Sea Spiders

Pycnogonida

Body symmetry

• Namigai et al 2014: bilaterally symmetric

cellularity

• Cellularity and growth form: multicellular

described accepted species

• Appeltans et al: 1307

ecomorphological guild

• Queirós et al 2013: epifaunal
• Paleobiology Database: epifaunal (adult)

extinction status

• Paleobiology Database: extant

first appearance

• Paleobiology Database: 433.4 million years ago (max)
• Paleobiology Database: wenlock epoch

habitat

• World Register of Marine Species: marine benthic
• World Register of Marine Species: marine benthic

last appearance

• Paleobiology Database: 402.5 million years ago (min)
• Paleobiology Database: lower devonian epoch

motility

• Queirós et al 2013: actively mobile
• Paleobiology Database: actively mobile (adult)

number of dna records in ggbn

• GGBN data coverage: 691

number of fossil occurrences

• Paleobiology Database: 4

number of specimens in ggbn

• GGBN data coverage: 698

percent of marine species currently described

• Appeltans et al: 37 (min)
• Appeltans et al: 53 (max)

percent surveyed species not yet known to science

• Appeltans et al: 0.15
• Appeltans et al: 0.2
• Appeltans et al: 0.17
• Appeltans et al: 0.14
• Appeltans et al: 0.07

percent synonyms among marine species

• Appeltans et al: 3

skeleton structure

• Mineralogy: exoskeleton

total unknown marine species

• Appeltans et al: 1179 (min)
• Appeltans et al: 2250 (max)

trophic guild

• World Register of Marine Species: parasite
• World Register of Marine Species: omnivore
• Brusca and Brusca, 2003: carnivore (adult)

undescribed marine species present in museum collections

• Appeltans et al: 500 (max)
• Appeltans et al: 150 (min)

undiscovered marine morphospecies

• Appeltans et al: 1650 (max)
• Appeltans et al: 979 (min)

undiscovered species (molecular cryptic)

• Appeltans et al: 100 (max)
• Appeltans et al: 50 (min)