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Casanova, 1987

Description
Hooks: 8-11; anterior teeth: 2-8; posterior teeth: 4-6.
Maximum adult body length: 8 mm; tail: 47-53 %.
Body slender and transparent; transversal musculature on trunk; head wide; hooks not serrated. Fin bridge absent; one pair of short lateral fins both on trunk and tail; lateral fins fully rayed, rounded. Collarette long; gut diverticula absent; no eyes. Seminal vesicles conical; position of seminal vesicles: touching both posterior fins and tail fin. Ovaries long, reaching to region of ventral ganglion; ova large. Adhesive papillae present; adhesive organs with adhesive appendages absent; apical glands absent.

Distribution: benthic neritic; Strait of Gibraltar.

Remarks: 24 specimens.

Type locality: Gibraltar.

Spadella birostrata