siphuncle การใช้

• Whorl sections are subrectangular, sutures sinuous, the siphuncle subcentral.
• As for all clymeniids, the siphuncle is along the dorsum.
• The siphuncle in each is slightly removed from the ventral margin.
• Members of the Trocholitidae vary in whorl section and siphuncle position.
• The siphuncle is ventral and tubular . ( 1964 . ).
• The siphuncle is narrow, located slightly ventral of the center.
• The Siphuncle is large, displaced slightly ventral from the center.
• The siphuncle, which is small, runs through the middle.
• These are more continuous on the ventral side of the siphuncle.
• In both the siphuncle is mostly composed of thin connecting rings.
• Where known, the siphuncle tends to be central to subcentral.
• The siphuncle swelling at the apex is subtriangular in longitudinal profile.
• The siphuncle is small, subcentral, and with recumbent necks.
• It differs in having a subcentral siphuncle with somewhat inflated segments.
• The siphuncle is subcentral, ventral of the dorsal septal flexture.
• The siphuncle is subcentral with segments slightly expanded into the chambers.
• The siphuncle is ventral, tubular and free of organic deposits.
• The siphuncle is ventral, close to the longitudinally concave side.
• Position and structure of the siphuncle were unknown as of 1964.
• The siphuncle is ventral, marginal, with continuous actinosiphonate lamellae.