Abstract
Seven species of Tubificidae are recorded from the Canary Islands, viz. Heterodrilus amplus n. sp., Coralliodrilus leviatriatus Erséus, 1979, Limnodriloides agnes Hrabě, 1967, L. janstocki n. sp., Aktedrilus cuneus Erséus, 1984, A. parvithecatus (Erséus, 1978), and Tubifex tubifex (Müller, 1774); the two latter taxa are reported also from the Cabo Verde Islands. All taxa except T. tubifex are marine and there is no evidence of endemism in the freshwater oligochaete fauna of these islands. Heterodritus amplus has short, spindle-shaped, heavily muscular atria; they are morphologically unique within the genus. Limnodriloides janstocki has modified spermathecal setae; it is distinguished from similar species by its long atrial ducts and deep, elaborate copulatory sacs.
Highlights
Among oligochaetes from groundwater habitats in the Canary and Cabo Verde Islands, collected in 1985-1987 by Prof
The material is deposited in the Zoölogisch Museum of the University of Amsterdam (ZMA), Amsterdam
Aktedrilus cuneus, A. parvithecatus, and Limnodriloides agnes are known from all major oceans; they are most certainly circumglobal, whereas Coralliodrilus leviatriatus is at least amphi-Atlantic, being recorded from Bermuda as well
Summary
Among oligochaetes from groundwater habitats in the Canary and Cabo Verde Islands, collected in 1985-1987 by Prof. J.H. Stock (Institute of Taxonomie Zoology, University of Amsterdam), seven species of Tubificidae were found. Except Tubifex tubifex (Miiller, 1774), are marine taxa, the salinities of their habitats are mostly lower than that of seawater. The samples were instantly preserved in 1% formalin and transferred into 70% alcohol within 24 hours. The tubificid specimens were stained in paracarmine, mounted whole in Canada balsam, and studied with a light microscope. The material is deposited in the Zoölogisch Museum of the University of Amsterdam (ZMA), Amsterdam. - ZMA 2866, whole-mounted specimen from station 87/19: Canary Islands, Tenerife, Punta del Hidalgo, mediolittoral sand and gravel — ZMA 2867.1 to 2867.7, 7 specimens from the same locality Paratypes. — ZMA 2867.1 to 2867.7, 7 specimens from the same locality
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