Class Scaphophoda

• Class Scaphopoda ("tusk shells")
• • Tusk-shaped, conical shell open at both ends
• • Presence of anterior, threadlike, adhesive feeding tentacles (captacula)
• • Live on soft substrates offshore(subtidal)
• • Shell size: 0.5- 15 cm in length (members of Order Dentaliida are larger than those of Order Gadilida)
• • Circulatory system is rudimentary (without heart and blood vessels; blood is found in sinuses)
• • Dioecious; external fertilization; trochophore and veliger larva
• Nakabaon na shell

  ANIMAL IN ITS NATURAL HABITAT

  
• Order Dentaliida/ Fam. Dentaliidae

  Dentalium longitrosum

  
• Order Dentaliida/ Fam. Dentaliidae

  • Dentalium elephantinum

  (6.5 cm, Phil.)

  
• Order Dentaliida/ Fam. Dentaliidae

  • Paradentalium infractum
  • Larger tham Galigida
  • sectioning of shell to observe the thickness for identification; ribbed (not smooth) with faint fatigue color

  
• Order Dentaliida/ Fam. Dentaliidae

  • Dentalium elephantinum Linnaeus, 1758
  • Japan, Philippines
  • 100mm

  
• Order Dentaliida/ Fam. Dentaliidae

  • Dentalium aprinum (Linnaeus, 1766)
  • Indo-Pacific
  • 76-95mm

  
• Order Dentaliida/ Fam. Dentaliidae

  • Fissidentalium compressiusculum (Boissevain, 1906)
  • Japan to New Caledonia, E. China Sea to W. Indian Ocean, Philippines;
  • 66mm

  
• Order Dentaliida/ Fam. Dentaliidae

  • Fissidentalium compressiusculum
  • Narrow opening thick shell and thin opposite end where most of animal body is found
  • Fissidentalium - yellowish; ribbed

  
• Order Galigida

  • SUBORDER: GALIDIMORPHA
  • FAMILY: PULSELLIDAE
  • Pulsellum pulsellum lofotense

  
• • (1-3) Gadila elongata, 14.1 mm length
  • (2-3) 10.8 mm length; 
  • (4) Gadila longa, 7.9 mm length; 
  • (5-7) Gadila pandionis, 
  • (5) 10.0 mm length, 
  • (6-7) 13.0 mm length;
  • (8-9) Gadila robusta, 5.9 mm length