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From development to taxonomy: the case of Sciaenacotyle pancerii (Monogenea: Microcotylidae) in the Mediterranean meagre
Villar-Torres, M.; Montero, F.E.; Merella, P.; Garippa, G.; Cherchi, S.; Raga, J.A.; Repullés-Albelda, A. (2022). From development to taxonomy: the case of Sciaenacotyle pancerii (Monogenea: Microcotylidae) in the Mediterranean meagre. Parasitology 149(13): 1695-1701. https://dx.doi.org/10.1017/s0031182022000865
In: Parasitology. Cambridge University Press: London. ISSN 0031-1820; e-ISSN 1469-8161
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| Trefwoorden |
Polyopisthocotylea [WoRMS]; Sciaenidae Cuvier, 1829 [WoRMS]
Marien/Kust |
| Author keywords |
Aquaculture; clamp pair number; haptoral asymmetry; morphological variability; Polyopisthocotylea; Sciaenidae; species identification |
| Auteurs | | Top |
- Villar-Torres, M.
- Montero, F.E.
- Merella, P.
- Garippa, G.
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- Cherchi, S.
- Raga, J.A.
- Repullés-Albelda, A.
|
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| Abstract |
The microcotylid Sciaenacotyle pancerii is a pathogenic monogenean infecting Argyrosomus regius, a candidate for species diversification in the Mediterranean aquaculture. Life-history stages of S. pancerii commonly co-occur in field infections, but to date, morphological data have only been provided for oncomiracidia and adults although identifying life-history stages can be useful in infection management. A total of 114 specimens of S. pancerii were analysed to characterize the developmental events and to assess morphological and morphometric variations before and after maturity. The post-larval development of S. pancerii is characterized by: expansion and bifurcation of the gut, loss of the larval haptor, protandrous development of the genitalia and vitellaria formation. The size variability of larval hooks, hamuli and germanium of S. pancerii is firstly reported and dimensional ranges of parasite body, haptor, testes, posteriormost clamps and eggs are widened. The size of most of the diagnostic features of S. pancerii significantly increases after parasite maturity and therefore, only those specimens with more than 116 clamps should be considered for minimising development-related variability in size. The high number of clamps, their fast development and the asymmetry in their size and arrangement suggest that S. pancerii may use a mixed attachment strategy between the closely related microcotylids and heteraxinids. This combination of features may be host related and linked to the gill structure of the sciaenid fish and the phylogenetic position of the genus Sciaenacotyle; distant from other microcotylids while close to heteraxinid species. |
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