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Statements

Subject Item
n2:RIV%2F60077344%3A_____%2F12%3A00377362%21RIV13-GA0-60077344
rdf:type
n12:Vysledek skos:Concept
dcterms:description
The ultrastructure of spermiogenesis and mature spermatozoon in Lytocestus indicus (Cestoda: Lytocestidae) is described; this is the first representative of this group of monozoic, presumably most basal, tapeworms (Eucestoda) from the Indomalayan region to be documented in this manner. Similarly, as in other caryophyllideans, its spermiogenesis involves the formation of a conical differentiation zone with 2 centrioles associated with striated roots and an intercentriolar body. In the course of the process, 1 of the centrioles develops a free flagellum, which fuses with a cytoplasmic protrusion, whereas the other remains oriented in a cytoplasmic bud. Spermiogenesis is also characterized by the presence of electron-dense material in the early stages of spermiogenesis and a slight rotation of the flagellar bud. The mature spermatozoon of L. indicus is a filiform cell tapered at both extremities that lacks mitochondria; its nucleus has parallel disposition to the axoneme and does not reach up to the posterior extremity of the spermatozoon, which is typical for spermatozoa of the type 111 pattern. The new data confirm that caryophyllideans share the same type of spermiogenesis that is considered to be plesiomorphic in the Eucestoda. The existing information on spermatological ultrastructure of 8 members for 3 of 4 caryophyllidean families from different host groups (cyprinids and catostomids, both Cypriniformes, and mochokids and clariids, both Siluriformes) from 4 zoogeographical regions (Palearctic, Neotropic, Ethiopian, and Indomalayan regions) demonstrates great uniformity in spermiogenesis and sperm ultrastructure, which does not reflect different taxonomic position of the species studied. The ultrastructure of spermiogenesis and mature spermatozoon in Lytocestus indicus (Cestoda: Lytocestidae) is described; this is the first representative of this group of monozoic, presumably most basal, tapeworms (Eucestoda) from the Indomalayan region to be documented in this manner. Similarly, as in other caryophyllideans, its spermiogenesis involves the formation of a conical differentiation zone with 2 centrioles associated with striated roots and an intercentriolar body. In the course of the process, 1 of the centrioles develops a free flagellum, which fuses with a cytoplasmic protrusion, whereas the other remains oriented in a cytoplasmic bud. Spermiogenesis is also characterized by the presence of electron-dense material in the early stages of spermiogenesis and a slight rotation of the flagellar bud. The mature spermatozoon of L. indicus is a filiform cell tapered at both extremities that lacks mitochondria; its nucleus has parallel disposition to the axoneme and does not reach up to the posterior extremity of the spermatozoon, which is typical for spermatozoa of the type 111 pattern. The new data confirm that caryophyllideans share the same type of spermiogenesis that is considered to be plesiomorphic in the Eucestoda. The existing information on spermatological ultrastructure of 8 members for 3 of 4 caryophyllidean families from different host groups (cyprinids and catostomids, both Cypriniformes, and mochokids and clariids, both Siluriformes) from 4 zoogeographical regions (Palearctic, Neotropic, Ethiopian, and Indomalayan regions) demonstrates great uniformity in spermiogenesis and sperm ultrastructure, which does not reflect different taxonomic position of the species studied.
dcterms:title
Spermatological characters of monozoic tapeworms (Cestoda: Caryophyllidea), including first data on a species from the Indomalayan catfish Spermatological characters of monozoic tapeworms (Cestoda: Caryophyllidea), including first data on a species from the Indomalayan catfish
skos:prefLabel
Spermatological characters of monozoic tapeworms (Cestoda: Caryophyllidea), including first data on a species from the Indomalayan catfish Spermatological characters of monozoic tapeworms (Cestoda: Caryophyllidea), including first data on a species from the Indomalayan catfish
skos:notation
RIV/60077344:_____/12:00377362!RIV13-GA0-60077344
n12:predkladatel
n13:ico%3A60077344
n4:aktivita
n17:P n17:Z
n4:aktivity
P(GA524/08/0885), P(GAP506/10/1994), P(GBP505/12/G112), P(GD206/09/H026), Z(AV0Z60220518)
n4:cisloPeriodika
2
n4:dodaniDat
n7:2013
n4:domaciTvurceVysledku
n19:7130570 Ash, Anirban Levron, Céline
n4:druhVysledku
n14:J
n4:duvernostUdaju
n20:S
n4:entitaPredkladatele
n5:predkladatel
n4:idSjednocenehoVysledku
170415
n4:idVysledku
RIV/60077344:_____/12:00377362
n4:jazykVysledku
n9:eng
n4:klicovaSlova
GLARIDACRIS-CATOSTOMI COOPER; WENYONIA-VIRILIS WOODLAND; EUBOTHRIUM-CRASSUM BLOCH; SPERM ULTRASTRUCTURE; SPERMIOGENESIS; PLATYHELMINTHES; SPERMATOZOA; EUCESTODA; SPERMATOGENESIS; PHYLOGENY
n4:klicoveSlovo
n8:WENYONIA-VIRILIS%20WOODLAND n8:GLARIDACRIS-CATOSTOMI%20COOPER n8:PLATYHELMINTHES n8:EUBOTHRIUM-CRASSUM%20BLOCH n8:SPERMIOGENESIS n8:SPERM%20ULTRASTRUCTURE n8:SPERMATOGENESIS n8:PHYLOGENY n8:EUCESTODA n8:SPERMATOZOA
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[F69406BFF0C4]
n4:nazevZdroje
Journal of Parasitology
n4:obor
n6:GJ
n4:pocetDomacichTvurcuVysledku
3
n4:pocetTvurcuVysledku
4
n4:projekt
n10:GD206%2F09%2FH026 n10:GA524%2F08%2F0885 n10:GBP505%2F12%2FG112 n10:GAP506%2F10%2F1994
n4:rokUplatneniVysledku
n7:2012
n4:svazekPeriodika
98
n4:tvurceVysledku
Scholz, Tomáš Levron, Céline Yoneva, A. Ash, Anirban
n4:wos
000303275700029
n4:zamer
n16:AV0Z60220518
s:issn
0022-3395
s:numberOfPages
8
n18:doi
10.1645/GE-2794.1