |
Biology (2079-7737); Dec2024, Vol. 13 Issue 12, p968, 18p |
| Abstrakt: |
Simple Summary: Mycetomorpha vancouverensis is an enigmatic parasitic barnacle from the family Mycetomorphidae. This species, like other Rhizocephala, undergoes significant morphological transformation due to its parasitic lifestyle. The adult females have an externa, a reproductive organ, and an interna, a system of rootlets that infiltrate the host for feeding and host manipulation. The phylogenetic position of M. vancouverensis has been unclear for a long time as it shares characteristics of both basal and diverged families. The molecular analysis of the 18S rDNA confirmed its close relationship with the representatives of the family Peltogastridae, helping to place it on the evolutionary tree. In addition, we provided a detailed description of the morphology and histology of both the externa and interna. The interna branches out into trophic and invasive rootlets, with the latter invading the host's nervous system. These invasive rootlets are organized into goblet-shaped organs, which are present in basal groups. Thus, our morphological data support the hypothesis that Mycetomorpha represents an early evolutionary branch within Rhizocephala. Mycetomorpha vancouverensis is an enigmatic parasitic barnacle from the family Mycetomorphidae, known for its unclear phylogenetic position within Rhizocephala. Specimens of M. vancouverensis were collected from infected Neocrangon communis shrimps near the South Kuril Islands. Detailed morphological studies were conducted using histological techniques and scanning electron microscopy, and 18S rDNA sequences were used to resolve the phylogenetic position of M. vancouverensis within Rhizocephala. Morphological analysis revealed a complex externa structure with spermatogenic bodies and the presence of a main trunk in the interna. Some of the side branches of the interna invade the host's nerve tissue and are modified into specialized goblet-shaped organs. These invasive rootlets are morphologically similar to the goblet-shaped organs in the family Peltogastridae. Molecular analysis confirmed that the Mycetomorphidae is a sister group to the Peltogastridae. At the same time, peltogastrids were recovered as polyphyletic. Our findings contribute to the understanding of the evolution of parasitic barnacles and highlight the unique adaptations of Mycetomorphidae within the broader context of Rhizocephala. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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