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      Redescription of the Siamese shield leech Placobdelloides siamensis with new host species and geographic range Translated title: Redescription de la sangsue Placobdelloides siamensis, avec nouvelles espèces d’hôtes et nouvelle aire de répartition géographique

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      Parasite

      EDP Sciences

      Placobdelloides, Glossiphoniidae, Hirudinea, Clitellata, Leech, Snail-eating turtle, Malayemys, Bangkok, Thailand

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          Abstract

          The Siamese shield leech Placobdelloides siamensis (Oka, 1917) Sawyer, 1986 (Euhirudinea: Glossiphoniidae) was collected from five new host species, Southeastern Asian Box Turtle ( Cuora amboinensis), Yellow-headed Temple Turtle ( Heosemys annandalii), Malayan Snail-eating Turtle ( Malayemys macrocephala), Mekong Snail-eating Turtle ( M. subtrijuga), and Khorat Snail-eating Turtle ( M. khoratensis) and was found for the first time in Udon Thani, Thailand. Examination of live leeches provided, for the first time, data on coloration and the combination of parental care behavior, both carrying cocoons and attaching cocoons to the substrate. This species was separated from its congeners based on the following characters: one pair of eyes; spines at proboscis subterminal; mouth terminal on oral sucker; absent plaque in neck region; gonopores located in furrow and separated by two annuli; distinctly triannulated mid-body segments; crop with seven pairs and branched caeca; caudal sucker slightly over half of maximum body width; and strongly dorsal papillae. Phylogenetic relationships based on the COI and ND1 genes were clarified and demonstrated that the species is distinct from others. The original description was amended and the taxonomic history is discussed.

          Translated abstract

          La sangsue Placobdelloides siamensis (Oka, 1917) Sawyer, 1986 (Euhirudinea: Glossiphoniidae) a été collectée chez cinq nouvelles espèces d’hôtes, les tortues Cuora amboinensis, Heosemys annandalii, Malayemys macrocephala, M. subtrijuga et M. khoratensis, et a été trouvée pour la première fois à Udon Thani, en Thaïlande. L’examen des sangsues vivantes a fourni pour la première fois des données sur la coloration et la combinaison du comportement des parents en matière de protection parentale, qui à la fois portent des cocons et les fixent au substrat. Cette espèce a été séparée de ses congénères selon les caractères suivants: une paire d’yeux ; épines au proboscis subterminal ; bouche terminale sur la ventouse orale ; plaque absente dans la région du cou ; gonopores situés dans un sillon et séparés par deux anneaux ; segments du milieu du corps distinctement triannulés ; jabot avec sept paires de caeca ramifiés ; ventouse caudale légèrement au-dessus de la moitié de la largeur maximale du corps ; et papilles fortement dorsales. Les relations phylogénétiques basées sur les gènes COI et ND1 ont été clarifiées et ont démontré que l’espèce est distincte des autres. La description originale a été modifiée et l’histoire taxonomique est discutée.

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          Most cited references 20

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          Phylogeny of the leech family Glossiphoniidae based on mitochondrial gene sequences and morphological data.

          The phylogenetic relationships of the Glossiphoniidae (Rhynchobdellida) were investigated using morphological characters and the mitochondrial genes cytochrome c oxidase subunit I and nicotinamide adenine dinucleotide dehydrogenase subunit 1. Thirty-five taxa representing 10 of the 23 currently recognized glossiphoniid genera were sampled, including more than 70% of known North American species, as well as others from Europe, South America, Africa, and a species endemic to Lake Baikal. Outgroup taxa included species from the Piscicolidae and Ozobranchidae. Cladistic analysis resulted in 1 most-parsimonious tree. Subfamily distinctions, i.e., Haementeriinae, Theromyzinae, and Glossiphoniinae, that have been based on eye morphology and reproductive biology are not corroborated. Results also provide insights into several problematic genus-level classifications. For example, relationships of Placobdella and Haementeria are clarified and elimination of Desserobdella may be necessary. Bloodfeeding from vertebrates is seen to be a primitive characteristic that has been lost twice within the clade. The hypothesis that the biannulate leech, Oligobdella biannulata, represents an important transitional form is re-evaluated in a phylogenetic context.
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            Phylogenetic evaluation of systematics and biogeography of the leech family Glossiphoniidae

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              Scientific results of an inquiry into the ecology and economic status of the Nile crocodile (Crocodylus niloticus) in Uganda and Northern Rhodesia

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                Author and article information

                Journal
                Parasite
                Parasite
                parasite
                Parasite
                EDP Sciences
                1252-607X
                1776-1042
                2018
                26 November 2018
                : 25
                : ( publisher-idID: parasite/2018/01 )
                Affiliations
                [1 ] Animal Systematics and Ecology Speciality Research Unit, Department of Zoology, Faculty of Science, Kasetsart University 50 Ngam Wong Wan Road Chatuchak Bangkok 10900 Thailand
                Author notes
                [* ]Corresponding author: fsciwyp@ 123456ku.ac.th
                Article
                parasite180056 10.1051/parasite/2018056
                10.1051/parasite/2018056
                6254108
                30474597
                © K. Chiangkul et al., published by EDP Sciences, 2018

                This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                Page count
                Figures: 6, Tables: 2, Equations: 0, References: 24, Pages: 10
                Categories
                Research Article

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