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Paraconcinnum leirsi n. sp. (Trematoda, Dicrocoeliidae) from rodents in Tanzania and its phylogenetic position within the dicrocoelids

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Author(s): Alexis Ribas | Rhodes H Makundi | Jöelle Goüy de Bellocq

Journal: African Zoology
ISSN 1562-7020

Volume: 47;
Issue: 2;
Date: 2013;
Original page

Keywords: Acomys | Dicrocoeliidae | Gerbilliscus | Paraconcinnum | 18S rDNA gene

ABSTRACT
The trematode Paraconcinnum leirsi n. sp. (Dicrocoeliidae) is described from two rodent species, the African gerbil, Gerbilliscus vicinus and Southern Africa spiny mouse, Acomys spinosissimus from Tanzania. It differs from the single known species of the genus Paraconcinnum, P. hylomisci found in the rodent Hylomyscus stella in the Democratic Republic of the Congo, by morphological and metrical characters. Additionally, a molecular study was performed sequencing the near complete 18S rDNA gene of P. leirsi n. sp. to assess its phylogenetic position within the Dicrocoeliidae. The resulting estimate of evolutionary divergence between Paraconcinnum leirsi and other dicrocoelids was 1.60 ± 0.22 % base differences per site. The phylogenetic analysis shows the new species is clearly a dicrocoelid falling in a cluster with the genera Corrigia, Lyperosomum and (Concinnum+Eurytrema) but phylogenetic relationships among these genera are not well resolved. This is the first dicrocoelid reported from rodents in Eastern Africa.

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