Amin, Omar M.;
Rodríguez, Sara M.;
Farrer, Solinus;
Fierro, Pablo;
Garcés, Cristóbal;
Rivera, Felipe;
D’Elía, Guillermo
Review of the concept of Profilicollis Meyer, 1931 with a description of Profilicollis rancoensis n. sp. (Acanthocephala: Polymorphidae) from the freshwater crab, Aegla abtao Schmitt, 1942 (Decapoda: Anomura) in Chile, with a key to congeneric species
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Media type:
E-Article
Title:
Review of the concept of Profilicollis Meyer, 1931 with a description of Profilicollis rancoensis n. sp. (Acanthocephala: Polymorphidae) from the freshwater crab, Aegla abtao Schmitt, 1942 (Decapoda: Anomura) in Chile, with a key to congeneric species
Contributor:
Amin, Omar M.;
Rodríguez, Sara M.;
Farrer, Solinus;
Fierro, Pablo;
Garcés, Cristóbal;
Rivera, Felipe;
D’Elía, Guillermo
imprint:
EDP Sciences, 2023
Published in:Parasite
Language:
Not determined
DOI:
10.1051/parasite/2023042
ISSN:
1776-1042
Origination:
Footnote:
Description:
<jats:p><jats:italic>Profilicollis rancoensis</jats:italic> n. sp. is the tenth species of <jats:italic>Profilicollis</jats:italic> Meyer, 1931 which includes 9 other species mostly known from marine decapod crabs and shore birds. Cystacanths of <jats:italic>P. rancoensis</jats:italic> are described from the dominant freshwater crab <jats:italic>Aegla abtao</jats:italic> in Ranco Lake, Chile and are morphologically distinguished from cystacanths of the 9 other species based on a combination of 4 characters. These are body size, number of proboscis hook rows, number of hooks per row, and length of the largest anterior 2–4 hooks. Male and female cystacanths of <jats:italic>P. rancoensis</jats:italic> are 2.10–3.33 mm long having an ovoid proboscis with 14 rows of 6–7 hooks per row, with the largest anterior 2–4 hooks being 105–110 micrometers long; the anterior trunk has many small spines in 70–80 concentric rings, each with 50–60 spines around them; hook roots are simple, directed posteriorly, about as long as the blades anteriorly with unremarkable anterior manubria; the cephalic ganglion are in mid-receptacle just anterior to the level of the anterior trunk; the lemnisci are long and slender; the testes are in the anterior trunk, posterior trunk, or one in each; the primordia of 2 tubular cement glands are evident; strong bundles of fibers link the anterior and posterior trunk; and the posterior trunk has a corrugated surface cuticula. Molecular analysis (COI and 18S) sequences coincided with the morphology and support its taxonomy. The phylogenetic profile revealed that <jats:italic>P. rancoensis</jats:italic> n. sp. fell into the <jats:italic>Profilicollis</jats:italic> clade. Both sequences showed low genetic variation, and three different haplotypes were found. The new species was more closely related to <jats:italic>P. botulus</jats:italic> (Van Cleave, 1916) Witenberg, 1932 than to other <jats:italic>Profilicollis</jats:italic> species.</jats:p>