Two new species of ancyrocephalid monogeneans from Lethrinus rubrioperculatus Sato (Perciformes: Lethrinidae) off New Caledonia, with the proposal of Lethrinitrema n. g

Lethrinitrema gibbus n. g., n. sp. and L. dossenus n. sp. are described from the fish Lethrinus rubrioperculatus Sato collected off New Caledonia, South Pacific. Members of Lethrinitrema n. g. (Ancyrocephalidae) are characterised by having two pyriform haptoral reservoirs and ventral anchors with la...

Full description

Saved in:
Bibliographic Details
Published in:Systematic parasitology 2011-02, Vol.78 (2), p.123-138
Main Authors: Lim, L. H. S, Justine, Jean-Lou
Format: Article
Language:English
Subjects:
Agriculture
Ancyrocephalidae
Animal Anatomy
Animal Ecology
Animal Systematics/Taxonomy/Biogeography
Animals
Biochemistry, Molecular Biology
Biomedical and Life Sciences
Gonads - anatomy & histology
Haliotrema
Histology
Lethrinidae
Lethrinus
Lethrinus rubrioperculatus
Life Sciences
Morphology
New Caledonia
Perciformes
Perciformes - parasitology
Platyhelminths - anatomy & histology
Platyhelminths - classification
Zoology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Lethrinitrema gibbus n. g., n. sp. and L. dossenus n. sp. are described from the fish Lethrinus rubrioperculatus Sato collected off New Caledonia, South Pacific. Members of Lethrinitrema n. g. (Ancyrocephalidae) are characterised by having two pyriform haptoral reservoirs and ventral anchors with lateral grooves. The elongate tubular distal end of each reservoir bifurcates, draining into a superficial lateral groove on each side of the ventral anchors. The haptoral reservoirs are postulated to store secretory products which assist in attachment to the host. Lethrinitrema spp. also possess tandem gonads, a male copulatory organ without an accessory piece or with thinly sclerotised accessory piece, and a dextrolateral, non-sclerotised vaginal bulb. The two new species have small, poorly demarcated haptors with small haptoral armament and a crown-like piece on the tip of the inner root of the ventral anchors. They differ from each other in the shape and size of the ventral bar and male copulatory organ (40-45 μm in length in L. gibbus vs 24-30 μm in L. dossenus). Three other species, previously included in Haliotrema Johnston & Tiegs, 1922, are transferred to Lethrinitrema, i.e. L. chrysostomi (Young, 1968) n. comb., L. fleti (Young, 1968) n. comb. (both briefly redescribed from paratypes) and L. lethrini (Yamaguti, 1937) n. comb. All species of Lethrinitrema parasitise Lethrinus spp. (Lethrinidae), and there is evidence for the existence of further Lethrinitrema spp. on Lethrinus spp. in the Indo-Pacific region.
ISSN:0165-5752
1573-5192
DOI:10.1007/s11230-010-9283-6