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Baker, H. R.; Brinkhurst, R. O. (1981). A revision of the genus Monopylephorus and redefinition of the subfamilies Rhyacodrilinae and Branchiurinae (Tubificidae: Oligochaeta). Canadian Journal of Zoology. 59(6): 939-965.
280139
Baker, H. R.; Brinkhurst, R. O.
1981
A revision of the genus Monopylephorus and redefinition of the subfamilies Rhyacodrilinae and Branchiurinae (Tubificidae: Oligochaeta).
Canadian Journal of Zoology
59(6): 939-965.
Publication
Available for editors  PDF available [request]
The genus Monopylephorus Levinsen, 1884 is revised, and divided into three genera. Monopylephorus includes rubroniveus, limosus, kermadecensis, parvus, irroratus, aucklandicus, and the new species cuticulatus and evertus. Rhizodrilus Smith, 1900 includes lacteus, africanus, pacificus, lowryi, and arthingtonae, the last two being transferred from Torodrilus Cook, 1970 and Rhyacodrilus Bretscher, 1901 respectively. Peristodrilus gen.nov. contains the single species montanus. Two other species (M. longisetosus and M. frigidus) will be referred to a new genus within the Phallodrilinae rather than the Rhyacodrilinae. The single member of the Branchiurinae, Branchiura sowerbyi Beddard, 1892 is related to both Rhizodrilus and Bothrioneurum Stolc, 1888 and is included with the Rhyacodrilinae. Telmatodrilus multiprostatus does not usually have its spermathecae in IX but in X as normal, and is not related to Rhizodrilus.The diffuse prostates in some Rhyacodrilinae may have groups of cells penetrating the muscle layers of the atria, somewhat resembling the clustered cells of the Telmatodrilinae, but with the cell bodies still forming a continuous atrial covering.The forward relocation of the spermathecae in Rhizodrilus and their absence in Bothrioneurum seems to be related to the development of large copulatory bursae in XI and the occupation of much of X by atria and vasa deferentia.
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Littodrilus aucklandicus (Benham, 1909) accepted as Monopylephorus aucklandicus (Benham, 1909) (source of synonymy)
Monopylephorus Levinsen, 1884 (redescription)
Monopylephorus africanus Michaelsen, 1913 accepted as Rhizodrilus africanus (Michaelsen, 1913) (new combination reference)
Monopylephorus aucklandicus (Benham, 1909) (redescription)
Monopylephorus cuticulatus Baker & Brinkhurst, 1981 (original description)
Monopylephorus evertus Baker & Brinkhurst, 1981 (original description)
Monopylephorus helobius Loden, 1980 accepted as Monopylephorus rubroniveus Levinsen, 1884 (source of synonymy)
Monopylephorus irroratus (Verrill, 1873) (source of synonymy)
Monopylephorus limosus (Hatai, 1898) (redescription)
Monopylephorus pacificus Brinkhurst & Baker, 1979 accepted as Rhizodrilus pacificus (Brinkhurst & Baker, 1979) (new combination reference)
Monopylephorus parvus Ditlevsen, 1904 (additional source)
Peristodrilus Baker & Brinkhurst, 1981 (new combination reference)
Postiodrilus sonderi Boldt, 1926 accepted as Monopylephorus trichochaetus Ditlevsen, 1904 accepted as Monopylephorus irroratus (Verrill, 1873) (source of synonymy)
Rhizodrilus africanus (Michaelsen, 1913) (redescription)
Rhizodrilus arthingtonae (Jamieson, 1978) (new combination reference)
Rhizodrilus aucklandicus Benham, 1909 accepted as Monopylephorus aucklandicus (Benham, 1909) (source of synonymy)
Rhizodrilus kermadecensis Benham, 1915 accepted as Monopylephorus kermadecensis (Benham, 1915) (source of synonymy)
Rhizodrilus lacteus Smith, 1900 (redescription)
Rhizodrilus montanus HrabÄ›, 1962 accepted as Peristodrilus montanus (HrabÄ›, 1962) (new combination reference)
Torodrilus lowryi Cook, 1970 (additional source)
Northern Provinces for Rhizodrilus africanus (Michaelsen, 1913) 
Holotype USNM 61791, locality Canadian Exclusive Economic Zone [Pacific part], identified as Monopylephorus cuticulatus Baker & Brinkhurst, 1981
Holotype USNM 61976, identified as Monopylephorus evertus Baker & Brinkhurst, 1981
Holotype ZMH 7496, identified as Rhizodrilus africanus (Michaelsen, 1913)