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  • 101
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 417 (2000), S. 1-10 
    ISSN: 1573-5117
    Schlagwort(e): taxonomy ; copepods ; Einsle ; chromatin diminution ; enzyme electrophoresis ; Cyclops
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Materialart: Digitale Medien
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  • 102
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 421 (2000), S. 77-90 
    ISSN: 1573-5117
    Schlagwort(e): Tobrilidae ; new record ; Nematoda ; taxonomy ; China
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Eutobrilus annetteae Joubert & Heyns, 1979 with its male reported for the first time, Semitobrilus pellucidus (Bastian, 1865) Tsalolichin, 1983, and Epitobrilus allophysis(Steiner, 1919) Tsalolichin, 1996 are described from the Li River at Guiling, China. The male of Eutobrilus annetteae is characterized by lots of crystalloids inside body, almost straight spicules about one anal body diameter long and seven equally sized supplements. Semitobrilus pellucidus from Guiling shows large variation in body width, position of amphids, form of buccal cavity, distance between denticles, direction of vagina, arrangement of oocytes, and shape of eggs. It is different from other populations in its shorter cephalic setae, less than 60% of head width, in its shorter tail and smaller c′ value. In males, there are 6–9 supplements, reduced and irregulary spaced. Epitobrilus allophysisis characterized by its labial setae longer than 50% of head width, small, posteriorly located ovoid amphid, single egg occupying whole space of uterus and blunt tail tip.
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  • 103
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 421 (2000), S. 165-178 
    ISSN: 1573-5117
    Schlagwort(e): Kurzia ; Crustacea ; Anomopoda ; Chydoridae ; taxonomy ; distribution ; Cladocera
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The genus Kurzia is divided into two subgenera: Kurzia s. str. and Rostrokurzia n. subg. Subgenus Kurzia includes Kurzia (K.) latissima Kurz, 1874, with a palearctic -, Kurzia (K.) polyspina n. sp. with a neotropic - , and Kurzia (K.) cf. media (Birge, 1879) with a nearctic distribution. Rostrokurzia includes Kurzia (R.) longirostris Daday, 1898 (pantropical distribution), and Kurzia (R.) brevilabris Rajapaksa & Fernando, 1986, from subtropical and tropical Asia. Kurzia latissima Kurz, 1874, from Central Europe is redescribed in detail.
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  • 104
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 429 (2000), S. 9-23 
    ISSN: 1573-5117
    Schlagwort(e): taxonomy ; marine nematodes ; Sabatieria ; Metacomesoma ; Paramonhystera ; Siphonolaimus ; the Strait of Magellan ; Chile
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Six species of Monhysteroida are described from the Strait of Magellan and the Beagle Channel, Chile. Three species of which, Sabatieria heipi n. sp., Paramonhystera geraerti n. sp. and Siphonolaimus smetti n. sp., are new to science. Sabatieria heipi n. sp. is characterised by a body length of 1529–1934 μm, cuticle punctuations with lateral differentiation; cephalic setae 5 μm long, amphids spiral with 4.0–4.2 turns, 10–11 μm in diameter; spicules 76 μm (2.1 anal body diameter), with a 6 μm projection in the ventral distal extremity, 11 minute precloacal supplements; tail 3.7–4.7 anal body diameter (abd) long with enlarged tip. Paramonhystera geraerti n. sp. is characterised by a body size of 705–767 μm; head diameter 12 μm, the cephalic setae 6 μm; amphids circular, 9–10 μm in diameter; spicules slender 108–116 μm (5.6 abd) long, 5 precloacal supplements; and tail 4.0–5.2 abd. Siphonolaimus smetti n. sp. is characterised by the long spear (40–45 μm), head diameter 11–12 μm, amphids circular, 12–13 μm in diameter or 50–57% of corresponding body diameter; the spicules 55 μm and 1.5 abd; tail conical, 2.8 abd (males) and 4.0 abd (females) long. Three other species, i.e. Metacomesoma cyatholaimoides Wieser, 1954, Paramonhystera biforma Wieser, 1956 and P. megacephala (Steiner, 1916) are redescribed. A key of all known species of Paramonhystera is proposed.
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  • 105
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 429 (2000), S. 115-131 
    ISSN: 1573-5117
    Schlagwort(e): Mesocyclops mariae n.sp. ; Mesocyclops shenzhenensis n. sp. ; Guangxi ; Guangdong ; China ; taxonomy ; distribution
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Two new Mesocyclops species, M. mariae n. sp. and M. shenzhenensisn. sp., are described from southern China, the former species from Guangxi province, the latter from Guangdong province. Both species have setules on the medial margin of the caudal rami. Compared with each other, there are some conspicuous differences, such as the spinule pattern of the antenna basipodite, the structure of receptaculum seminis, the armature of coxopodite and basipodite of P4 and the armature of the caudal rami. The paper also compares the two new species with their supposedly closest relatives, M. pseudospinosus Dussart & Fernando, 1988, M. leuckarti(Claus, 1857) and M. pehpeiensisHu, 1943. In addition, other species of Mesocyclops in China are discussed and a key to 10 Chinese species of Mesocyclops is provided.
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  • 106
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 433 (2000), S. 153-156 
    ISSN: 1573-5117
    Schlagwort(e): acid ; taxonomy ; protists ; ciliate ; flagellate
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The occurrence and some important taxonomic problems of heterotrophic protists from extremely acidic (pH ≤3) environments are briefly discussed. Almost all information on the occurrence of heterotrophic protists from extremely acidic environments is restricted to acid mine drainage (AMD) or streams influenced by AMD. Most of the information is provided for ciliates. Very little information is available on the occurrence of flagellates, rhizopods and heliozoa in this environment. Within the ciliates Urotricha, Vorticella and Oxytricha dominate in acidic mining lakes. Actinophrys sp. is the most important heliozoan in these environments. There are many taxonomic problems which are not solved so far. Live observations and taxonomic methods adapted to the extreme chemical matrix are necessary for correct identification.
    Materialart: Digitale Medien
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  • 107
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 73 (1980), S. 229-236 
    ISSN: 1573-5117
    Schlagwort(e): taxonomy ; India ; Rotatoria
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Taxonomic studies of Indian rotifers have revealed the presence of 241 species which are listed in an appendix. The nature of the Indian rotifer fauna is discussed.
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  • 108
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 73 (1980), S. 215-220 
    ISSN: 1573-5117
    Schlagwort(e): Rotatoria ; taxonomy ; geographical distribution
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract An attempt is undertaken to determine criteria and limits of taxonomic rank in the genus Notholca proceeding from the standpoint of level-values of the characters evolution. Level-values of characters were established using Vavilov's principle of homologic series of hereditary variability. As a result of taxonomic revision such terms as group of species, species and subspecies are recommended. Analysis of the scheme of relations between representatives of the genus and data on their ranges gives a clue to relations between phylogeny and geographic distribution of the group over the vast territory of the Asian continent which may have been its centre of speciation.
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  • 109
    ISSN: 1573-5117
    Schlagwort(e): Sponge ; Porifera ; taxonomy ; scanning electron microscopy ; Heteromeyenia tubisperma
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Taxonomic diagnostic criteria of the spongillid freshwater sponge, Heteromeyenia tubisperma (Potts, 1881) were examined using scanning electron microscopy. The species is characterized by a gemmule which bears an unusually long, prominent porous tube. The application of SEM to the systematic studies of the freshwater sponges provides diagnostic capabilities not available with the light microscope. It is desirable that a key, coupled with a reference atlas of scanning electron micrographs illustrating taxonomic diagnostic criteria of freshwater sponge species, particularly utilizing type specimens, be developed.
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  • 110
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 101 (1983), S. 165-178 
    ISSN: 1573-5117
    Schlagwort(e): Aphanolaimus ; Nematoda ; taxonomy ; morphology ; distribution
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A nematological survey of Belgium revealed four species of Aphanolaimus, two known ones, A. attentus de Man, 1880 and A. aquaticus Daday, 1894, and two new ones. A. pseudoattentus n.sp. resembles A. attentus in many respects but can easily be distinguished by the greater body length, the head shape, the shape of the amphideal fovea and the longer cephalic setae. A. deconincki n.sp. is characterized by its head shape, shape of amphideal fovea, posterior origin of lateral field and large number of body annules.
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  • 111
    ISSN: 1573-5117
    Schlagwort(e): Aphanizomenon ; Cyanobacteria ; 16S rRNA ; morphology ; sequences ; taxonomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The taxonomy of Aphanizomenon flos-aquae strain NH-5, a producer of cyanotoxins, was re-evaluated by comparison with six other Aphanizomenon strains using morphological characteristics and 16S rRNA gene sequences. Strain NH-5 was concluded to be improperly identified as Aph. flos-aquae based upon (1) lack of bundle formation in the trichomes, (2) location of akinetes next to heterocytes, (3) lower similarities (less than 97.5%) in the 16S rRNA gene sequences relative to Aph. flos-aquae strains, and (4) comparison within a phylogenetic tree constructed from 16S rRNA gene sequences. The Aphanizomenon strains investigated in this study are classified to four morphological groups as described by the classical taxonomy of Komárek & Kovácik (1989). This classification was supported from the phylogenetic results of 16S rRNA gene sequences. This study also discusses the generic boundaries between Aphanizomenon and Anabaena.
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  • 112
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 438 (2000), S. 107-116 
    ISSN: 1573-5117
    Schlagwort(e): Cyanophyta/Cyanobacteria ; Aphanizomenon ; Anabaena ; taxonomy ; morphology of trichomes ; heterocytes and akinetes ; Slovakia ; Austria
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Morphological variation of trichomes, heterocytes and akinetes in four species classified into the nostocalean genera Aphanizomenon Morren ex Bornet et Flahault or Anabaena Bory (Cyanophyta/Cyanobacteria) was studied from natural samples by LM and illustrated by drawings and micrographs. All investigated species, Aphanizomenon gracile (Lemmerm.) Lemmerm., A. aphanizomenoides (Forti) Komárek et Horecká, Anabaena bergii Ostenfeld, A. minderi Huber-Pestalozzi, occur in the plankton as solitary trichomes, similar to many representatives of the genus Anabaena. Main generic diagnostic characters of Aphanizomenon and Anabaena are discussed.
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  • 113
    ISSN: 1573-5117
    Schlagwort(e): Anabaena ; cyanobacteria ; identification ; morphology ; planktic ; taxonomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Fifty (50) strains of planktic species of Anabaena (cyanobacteria), including collections from Japan and China and from different culture collections, were induced to form akinetes at low temperature (15 °C). Their morphologies were then observed and described. Fourty seven strains successfully formed akinetes and these were classified into 20 species comprising seven with straight trichomes and 13 with coiled trichomes. Three strains, which did not form akinetes, were separated into two taxonomic groups, but could not be identified to any described species. In addition, a key to the planktic species of Anabaena described in the study is presented.
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  • 114
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 433 (2000), S. 137-143 
    ISSN: 1573-5117
    Schlagwort(e): Cyanidium caldarium ; Cyanidioschyzon merolae ; Galdieria sulphuraria ; taxonomy ; acidophily
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The ecophysiological, cytomorphological, biochemical and molecular data presently available for the acidophilic red algal species Cyanidium caldarium, Cyanidioschyzon merolae and Galdieria sulphuraria are summarised. The taxonomic position of the three genera is discussed and emendements to the generic diagnosis are presented.
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  • 115
    ISSN: 1573-5117
    Schlagwort(e): Cyanidium caldarium ; Cyanidioschyzon merolae ; Galdieria sulphuraria ; rbcL ; taxonomy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Cyanidium caldarium, Cyanidioschyzon merolae and Galdieria sulphuraria are three unicellular algae characteristic, of acid thermal environments. Recently, on the basis of morphological characters, three new species of Galdieria (G. partita, G. daedala, G. maxima ) isolated from acid-thermal springs in Russia have been instituted. A selected region of rbcL and the sequence of the intergenic spacer between the rbcL and rbcS have been amplified and sequenced from different Galdieria species and strains, in order to define molecular relationship among these interesting algae. The obtained cladogram shows that Cyanidium caldarium and Cyanidioschyzon merolae form a sister group which, in turn, is in a sister group relationship with Galdieria. This last genus is divided in two clades, one of which includes G. sulphuraria accessions from Naples (Italy), California, and Yellowstone and the other one includes G. sulphuraria accessions from Java (Indonesia) and from the Russian species. These results support the status of the genus Galdieria and suggest that G. daedala, G. maxima and G. partita are three very similar strains of G. sulphuraria; the rbcL variation within Galdieria accessions has a pattern which is broadly connected to the geographial distribution. The data obtained from the intergenic rbcL-rbcS spacer partly confirm those from the rbcL analysis.
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  • 116
    ISSN: 1573-5117
    Schlagwort(e): Chydoridae ; Anomopoda ; taxonomy ; Karualona ; trunk limbs
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The species group of Alona karua is raised to generic rank and named Karualona. The genus is defined on the basis of a number of characters of the body and its appendages. Tentative new microcharacters are introduced, related to the type and length of selected setae of P1, P2, P3 and P4. Two new species are described, one from the island of Socotra and one from Mexico. A key to the five currently recognized species is given.
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  • 117
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 435 (2000), S. 43-59 
    ISSN: 1573-5117
    Schlagwort(e): Nematoda ; Coninckiidae ; Comesomatidae ; White Sea ; taxonomy ; descriptions
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Ten new and known species of the genera Coninckia, Cervonema, Laimella and Sabatieria are described from the White Sea. Coninckia macroseta sp. n. resembles C. seta Wieser et Hopper, 1967 (Florida coast of U.S.A.) in shape of the amphid and other characters, but differs from the latter by greater body length (2399 μm versus 1300–1400 μm) and by the a-index (83 versus and a 57–58). Cervonema proximamphidum sp. n. differs from all other species of Cervonema by the shape of posterior widening of the pharynx (except for C. allometricum Wieser, 1954 whose original description is too brief). The pharynx of the new species forms posteriorly a conical widening with vague radial striation, whereas the pharynx of other Cervonema species presents posteriorly an oval or elongate thickening with wavy contour and distinct muscular transversal striation. The other diagnostic characters of Cervonema proximamphidum sp. n. are close position of the amphid to the anterior end (distance from the anterior end to the amphid 6–7.5 μm), longer outer labial and cephalic setae (5–5.5 μm), relatively longer and slender body (respectively, 1423–1563 μm and a=30.9–41.1). Specimens Cervonema minutus Muthumbi, Soetaert et Vincx, 1997 largely agree with the original description of Muthumbi et al. (1997) based on the nematodes sampled in the Indian Ocean deep sea; only cephalic setae length (2.7–3.5 versus 2 μm) differ. The White Sea specimens Laimella filipjevi coincide well with the description of Jensen (1979) made on nematodes from the western Baltic Sea, except slight difference in body length (1564–1837 μm versus 1086–1152 μm). Sabatieria kolaensis (Ssaweljev, 1912) is redescribed and restored as valid species. Sabatieria kolaensis was assigned by Platt (1985) to the list of dubious species because of very brief original description lacking some important details. Sabatieria kolaensis belongs to the S. praedatrix species group and is characterized by the greatest number of preanal supplements (31–40). Sabatieria lawsi Platt, 1983 was previously known from the only Antarctic Peninsula shelf; the single White Sea male specimen corresponds well to the original diagnosis of Platt (1983). Sabatieria lawsi is considered to be very close or near identical to S. praedatrix de Man, 1907. The species Sabatieria longispinosa Lorenzen, 1972, S. ornata (Ditlevsen, 1918), S. pulchra (G. Schneider, 1906) and S. strigosa Lorenzen, 1972 are also described and discussed.
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  • 118
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 84 (1981), S. 113-127 
    ISSN: 1573-5117
    Schlagwort(e): Turbellaria ; meiobenthos ; fauna composition ; taxonomy ; Netherlands Delta area
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Sand dwelling Turbellaria from the Delta of the Rivers Rhine, Meuse and Scheldt have been investigated. Thirty-eight samples taken from littoral and sublittoral stations in the Grevelingen, Eastern and Western Scheldt have been analysed. Thirty-three species were recorded (Acoela were not considered); twenty-four of them are new for the area and seven new species are described. Density and diversity of Turbellaria were higher in the Eastern Scheldt than in the Western Scheldt or in the Lake Grevelingen. A maximum density of 82 ind./100 cm3 was noted. A tentative calculation on relative abundance of the representatives of the different Turbellaria orders is established. Proseriata seem to be dominant in the localities studied.
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  • 119
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 84 (1981), S. 139-145 
    ISSN: 1573-5117
    Schlagwort(e): Turbellaria ; Proseriata ; Coelogynoporidae ; taxonomy ; New England
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Eleven species of the proseriate turbellarian family Coelogynoporidae have been encountered between Cape Cod, Mass. and the southern shore-line of New Brunswick, Canada. The distributions of Coelogynopora schultzii, C. biarmata and Cirrifera cirrifera are reported. Four new species belonging to the genus Coelogynopora, one new species of Cirrifera and a species belonging to a new genus are described. Two species remain undescribed. Biological observations on a laboratory-reared colony of C. biarmata maintained since 1978 are reported.
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  • 120
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 87 (1982), S. 255-271 
    ISSN: 1573-5117
    Schlagwort(e): taxonomy ; distribution ; Pseudodiaptomus binghami ; P. hickmani ; P. tollingerae ; P. annandalei ; River Krishna ; Lake Kolleru ; India
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract In a study of the copepod fauna of the River Krishna and Lake Kolleru, four species of the genus Pseudodiaptomus Herrick, 1884 were encountered. They are: P. binghami Sewell, 1912 from both the river and lake, P. hickmani Sewell, 1912, P. tollingerae Sewell, 1919 and P. annandalei Sewell, 1919 from the lake. P. binghami and P. hickmani are redescribed. P. binghami malayalus Wellershaus, 1969 is accorded full species status. P. tollingerae and P. annandalei are provided with detailed illustrations, and mention has been made of such morphological features and/ or variation as are not hitherto documented. Distribution records are provided for all four species.
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  • 121
    Digitale Medien
    Digitale Medien
    Springer
    Hydrobiologia 94 (1982), S. 17-24 
    ISSN: 1573-5117
    Schlagwort(e): Hirudinea ; freshwater leech ; Assiut ; Egypt ; taxonomy ; morphology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Beschreibung einer neuen Egel-Art der Gattung Barbronia Johansson, 1918. Sie wurde in Süßwassergräben im Gelände der Landwirtschatlichen Fakultät der Universität Assiut Ägypten während der Jahre 1978 und 1979 gesammelt. Sie wird Barbronia assiuti n.sp. gennant.
    Notizen: Abstract A new species of leech of the genus Barbronia Johansson, 1918 was collected in freshwater canals near the Faculty of Agriculture, Assiut, Egypt, during the years 1978 and 1979. We have named it Barbronia assiuti n.sp.
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  • 122
    Digitale Medien
    Digitale Medien
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    Human evolution 15 (2000), S. 63-74 
    ISSN: 1824-310X
    Schlagwort(e): comparative anatomy ; taxonomy ; species ; Homo erectus ; Homo heidelbergensis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Patterns of human evolution in the Middle Pleistocene remain poorly understood. There is general consensus that by the onset of this time period, populations ofHomo erectus were dispersed from Africa into Eurasia, including the Far East. In the western part of this range (perhaps in Africa),Homo erectus then produced a daughter lineage exhibiting more advanced characters of the face, braincase and cranial base. How this new species should be defined is currently debated. In my view, fossils from sites such as Bodo and Broken Hill in Africa may be lumped with material from earlier Middle Pleistocene localities in Europe. Such a taxon is appropriately namedHomo heidelbergensis. Whether the hypodigm should be extended to include fossils from China is another question. In any case, this group of hominids is plausibly ancestral to both the specialized Neanderthals of Europe and more modern humans of the later Middle Pleistocene.
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  • 123
    Digitale Medien
    Digitale Medien
    Springer
    World journal of microbiology and biotechnology 16 (2000), S. 881-888 
    ISSN: 1573-0972
    Schlagwort(e): Biotechnology ; ecology ; fungi ; nomenclature ; status ; synopsis ; taxonomy ; thermophile
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Abstract The present synopsis reports on taxonomic decisions and name changes introduced in the last decades for a number of thermophilic fungi. Taxa dealt with are those most commonly cited in the literature of fundamental and applied work or concern species having complex taxonomic histories. The definition of a thermophile follows the classificatory scheme elaborated by Cooney & Emerson in 1964. The synopsis provides the latest legal valid names for several thermophiles. Binomials of accepted synonymies are also reported with arguments in favour of these taxonomic decisions. The material of this contribution is a synthetic simplified account of two previous reviews on the taxonomy of thermophilic fungi. The present document aims: (1) to suppress the use of ghost binomials having no status of any kind; (2) to favour the continuous use of the latest legal valid name of a taxon to avoid cases of redundancies by citing binomials of known synonyms. Homogeneity in cited names is a fundamental prerequisite for comparative studies. The synopsis is thus a sound tool for future critical reviews of ecological and of biotechnological interests. The status of over a hundred names are here reviewed. Two additional new synonyms are proposed; these concern Mucor miehei var. minor and Sporotrichum cellulophilum.
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