siphuncle


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Related to siphuncle: spermatophore

siphuncle

  1. the honeydew tube of an aphid.
  2. the strands of living tisue present in all the compartments of the shell of a NAUTILOID.
References in periodicals archive ?
Although Kroger (2006) placed Hedstroemoceras in Pseudorthocerida, the shape of the shell and the position and form of the siphuncle suggest rather an affinity with oncocerids (D.
The first section illustrates the differences between nautilids and ammonoids in respect to shell shape, ornamentation, body chamber, phragmocone, septa, the siphuncle and buoyancy regulation, apparatus, radula and diet, arms and tentacles, eyes, development, mode of life, reproduction, dimorphism, stability, swimming, pathology and teratology, taphonomy, biostratigraphy, mass extinctions, and more.