The South African Hordeum capense is more closely related to some American Hordeum species than to the European Hordeum secalinum: a perspective based on the 5S DNA units (Triticeae: Poaceae)

2003 ◽  
Vol 81 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Bernard R Baum ◽  
Douglas A Johnson
Keyword(s):  
South African ◽  
Continental Drift ◽  
5S Rdna ◽  
South American ◽  
The South ◽  
South American Species ◽  
Class Composition ◽  
Unit Class ◽  
5S Dna ◽  
Hordeum Species

Several authors have proposed that the European Hordeum secalinum and the morphologically similar South African Hordeum capense are conspecific. In this paper we provide evidence that the two species differ in their 5S DNA unit class composition. We also report on the diversity of 5S DNA units in Hordeum muticum, a South American species. When the 5S rDNA unit class composition for these three species is compared with the unit class composition for all Hordeum species thus far investigated, it appears that H. capense is more closely related to the American Hordeum species containing the long Y2 unit class, than to H. secalinum, which lacks the long Y2 unit class but contains the long X2 unit class found in H. marinum. This analysis suggests H. capense may have originated from a stock common to the South American species, such as H. muticum.Key words: 5S DNA unit class, Hordeum capense, Hordeum secalinum, Hordeum muticum, continental drift.

The 5S rRNA gene units in the native New World annual Hordeum species (Triticeae: Poaceae)

2000 ◽  
Vol 78 (12) ◽  
pp. 1590-1602 ◽  
Author(s):  
Bernard R Baum ◽  
Douglas A Johnson
Keyword(s):  
Gene Tree ◽  
Cladistic Analysis ◽  
5S Rdna ◽  
Hordeum Spontaneum ◽  
Rrna Gene ◽  
South American Species ◽  
Hordeum Vulgare L ◽  
Unit Classes ◽  
Unit Class ◽  
Hordeum Species

We have employed a polymerase chain reaction (PCR) based approach to amplify 5S rDNA sequences from 20 accessions representing five Hordeum species native to the Americas. Sequence analysis of 88 clones revealed three sets of orthologous sequences in Hordeum pusillum Nutt. and two sets in the other four species. The long H1 unit class, previously known in Hordeum bulbosum L., Hordeum marinum L. s.l., Hordeum murinum L. s.l., Hordeum spontaneum Boiss., and Hordeum vulgare L., was found also in Hordeum depressum (Scribner & Smith) Rydberg and in H. pusillum; however, the majority of the sequences fell within two new classes of orthologous sequences. Sequences of the long H2 unit class were found in four species but not in H. depressum. Sequences of the long Y2 unit class were found in all five species. The long H2 and long Y2 unit classes appear to be unique to this group of five, mostly annual, North and South American species. Cladistic analysis of the orthologous sequences from the species with the long H1 unit class places the long H1 sequence of Hordeum flexuosum Steudel in the same clade with H. murinum, whereas H. depressum is more closely related to the perennial species, Hordeum bogdanii Wilenski and H. bulbosum. This association differs from previously described species relationships and it may be that the gene tree differs from the species tree. A cladistic analysis of paralogous sequences of the two new unit classes defined in this study together with the long H1, the long Y1 and the long X2 unit classes uncovered in previous work in Hordeum, was performed. Based upon these analyses, we hypothesize that the possible order of divergence was first the division into two branches leading to the long H1 unit class and the long H2 unit class; the lineage leading to the long H2 class was further divided to give rise to branches leading to the long Y1, the long Y2 and the long X2 classes.Key words: 5S rDNA, genomes, haplomes, unit classes, Hordeum, Triticeae.

Cnidochloa: A New Genus of Grasses from Brazil (Poaceae: Panicoideae: Paniceae)

2020 ◽  
Vol 105 (2) ◽  
pp. 183-194
Author(s):  
Fernando O. Zuloaga ◽  
Sandra S. Aliscioni ◽  
M. Amalia Scataglini
Keyword(s):  
New Genus ◽  
Phylogenetic Position ◽  
South American ◽  
The South ◽  
South American Species ◽  
Molecular Characters

Generic boundaries of the South American species Panicum longipedicellatum Swallen are explored and compared with allied genera of the tribe Paniceae. On the basis of morphological, anatomical, and molecular characters a new genus, Cnidochloa Zuloaga, is proposed. The phylogenetic position of the new genus within the Paniceae is evaluated.

Darwin wasps of the subfamily Pimplinae (Hymenoptera: Ichneumonidae) of Mexico: genera Apechthis Förster, Itoplectis Förster and Pimpla Fabricius

Zootaxa ◽  
2021 ◽  
Vol 5071 (4) ◽  
pp. 451-491
Author(s):  
ANDREY I. KHALAIM ◽  
ENRIQUE RUÍZ-CANCINO
Keyword(s):  
Junior Synonym ◽  
South American ◽  
The South ◽  
South American Species ◽  
Identification Keys ◽  
First Time ◽  
Mexican Species

Mexican species of three pimpline genera, Apechthis Förster (one  species), Itoplectis Förster (six species) and Pimpla Fabricius (20 species, including one unidentified taxon), are reviewed. Four species of Pimpla are described as new to science: P. chamela sp. nov., P. oaxacana sp. nov., P. tequila sp. nov. and P. xalapana sp. nov. Pimpla thoracica Morley, 1914 is found to be a junior synonym of P. ellopiae Harrington, 1892 (syn. nov.). Apechthis zapoteca (Cresson) is recorded for the first time from Venezuela, Pimpla dimidiata (Townes) from Mexico, P. caeruleata Cresson, P. croceiventris (Cresson), P. sanguinipes Cresson and P. sumichrasti Cresson from Honduras, P. ichneumoniformis Cresson and P. viridescens Morley from Guatemala and Honduras, and P. punicipes Cresson from Panama. The South American species Pimpla caerulea Brullé and the Nearctic species P. pedalis Cresson are excluded from the Mexican fauna. Male of Itoplectis mexicana and female of Pimpla dimidiata are recorded for the first time. Identification keys to the species of Itoplectis and Pimpla occurring in Mexico are provided.  

Systematic revision of Calligrapha s. str. Chevrolat (Coleoptera: Chrysomelidae, Chrysomelinae)

Zootaxa ◽  
2021 ◽  
Vol 4953 (1) ◽  
pp. 1-111
Author(s):  
JESÚS GÓMEZ-ZURITA
Keyword(s):  
Leaf Beetle ◽  
South American ◽  
The South ◽  
South American Species ◽  
Systematic Revision ◽  
Generic Type ◽  
The Status ◽  
Taxonomic Changes ◽  
Current Species

In this work, the Chrysomelinae leaf beetle subgenus Calligrapha s. str. Chevrolat, 1836 is revised, offering redescriptions and keys for identification of twelve species currently considered in this group, allied to the South American species Calligrapha polyspila (Germar, 1821), the generic type of Calligrapha. The current species count results from important taxonomic changes. These include reversing a long-held synonymy, resurrecting the name Calligrapha mexicana Stål, 1859 stat. rev. for a species that is different from Chrysomela serpentina Rogers, 1856; upgrading the status of Polyspila serpentina var. discrepans Achard, 1923 to Calligrapha discrepans (Achard) stat. rev.; and formally proposing a number of new synonymies for several species, including: (1) Calligrapha discrepans (Achard) (= Calligrapha serpentina ssp. temaxensis Bechyné, 1952 syn. nov.); (2) Calligrapha fulvipes (Gistel, 1848) (= Calligrapha bajula Stål, 1860 syn. nov.; = Calligrapha nupta Stål, 1859 syn. nov.; = C. sponsa Stål, 1859 syn. nov.); and (3) Calligrapha polyspila (Germar) (= Polyspila polyspila var. bilineolata Achard, 1923 syn. nov.; = Polyspila polyspila var. plagata Achard, 1923 syn. nov.). 

Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers

Zootaxa ◽  
2020 ◽  
Vol 4751 (1) ◽  
pp. 75-104
Author(s):  
MAURICIO M. ROCHA ◽  
ELIANA M. CANCELLO
Keyword(s):  
New Species ◽  
South America ◽  
Geographic Distribution ◽  
Comparative Anatomy ◽  
Distribution Patterns ◽  
South American ◽  
The South ◽  
South American Species ◽  
Two New Species ◽  
First Time

In this contribution we present updates on the taxonomy and morphology of the South American species of Amitermes. Two new species are described: Amitermes bandeirai, sp. n., from Brazil, and Amitermes lilloi, sp. n., from Argentina. Amitermes nordestinus is a junior synonym of Amitermes aporema. The imago of A. aporema is described for the first time. Detailed comparative gut anatomy of the eight species is presented for the first time. The geographic distribution of Amitermes in South America is expanded and the distribution patterns of some species are discussed. 

scholarly journals Svastra maculata sp. n. e notas sobre as espécies sul-americanas de Svastra Holmberg (Hymenoptera, Anthophoridae)

1998 ◽  
Vol 27 ◽  
Author(s):  
Danúncia Urban
Keyword(s):  
Junior Synonym ◽  
South American ◽  
The South ◽  
South American Species

São estudadas as espécies de Svastra Holmberg, da América do Sul: é descrita Svastra maculata sp. n., da Argentina; Svastra bombilans Holmberg, 1884 é considerada sinônimo únior de Svastra flavitarsis (Spinola, 1851); Svastra detecta Holmberg, 1884, permanece como boa espécie. ABSTRACT The South American species of the Neotropical genus Svastra are studied. Svastra maculata sp.n. from Argentina is described; Svastra bombilans (Holmberg, 1884 is considered junior synonym of Svastra latitarsis (Spinola, 1851) and Svastra detecta Holmberg, 1884 remains as a good species. RÉSUMÉ Les espêces du genre Svastra du Chile et de l'Argentina sont étudiés. Svastra maculata sp. n. est décrit. Svastra bombilans Holmberg, 1884. est considéré comme synonyme jeune de Svastra flavitarsis (Spinola, 185 1) et Svastra detecta Holmberg, 1884, une bonne espéce.

Studies in Pseudocyphellaria (Lichens). III. The South American Species

1993 ◽  
Vol 96 (1) ◽  
pp. 178
Author(s):  
John J. Engel ◽  
D. J. Galloway
Keyword(s):  
South American ◽  
The South ◽  
South American Species
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