Results 121 to 130 of about 278 (174)

Cladistic analysis of the subfamilies within the Tubificidae (Oligochaeta)

Zoologica Scripta, 1990
A hypothesis of phylogenetic relationships within the family Tubificidae is presented, based on a Wagner analysis of morphological characters in the different subfamilies. Two major lincages are recognized. One, including the subfamilies Tubificinae, Telmatodrilinae and Limnodriloidinae, is supported by a synapomorphic ability to form slender ...
Christer Erséus
exaly   +2 more sources

Cuticular ultrastructure in some marine oligochaetes (Tubificidae)

Invertebrate Biology, 2000
Abstract. The ultrastructure of the thin, non‐cellular cuticle is described for 6 marine oligochaetes, representing 3 of the subfamilies (Phallodrilinae, Limnodriloidinae, and Rhyacodrilinae) of the Tubificidae. The main components of the cuticle in these 6 species, as in most other oligochaetes examined, are: (1) a fiber zone closest to the epidermis,
Lena M. Gustavsson, Christer Erséus
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Mixed reproductive strategy in Tubifex tubifex (Oligochaeta, Tubificidae)?

Journal of Experimental Zoology Part A: Comparative Experimental Biology, 2005
AbstractDespite the wide use of the tubificid oligochaete Tubifex tubifex in eco‐toxicological studies, the reproductive strategy adopted by the species, that can reasonably be assumed to be the key to its ecological success, is still not well investigated.
BALDO, LAURA, M. Ferraguti
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Parthenogenesis in Tubificidae

Hydrobiologia, 1984
The ability of tubificids to reproduce parthenogenetically following or in place of bisexual reproduction has been proved. During parthenogenesis the spermatogenesis ceases at an early stage of sexual cell development, which, together with some peculiarities of the structure of the sexual system, rules out the possibility of self-fertilization in the ...
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The double sperm line in Isochaetides (Annelida, Clitellata, Tubificidae)

Tissue and Cell, 2002
Sperm morphology and spermatogenesis were examined in the oligochaete annelid Isochaetides arenarius, a species belonging to the subfamily Tubificinae inhabiting the sediments of Lake Baikal. As all tubificines, Isochaetides produces two types of spermatozoa, named eusperm and parasperm.
M. Ferraguti, R. Marotta, P. Martin
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Enzymatic variability in sympatric species of Tubifex (Clitellata: Tubificidae)

Hydrobiologia, 1999
The globally distributed species Tubifex tubifex Muller, 1774 (Clitellata; Tubificidae) is sometimes considered to include several different morphological forms, each recognizable by their chaetal structure. The ‘blanchardi’ form is a distinct species: sympatric populations of Tubifex tubifex and Tubifex blanchardi Vejdovsky, 1871 show complete ...
Di Chiara, AP, Pagani, M, LEONI, BARBARA
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Tubificidae

2017
FAMILY TUBIFICIDAE (802 new names, 274 new combinations, 13 taxa with new rank) Family-group Limnodriloidinae Erséus, 1982e: 266 –267, fig. 36. Nootkadrilinae Finogenova, 1986: 198 –199. Erséus 1992a: 23 –24, junior synonym of Phallodrilinae. Rhyacodriloidinae Martin, Martínez-Ansemil & Sambugar, 2010: 465 –466. Genus-group Aberrantidrilus Martin, 2015
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A morphological reappraisal of Tubifex blanchardi Vejdovský, 1891 (Clitellata: Tubificidae)

Acta Zoologica, 2009
Abstract Tubifex blanchardi Vejdovský, 1891 is a freshwater tubificid, often living in sympatry with Tubifex tubifex (Müller 1774). Although considered from its discovery as a species on its own, its biological status is debated. During the early seventies T. blanchardi was reduced to a mere form of T.
Marotta, Roberto, Crottini, Angelica, Prada, Valeria, Ferraguti, Marco   +3 more
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Development of the genital ducts in Telmatodrilinae (Tubificidae, Clitellata)

Journal of Morphology, 2004
AbstractIn Tubificidae, the male genital duct comprises a funnel in the testes segment, followed by a vas deferens, an atrium, and, frequently, a copulatory structure in the adjacent ovarian segment. There may also be a diffuse or compact prostate gland in association with the duct. The morphology and position of the genital ducts are important for the
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[Growth of Tubificidae in activated sludge].

Huan jing ke xue= Huanjing kexue, 2009
The growth of Tubificidae was investigated from juvenile to adult stage for 16 weeks by cultivating Tubificidae with activated sludge as substrate in batch tests at two different temperatures (20 degrees C and 25 degrees C), monitoring changes of body length and wet weight of Tubificidae.
Hui, Zhu, Yuan-Song, Wei, Jun-Xin, Liu
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