Microscopic animals that live attached to the grains of marine sediments.

Key to Abbreviations Used in Higgins & Kristensen 1986

• ac anal cone
• ad apodeme on the mouth cone
• af anal field
• an anus
• ap anal plate
• ar anal ridge
• at accessory tooth (cl)
• ba bar-shaped structure of midventral plica
• bc buccal canal
• bg buccal canal gland
• br brain
• bt basal plate of toe
• cl claw-tipped spinoscalid (sr₄)
• co collar
• cp collar pore
• cs clavoscalid (sr₁)
• cs₁ ventral clavoscalid
• cs₂ dorsal clavoscalid
• ct claw-tip
• D dorsal
• do double-organ
• ed edge of lorica
• ed₁ edge of larval lorica
• ed₂ edge of adult lorica
• es esophagus
• ex larval exuvium
• fl flosculus (Pliciloricus-type)
• fl₁ anterior flosculus
• fl₂ posterior flosculus
• gu gut
• ha hair
• ho hook-shaped scalid of larval exuvium
• ia internal armature of larval buccal canal
• in introvert
• in₁ introvert of larval exuvium
• in₂ introvert of adult exuvium
• lc larval closing apparatus
• lo lorica
• lo₁ lorica of larval exuvium
• lo₂ lorica of adult exuvium
• Ir₁ primary double ridge of lorica
• Ir₂ secondary double ridge of lorica
• Is₁ anterolateral seta
• Is₂ anteroventral seta
• mc mouth cone
• mc₁ first region of mouth cone
• mc₂ second region of mouth cone
• mc₃ third region of mouth cone
• mh middorsal hook (modified sr₉)
• mo molting body
• mp middorsal plate
• mr mucro
• ms midventral setae of mouth cone
• mt mouth tube
• mu muscle
• mv midventral scalid
• nf flosculus (Nanaloricus-type)
• ne nephridiopore(?)
• or oral ridge
• os oral stylet
• ot oral tooth
• ph pharynx bulb
• pi₁ plica
• pi₂ midventral modified plica
• po pore on trichoscalid plate
• ps penile spine(?)
• pt toe gland pore
• re ridge
• ri transverse ridge of lorica
• ro rosette structure
• ru ruff
• sc scalid
• se₁ posterodorsal seta
• se₂ posterolateral seta
• se₃ posteroterminal seta
• sp spine on spinoscalid
• sr₁-sr₉ scalid row 1-9
• ss spinoscalid
• su sculpture of lorica
• te testis
• th thorax