Volume 55, Issue 1
January 1962, pages 1-65
pp 1-14 January 1962
Taxonomic notes on some interesting Hyphomycetes are presented in this paper. On the basis of study of type material of three species ofHelminthosporium (H. obclavatulum Bubak and Sydow,H. bombycinum Speg. andH. polyphragmium H. and P. Sydow),H. obclavatulum is removed toSporidesmium asS. obclavatulum (Bubak and Sydow) comb. nov.;Helminthosporium bombycinum is placed in the genusOrmathodium asO. bombycinum (Speg.) comb. nov.;Helminthosporium polyphragmium is considered to be a synonym ofCorynespora cassiicola (Berk. and Curt.) Wei. Type material of two species ofClasterosporium (C. densum H. and P. Sydow, andC. degenerans H. and P. Sydow) was also studied. Both species are described in detail.C. densum is a dematiaceous fungus producing dictyospores acrogenously and singly on conidiophores which have conspicuous annellations; further, the mycelium of this species is not hyphopodiate.C. densum is, therefore, considered distinct from the genusClasterosporium (which has hyphopodiate mycelium and produces phragmospores) and placed in a new genusAnnellophorella asA. densa (H. and P. Sydow) comb. nov.Clasterosporium degenerans is a moniliaceous fungus with hyaline mycelium and hyaline dictyospores; the mycelium is not hyphopodiate. These features exclude this fungus from the genusClasterosporium. It is made the type of a new genus,Hyalodictys and the new combination,H. degenerans (H. and P. Sydow) Subram. is proposed. A dematiaceous phragmospored fungus found in association withHelminthosporium polyphragmium Sydow in the type material of this species was also studied and is considered to be aSporidesmium; it appears to be distinct from species of this genus so far known and is given a new name,Sporidesmium camelliæ-japonicæ.
pp 15-23 January 1962
The diversity in the morphology of the SAT-chromosomes ofC. arietinum in different roots are analysed in the context of similar variations observed in the different cells of one of the roots. Intergrades between the two pairs of chromosomes with normal satellites and those with tandem ones were observed in anaphases. The differences in the number as well as the size of the SAT-grains of replicated chromosomes indicate that non-reciprocal translocations between sister chromosomes may be of parts of SAT-grains and not of entire ones.
pp 24-37 January 1962
An account of the Weberian Apparatus in two species ofMystus, namely,M. gulio andM. bleekeri, has been given. In this connection, the anterior region of the vertebral column, the posterior region of the cranium, the Weberian ossicles, the internal ears, and the air-bladder have been studied in detail.
pp 38-47 January 1962
This paper presents the results of a taxonomic study of some species ofCordella, a genus established by Spegazzini in 1886 for two species:C. coniosporioides Speg. andC. spinulosa Speg. On the basis of study of type materialC. coniosporioides is considered to be aPapularia; this may be indistinguishable fromP. vinosa (Berk. & Curt.) Mason.Cordella spinulosa is chosen lectotype species of the genus and to meet the requirements of proper typification, an emended generic diagnosis is given.Cordella is considered to provide the earliest generic name available for the type species of the generaMelanographium Sacc.,Sporosta hys Sacc. andPseudocamptoum Frag. & Cif.Cordella tomentosa Speg. is provisionally retained inCordella. Type material ofC. chætomioides Speg. revealed only aChætomium and it is suggested that the name may be rejected.Cordella magna Speg. is considered to be aLacellina and the new combinationLacellina magna (Speg.) Subram. is proposed for this fungus.Melanographium fasciculatum Hughes is transferred toCordella asC. fasciculata (Hughes) Subram.
pp 48-64 January 1962
pp 65-65 January 1962 Erratum