Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Morphology and molecular characterization of Demidospermus spirophallus n. sp., D. prolixus n. sp (Monogenea: Dactylogyridae) and a redescription of D. anus in siluriform catfish from Brazil

Full text
Author(s):
Franceschini, L. [1] ; Zago, A. C. [1] ; Muller, M. I. [1] ; Francisco, C. J. [1] ; Takemoto, R. M. [2] ; da Silva, R. J. [1]
Total Authors: 6
Affiliation:
[1] Sao Paulo State Univ Unesp, Inst Biosci, BR-18618689 Botucatu, SP - Brazil
[2] State Univ Maringa UEM, Limnol Ichthyol & Aquaculture Res Ctr Nupelia, BR-87020900 Maringa, Parana - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF HELMINTHOLOGY; v. 92, n. 2, p. 228-243, MAR 2018.
Web of Science Citations: 11
Abstract

The present study describes Demidospermus spirophallus n. sp. and Demidospermus prolixus n. sp. (Monogenea, Dactylogyridae) from the siluriform catfish Loricaria prolixa Isbrucker \& Nijssen, 1978 (Siluriformes, Loricariidae) from the state of Sao Paulo, Brazil, supported by morphological and molecular data. In addition, notes on the circumscription of the genus with a redescription of Demisdospermus anus are presented. Demidospermus spirophallus n. sp. differed from other congeners mainly because of the morphology of the male copulatory organ (MCO), which exhibited 2 1/2 counterclockwise rings, a tubular accessory piece with one bifurcated end and a weakly sclerotized vagina with sinistral opening. Demidospermus prolixus n. sp. presents a counterclockwise-coiled MCO with 1 1/2 rings, an ovate base, a non-articulated groove-like accessory piece serving as an MCO guide, two different hook shapes, inconspicuous tegumental annulations, a non-sclerotized vagina with sinistral opening and the absence of eyes or accessory eyespots. The present study provides, for the first time, molecular characterization data using the partial ribosomal gene (28S) of two new species of Demidospermus from Brazil (D. spirophallus n. sp. and D. prolixus n. sp.), and Demidospermus anus from Loricariichthys platymetopon Isbrucker \& Nijssen, 1979 collected in the Upper Parana River floodplain, Brazil. Additionally, a revision of the species composition of this genus and others that occur in catfish is proposed to elucidate problems with their circumscription. The Brazilian species of Demidospermus clustered together as sister taxa among Neotropical dactylogyrids from siluriforms. The morphological characterization of D. spirophallus n. sp. and D. prolixus n. sp., and the molecular data of the three species in the present study will extend knowledge about this monogenean genus from the Neotropical region, and provide new information for future phylogeny studies. (AU)

FAPESP's process: 12/07850-7 - Biodiversity of the helminths of Loricariidae fishes (Teleostei: Siluriformes) from Sapucaí-Mirim River, Brazil
Grantee:Lidiane Franceschini
Support Opportunities: Scholarships in Brazil - Doctorate