Data about Pycnogonida

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Physical Description

 
sexual dimorphism
  • 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.
    http://www.owl-ontologies.com/unnamed.owl#Dimorphism
Additional detail
appendages
  • appendages
    appendages differ between males and females. Includes the number, size and shape of locomotory and sensory appendages such as antennae, legs, wings, and fins, as well as non-genital appendages modified to act as intromittent organs. Tail dimorphisms are not included.
    http://eol.org/schema/terms/appendagesDimorphic
Fairbairn, 2013  

Life History and Behavior

 
reproduction
Additional detail
dioecious
  • dioecious
    Dioecy (Greek: "two households"; adjective form: dioecious) is characterised by a species having distinct male and female organisms.
    http://eol.org/schema/terms/dioecious
Fairbairn, 2013  

Evolution and Systematics

 
first appearance (older bound)
Additional detail
433.4 million years ago
The Paleobiology Database  
 
first appearance (younger bound)
Additional detail
427.4 million years ago
The Paleobiology Database  
 
last appearance (older bound)
Additional detail
409.1 million years ago
The Paleobiology Database  
 
last appearance (younger bound)
Additional detail
402.5 million years ago
The Paleobiology Database  

Conservation

 
extinction status
Additional detail
extant
The Paleobiology Database  

Notes

 
percent species currently described min
Additional detail
37
Appeltans et al, 2012  
 
percent species currently described max
Additional detail
53
Appeltans et al, 2012  
 
percent synonyms
Additional detail
3
Appeltans et al, 2012  
 
described (accepted)
Additional detail
1,307
Appeltans et al, 2012  
 
total unknown species (expert opinion) min
Additional detail
1,179
Appeltans et al, 2012  
 
total unknown species (expert opinion) max
Additional detail
2,250
Appeltans et al, 2012  
 
undescribed species present in museum collections min
Additional detail
150
Appeltans et al, 2012  
 
undescribed species present in museum collections max
Additional detail
500
Appeltans et al, 2012  
 
undiscovered morphospecies (not yet collected) min
Additional detail
979
Appeltans et al, 2012  
 
undiscovered morphospecies (not yet collected) max
Additional detail
1,650
Appeltans et al, 2012  
 
undiscovered species (molecular cryptic) min
Additional detail
50
Appeltans et al, 2012  
 
undiscovered species (molecular cryptic) max
Additional detail
100
Appeltans et al, 2012  
 
percent surveyed species not yet known to science
Additional detail
0.07
Appeltans et al, 2012  
Additional detail
0.14
Appeltans et al, 2012  
Additional detail
0.15
Appeltans et al, 2012  
Additional detail
0.17
Appeltans et al, 2012  
Additional detail
0.17
Appeltans et al, 2012  
Additional detail
0.19
Appeltans et al, 2012  
Additional detail
0.2
Appeltans et al, 2012  
Additional detail
0.23
Appeltans et al, 2012  
Additional detail
0.24
Appeltans et al, 2012  
Additional detail
0.3
Appeltans et al, 2012  
Additional detail
0.4
Appeltans et al, 2012  

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