WoRMS source details

Erseus, C. (1980). Taxonomic studies on the marine genera Aktedrilus Knöllner and Bacescuella Hrabe (Oligochaeta, Tubificidae), with descriptions of seven new species. Zoologica Scripta. 9:97-111.
279872
Erseus, C.
1980
Taxonomic studies on the marine genera Aktedrilus Knöllner and Bacescuella Hrabe (Oligochaeta, Tubificidae), with descriptions of seven new species
Zoologica Scripta
9:97-111
Publication
Available for editors  PDF available [request]
The taxonomy and morphology of Aktedrilus Knollner, 1935 and Bacescuella Hrabé, 1973 (subfamily Phallodrilinae), both common genera of the marine, littoral meiofauna, were studied on the basis of material from various geographical areas. A. monospermathecus Knöllner, 1935 is redescribed from France and Scotland. A. magnus sp.n., A. brevis sp.n., A. curvipenis sp.n. and A . floridensis sp.n. are described from Italy, Brazil, France and Florida, respectively. Two very closely related forms are described from the Pacific: A. locyi sp.n. (California) and A. parvisprostatus sp.n. (Great Barrier Reef). B. mediterranea sp.n. is described from Italy, and new European records are given for B. arctica Erséus, 1978 and B. parvithecata Erséus, 1978. Both genera are characterized by having two pairs of prostate glands, well developed penes, and unpaired, mid-dorsal spermatheca (if present). The species of Bacescuella transfer their sperm by means of external spermatophores, structures that are not developed in Aktedrilus. The eight species of Aktedrilus are largely distinguished by means of the morphology of the spermatheca, penes and prostates. The four species of Bacescuella differ principally from each other in the length of the vasa deferentia, and in the morphology of the prostates and copulatory organs. Most Bacescuella species lack spermatheca.
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Ascension part of the South Atlantic Ocean for Aktedrilus parviprostatus Erséus, 1980 
Bermudian part of the North Atlantic Ocean for Aktedrilus locyi Erséus, 1980 
Brazilian part of the South Atlantic Ocean for Aktedrilus brevis Erséus, 1980 
Caspian Sea for Aktedrilus svetlovi Finogenova, 1976 
French part of the Bay of Biscay for Bacescuella parvithecata Erséus, 1978 
Great Barrier Reef for Aktedrilus parviprostatus Erséus, 1980 
Italian part of the Tyrrhenian Sea for Aktedrilus magnus Erséus, 1980 
Romanian Exclusive economic Zone for Bacescuella pontica Hrabĕ, 1973 
United Kingdom part of the North Atlantic Ocean for Bacescuella arctica Erséus, 1978 
United States part of the North Atlantic Ocean for Aktedrilus floridensis Erséus, 1980 
United States part of the North Pacific Ocean for Aktedrilus locyi Erséus, 1980 
Holotype SMNH 3141, geounit Bay of Naples (Italy), identified as Aktedrilus magnus Erséus, 1980
Holotype SMNH 3143, geounit Italian part of the Tyrrhenian Sea, identified as Bacescuella mediterranea Erséus, 1980
Holotype USNM 58210, geounit United States part of the North Atlantic Ocean, identified as Aktedrilus floridensis Erséus, 1980
Holotype USNM 58213, geounit United States part of the North Pacific Ocean, identified as Aktedrilus locyi Erséus, 1980
Holotype MNHN AS 1, geounit Brasil coast, identified as Aktedrilus brevis Erséus, 1980
Holotype MNHN AS5, geounit French Exclusive Economic Zone [Atlantic part], identified as Aktedrilus curvipenis Erséus, 1980
Holotype QM G12015, geounit Great Barrier Reef, identified as Aktedrilus parviprostatus Erséus, 1980
 Depth range

Sublittoral, 1.2 to 38 metres depth [details]

 Depth range

Marine, littoral (0-0.5 m depth). [details]

 Distribution

Known only from the type locality (Brazil, S Atlantic) [details]

 Distribution

Known only from the area of the type locality (SW France). [details]

 Distribution

Known only from the type locality (Florida). [details]

 Distribution

California (NE Pacific) and Bermuda (NW Atlantic). [details]

 Distribution

Known only from the type locality (Italy). [details]

 Distribution

Southern part of the Great Barrier Reef (S Pacific) and Ascension Island (S Atlantic). [details]

 Distribution

Known only from the type locality (Italy) [details]

 Distribution

Atlantic coast of France [details]

 Distribution

Known only from four localities along the Roumanian coast of the Black Sea (Hrabe 1973). [details]

 Ecology

Marine, intertidal sand. [details]

 Ecology

Marine, littoral sand. [details]

 Ecology

Marine, intertidal sand. [details]

 Ecology

Marine, intertidal sand. [details]

 Ecology

Marine, intertidal sand. [details]

 Ecology

A. monospermathecus is known from marine littoral and brackish water. It is reported to tolerate even limnic conditions. [details]

 Ecology

Marine, intertidal sand. [details]

 Ecology

Marine, littoral sand. [details]

 Etymology

no etymological explanation in Original paper but probably named after the collector of the holotype, Steven Locy. [details]

 Type locality

In the Caspian Sea, 3.8 m depth. [details]

 Type locality

Shore in the vicinity of Vama Veche, 10 km S of Mangalia, Roumania, Black Sea [details]