Kapp & Hagen, 1985

Description
Hooks: 7-9; anterior teeth: 1-5; posterior teeth: 1.
Maximum adult body length: 9 mm; tail: 34-38 %.
Body slender and fragile; transversal musculature on trunk and tail; head wide; hooks not serrated. Fin bridge absent; one pair of medium length lateral fins both on trunk and tail; lateral fins fully rayed, rounded. Collarette absent; gut diverticula absent; eyes absent. Seminal vesicles conical; position of seminal vesicles: separated from posterior fins, touching tail fin. Ovaries short; ova fairly small. Adhesive papillae and adhesive organs absent. Vestibular organs with long papillae; apical gland cell complex present, large; neck canals absent.

Distribution: bathypelagic.

Remarks: 5 specimens found between 1000 and 2000 m in the Antarctic Ocean (Atlantic and Indian sector).

Type locality: 60°51.7'S, 55°09.0'W.

Phylum Chaetognatha
Order Aphragmophora
Family Heterokrohniidae
Genus Heterokrohnia
Species fragilis

Status in World Register of Marine Species

Accepted name: Heterokrohnia fragilis Kapp & Hagen, 1985

Sorry, there are no scientific synonyms and common names available for this species

Kapp, H. & W. Hagen, 1985. Two new species of Heterokrohnia (Chaetognatha) from Antarctic waters. Polar Biologie, 4: 53-59.

Kapp, H., 1991. Archeterokrohnia Casanova, 1986, a junior synonym of Heterokrohnia Ritter-Zahony, 1911 (Chaetognatha), with a review of the species of Heterokrohnia. Helgolander Meeresuntersuchingen, 45: 237-252.

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