NDLI: An alternative classification of trypanorhynch cestodes considering the tentacular armature as being of limited importance

Content Provider	Springer Nature Link
Author	Palm, Harry W.
Copyright Year	1997
Abstract	Based on a light- and scanning electron microscopical study of scolex morphology, tentacles and surface structures of 31 trypanorhynch species, an alternative classification of the trypanorhynch cestodes, adults, plerocerci and postlarvae, is presented. The arrangement of the tentacular armature is no longer used as a distinguishing feature for four different superfamilies. Instead, the presence or absence of ciliated pits and prebulbular organs is used to define three superfamilies: Tentacularioidea Poche, 1926; Otobothrioidea Dollfus, 1942; and Eutetrarhynchoidea Guiart, 1927. A total of 12 families are defined by the characters: the presence/absence of blastocysts, the number of bothridia and the reduction of the rhyncheal apparatus, together with a new character, complete rows of tentacular hooks (homeoacanth and heteroacanth typica) versus rows of hooks partly reduced (heteroacanth atypica and poeciloacanth). Of the 19 families previously accepted, 10 are retained (Eutetrarhynchidae, Gilquiniidae, Lacistorhynchidae, Mixodigmatidae, Otobothriidae, Paranybeliniidae, Pterobothriidae, Shirleyrhynchidae, Sphyriocephalidae and Tentaculariidae, all sensu nov.); one family is reinstated (i.e. Aporhynchidae Poche, 1926 sensu nov.) and a new one is added (i.e. Pseudotobothriidae n. fam.). Advantages of this alternative classification of trypanorhynch cestodes are: (i) the resolution of incongruities and questions caused by the use of the tentacular armature to distinguish superfamilies; (ii) the criteria for the establishment of higher taxa, superfamilies and families are clearly defined; (iii) with the findings of new species with different character combinations, this system can be enlarged up to 4 superfamilies and 48 families without loosing its stability; and (iv) all existing genera are easily re-assigned to the superfamilies and families.
Starting Page	81
Ending Page	92
Page Count	12
File Format	PDF
ISSN	01655752
Journal	Systematic Parasitology
Volume Number	37
Issue Number	2
e-ISSN	15735192
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1997-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Plant Sciences Animal Anatomy Morphology Histology
Content Type	Text
Resource Type	Article
Subject	Parasitology

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