Zebrafish Anatomical Dictionary

Structure description: Hypurals

by Paula Mabee and Nathan C. Bird

Name: Hypurals

Abbreviation: hyp

Synonyms: "Hypuralia" used by Ferreri et al. (2000); non-standard ichthyological term.

Figures:

hypurals (larval, 4mm)

hypurals (larval, 5.8mm)

hypurals (adult)

Description: The cartilaginous precursor of hypural 1 appears ventral to the posterior tip of the notochord. Remaining hypurals (2-5) added posterior to hypural 1. The hypurals will support fin rays of the caudal fin.

Homologues:

• Human: none
• Mouse: none
• Chicken: none
• Frog: none
• Fly: none

Stages:

• First appears at: hyp1: early larval, 3.9 mm (notochord length); hyp2: early larval 4.1 mm; hyp3: early larval 4.4 mm (notochord length); hyp4: early larval, 4.8mm (notochord length); hyp5: early larval 5.0 mm (notochord length)
• Disappears (or changes name)by: ossifies later in development, present in adult

Parents (forms from): unspecified

Children:

• Presumptive (thought to give rise to): present in adult
• Anlage (known to give rise to): present in adult

Group (member of):

• Anatomical (group member): caudal fin skeleton
• Functional (group member): unspecified

Markers:

• mRNA:
  
• Antibodies:
  
• Other: Alcian Blue (cartilage) and Alizarin Red (bone), as per the method of Dinkerkus and Uhler (1977) with modifications by Potthoff (1985).

Publications:

• Primary: Mabee, P.M. and Bird, N.C. (2001) A preliminary description of the anatomy and development of the zebrafish axial skeleton. ZFIN Direct Data Submission.
• Secondary:

  Ferreri et al., J. Fish Biol. 56:1115-1128 (2000)

  Dingerkus and Uhler, Stain Technology 52: 229-232 (1977)

  Potthoff, In Ontogeny and Systematics of Fishes, vol. 1 (ed. H. G. Moser) Spec. Pub. Am. Soc. Icthyol. Herp, (1984).

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