顎胃動物門

Gnathostomulida

Body symmetry

• Namigai et al 2014: 雙側對稱

body shape

• Littlewood et al 1998: vermiform

cellularity

• Cellularity and growth form: multicellular

described accepted species

• Appeltans et al: 98

diet includes

• Brusca and Brusca, 2003: bacteria (成體)
• Brusca and Brusca, 2003: fungi (成體)

habitat

• Brusca and Brusca, 2003: 深海沉積物 (成體)
• Littlewood et al 1998: 海洋底棲

known marine species

• Appeltans et al: 98

motility

• Littlewood et al 1998: 主動移動

number of new species decribed 1999-2008

• Appeltans et al: 9

number of public records in bold

• Barcode of Life Data Systems: 16

percent of marine species currently described

• Appeltans et al: 31

percent synonyms among marine species

• Appeltans et al: 10

sexual system

• Fairbairn 2013: hermaphrodite

total species (expert opinion)

• Appeltans et al: 313 (最小)
• Appeltans et al: 318 (最大)

total unknown marine species

• Appeltans et al: 220 (最大)
• Appeltans et al: 215 (最小)

trophic guild

• Brusca and Brusca, 2003: microphage (成體)

undescribed marine species present in museum collections

• Appeltans et al: 15 (最小)
• Appeltans et al: 20 (最大)

undiscovered marine morphospecies

• Appeltans et al: 200