Marine Biodiversity and Ecosystem Functioning
EU Network of Excellence

 
Main Menu

· Home
· Contacts
· Data Systems
· Documents
· FAQ
· Links
· MarBEF Open Archive
· Network Description
· Outreach
· Photo Gallery
· Quality Assurance
· Register of Resources
· Research Projects
· Rules and Guidelines
· Training
· Wiki
· Worldconference

 

Register of Resources (RoR)

 People  |  Datasets  |  Literature  |  Institutes  |  Projects 

[ report an error in this record ]basket (0): add | show Print this page

Phylogeny of the Holothuriidae (Echinodermata: Holothuroidea) inferred from morphology
Appeltans, W. (2002). Phylogeny of the Holothuriidae (Echinodermata: Holothuroidea) inferred from morphology. MSc Thesis. Vrije Universiteit Brussel: Brussel. 94 pp.

Thesis info:

Available in  Author 
Document type: Dissertation

Keywords
    Animal morphology; Cladistics; Evolution; Phylogeny; Taxonomy; Holothuriidae Burmeister, 1837 [WoRMS]; Marine

Author  Top 
  • Appeltans, W., more

Abstract
    Despite the efforts of numerous notable taxonomists, the taxonomy and systematics of the grand family Holothuriidae (Holothuroidea: Aspidochirotida) remain vague for some groups. As such, a cladistically substantiated phylogeny based upon clearly defined morphological characters can bring insights into the evolution of the holothuriids. Thus, here I present a phylogeny of the group based on morphological characters. Cladistic analysis was performed by an heuristic search under the maximum-parsimony optimality criterion. 27 ingroup taxa, representing all currently recognized genera and subgenera and 6 outgroup taxa, belonging to the closely related Stichopodidae and deep-sea Synallactidae, were scored for a total of 68 characters concerning gross external and internal morphology and ossicle assemblage in the body wall, the tentacles and the tube feet. Moreover, often ignored body parts such as longitudinal muscles, cloacal muscles and anal papillae were examined for the presence of ossicles. Preliminary analysis revealed that for the synallactid genus Mesothuria, the species used as outgroup (e.g. M. sufflava) clustered in the ingroup. As it is here argued that this is the result of erroneous identification, Mesothuria was omitted as outgroup taxon. On the other hand, two genera of the Stichopodidae successfully lent themselves as outgroup. For the Holothuriidae, the monophyly of the genera Actinopyga, Bohadschia and Labidodemas was confirmed. Labidodemas, however, clustered in the paraphyletic lineage Holothuria. The enigmatic genus Pearsonothuria turned out to be the sister group of Actinopyga. From the resulting phylogeny, inferences on character evolution are made.

Pictures Top | Author 


If any information here appears to be incorrect, please contact us
Back to Register of Resources
 
Quick links

MarBEF WIKI

Erasmus Mundus Master of Science in Marine Biodiversity and Conservation (EMBC)
Outreach

Science
Responsive Mode Programme (RMP) - Marie Nordstrom, copyright Aspden Rebecca

WoRMS
part of WoRMS logo

ERMS 2.0
Epinephelus marginatus Picture: JG Harmelin

EurOBIS

Geographic System

Datasets

 


Web site hosted and maintained by Flanders Marine Institute (VLIZ) - Contact data-at-marbef.org