Data about Ophiuroidea

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Physical Description

Data about Ophiuroidea
  • sexual dimorphism
    Sexual dimorphism is a phenotypic difference between males and females of the same species. The prototypical example is for differences in characteristics of reproductive organs. Other possible examples are for secondary sex characteristics, body size and morphology, ornamentation and behavior.
sexual dimorphism
Additional detail dwarf males Fairbairn, 2013  
Additional detail female larger Fairbairn, 2013  
Additional detail genital opening
  • genital opening
    genital opening differs between males and females
Fairbairn, 2013  
Additional detail integument
  • integument
    integument differs between males and females. Includes the size, number, distribution or shape of cilia, scales, spines, hooks, bristles, feathers, hair, horns and teeth. Although not integmental structures, the antlers of mammals are included in this category because they are analogous in function to the sexually-selected horns and spines of other animals.
Fairbairn, 2013  


Data about Ophiuroidea
δ13C mean
Additional detail -17.9 Reid et al, 2012  
trophic guild
Additional detail surface deposit feeder
  • surface deposit feeder
    An organism which obtains food primarily by surface deposit feeding. Reid WDK, Wigham BD, McGill RAR, Polunin NVC (2012) Elucidating trophic pathways in benthic deep-sea assemblages of the Mid-Atlantic Ridge north and south of the Charlie-Gibbs Fracture Zone. Mar Ecol Prog Ser 463:89-103. doi:10.3354/meps09863
Reid et al, 2012  
δ15N mean
Additional detail 11.35 Reid et al, 2012  
δ34S mean
Additional detail 18.95 Reid et al, 2012  

Life History and Behavior

Data about Ophiuroidea
Additional detail dioecious
  • dioecious
    Dioecy (Greek: "two households"; adjective form: dioecious) is characterised by a species having distinct male and female organisms.
Fairbairn, 2013  
Additional detail sequential hermaphrodite
  • sequential hermaphrodite
    Some members of this lineage are sequential hermaphrodites; they are born as one sex, but can later change into the opposite sex.
Fairbairn, 2013  
Additional detail simultaneous hermaphrodite
  • simultaneous hermaphrodite
    Some members of this lineage are simultaneous hermaphrodites; a condition of hermaphroditic animals (and plants) in which the reproductive organs of both sexes are present and functional at the same time.
Fairbairn, 2013  


Data about Ophiuroidea
percent species currently described min
Additional detail 71 Appeltans et al, 2012  
max Additional detail 79 Appeltans et al, 2012  
percent synonyms
Additional detail 34 Appeltans et al, 2012  
described (accepted)
Additional detail 2,064 Appeltans et al, 2012  
total unknown species (expert opinion) min
Additional detail 560 Appeltans et al, 2012  
max Additional detail 850 Appeltans et al, 2012  
undescribed species present in museum collections min
Additional detail 260 Appeltans et al, 2012  
max Additional detail 300 Appeltans et al, 2012  
undiscovered morphospecies (not yet collected) min
Additional detail 200 Appeltans et al, 2012  
max Additional detail 400 Appeltans et al, 2012  
undiscovered species (molecular cryptic) min
Additional detail 100 Appeltans et al, 2012  
max Additional detail 150 Appeltans et al, 2012  
percent surveyed species not yet known to science min
Additional detail 8 Appeltans et al, 2012  
Additional detail 0.02 Appeltans et al, 2012  
Additional detail 0.07 Appeltans et al, 2012  
max Additional detail 0.31 Appeltans et al, 2012  


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