Poa (Poaceae) of Colombia: A Taxonomic Revision

2020 ◽  
Vol 105 (2) ◽  
pp. 232-279 ◽  
Author(s):  
Steven P. Sylvester ◽  
Robert J. Soreng ◽  
William J. Bravo-Pedraza ◽  
Lia E. Cuta-Alarcon ◽  
Diego Giraldo-Cañas
Keyword(s):  
New Species ◽  
South America ◽  
New Records ◽  
Flag Leaf ◽  
Taxonomic Revision ◽  
High Elevation ◽  
Leaf Sheath ◽  
New Variety ◽  
The Andes ◽  
A New Species

The grass genus Poa L. is widespread throughout temperate areas of the Andes, being a common constituent in the highly diverse but threatened high-elevation páramo grasslands of northwest South America. Knowledge of Poa from these páramo areas is very limited, however, with no comprehensive taxonomic treatments available for Colombia, which contains the largest area of páramo in the Neotropics and its surrounding countries. We present a taxonomic revision of Poa for Colombia accepting 15 species, including two recent combinations of Poa previously circumscribed in Aphanelytrum (Hack.) Hack. We describe a new species, P. colombiana Soreng & Sylvester, and a new variety, P. subspicata (J. Presl) Kunth var. glabrata Soreng & Sylvester, for Colombia and Ecuador. Poa colombiana is similar to P. aequatoriensis Hack. but differs in having lemmas pubescent on the keel and marginal veins, lemma apices weakly acute, flag leaf sheath margins fused 20%–38% their length, and anthers generally larger, > 1.2 mm long. Poa subspicata var. glabrata differs from P. subspicata s. str. in having glabrous lemmas. We provide two new records for Colombia of P. huancavelicae Tovar, and P. mucuchachensis Luces. Two species, P. orthophylla Pilg. and P. reclinata (Swallen) Soreng & P. M. Peterson, are considered endemic to Colombia. Poa soderstromii Negritto & Anton is placed as a subspecies of P. orthophylla, and P. leioclada Hack. is synonymized under P. mulalensis Kunth. The names P. annua L. var. exilis Tomm. ex Freyn, P. humilis Ehrh. ex Hoffm., P. infirma Kunth, P. leioclada, P. orthophylla, P. pauciflora Roem. & Schult., P. pratensis L. subsp. irrigata (Lindm.) H. Lindb., P. puberula Steud., P. pubiflora Benth., P. subcaerulea Sm., P. subspicata, and P. trachyphylla Pilg. are lectotypified, P. mulalensis is neotypified, and P. trachyphylla is epitypified. Four species are exotic and introduced from Europe: P. annua, P. infirma, P. pratensis, and P. trivialis L. We provide a key, descriptions, illustrations, distribution and habitat information, vouchers, and notes for each species.

scholarly journals Páramo Calamagrostis s.l. (Poaceae): An updated list and key to the species known or likely to occur in páramos of NW South America and southern Central America including two new species, one new variety and five new records for Colombia

PhytoKeys ◽  
2019 ◽  
Vol 122 ◽  
pp. 29-78 ◽  
Author(s):  
Steven P. Sylvester ◽  
Robert J. Soreng ◽  
William J. Bravo-Pedraza ◽  
Lia E. Cuta-Alarcon ◽  
Diego Giraldo-Cañas ◽  
...  
Keyword(s):  
New Species ◽  
South America ◽  
Central America ◽  
Sierra Nevada ◽  
New Records ◽  
Common Species ◽  
High Elevation ◽  
New Variety ◽  
Two New Species ◽  
Southern Central

Calamagrostis (syn. Deyeuxia), as traditionally circumscribed, is one of the most speciose genera from páramo grasslands of northwest South America and southern Central America and often dominates these high-elevation habitats. However, it remains difficult for researchers to accurately identify the species due to a lack of floristic treatments for most of the countries containing páramo, with the distribution of many species still very poorly known. In an effort to ameliorate this, we present an updated list and identification keys in English and Spanish (as electronic appendix) to the species of Calamagrostis s.l. known or likely to occur in the páramos of Peru, Ecuador, Colombia, Venezuela, Costa Rica and Panama. Fifty-four species are accepted, constituting 47 species currently circumscribed in Calamagrostis and seven species recently transferred to Deschampsia. Included within this are two new species, Calamagrostiscrispifolius and Deschampsiasantamartensis, which are described and illustrated. Both new species are found in páramos of the Sierra Nevada de Santa Marta (departamento Magdalena), on the northernmost tip of Colombia, with C.crispifolius also found in the Serrania de Perija on the border with Venezuela. Calamagrostiscrispifolius differs from all other species of Calamagrostis s.l. by the presence of strongly curled, readily deciduous leaf blades, amongst numerous other characteristics including open inflorescences with generally patent branches, small spikelets, (3.5–)4–5.5 mm long, with sessile florets and a rachilla prolongation reaching from 2/3 to almost the apex of the lemma, with short hairs (< 1 mm long). Deschampsiasantamartensis is similar to Deschampsiahackelii (=Calamagrostishackelii) from austral South America but differs by its broad, rigid and erect, strongly conduplicate blades, 1.5–2.5 mm wide when folded, ligules of innovations 0.5–1 mm long, truncate or obtuse, ligules of upper flowering culms 3–4 mm long, broadly shouldered with an attenuate central point, ellipsoid spike-like panicle, 3–5.5 long × 1.5–2.5 cm wide, lemma surfaces moderately to lightly scabrous between the veins, lemma apex acute to muticous, entire, rachilla extension often absent and inside of the floret often with hyaline shiny sinuous trichomes to 1 mm long, emerging from the base of the ovary. We also present a broader circumscription of the common species Deschampsiapodophora (=Calamagrostispodophora), with the new variety D.podophoravar.mutica described and illustrated. Deschampsiapodophoravar.mutica principally differs from var. podophora by florets lacking awns and larger habit i.e. multiple taller culms with longer and wider leaf blades forming tussocks, with inflorescences often held within sheaths. Nomenclatural changes are presented, with Deyeuxiamacrostachya newly synonymised under C.macrophylla and C.pittieri, C.pubescens and Deyeuxiapubescens newly synonimised under C.planifolia. Lectotypes are designated for Agrostisantoniana, Calamagrostispisinna, Deyeuxiamacrostachya and Deyeuxiasodiroana. We also document and give notes on five new records of Calamagrostis for Colombia: C.carchiensis, C.guamanensis, C.heterophylla, C.pisinna and C.rigida.

scholarly journals A new species of the catfish genus Cordylancistrus (Siluriformes, Loricariidae) from the Sierra Nevada de Santa Marta, Colombia

Zootaxa ◽  
2017 ◽  
Vol 4329 (3) ◽  
pp. 256
Author(s):  
FRANCISCO PROVENZANO R. ◽  
NADIA MILANI ◽  
CARLOS ARDILA R.
Keyword(s):  
New Species ◽  
South America ◽  
Sierra Nevada ◽  
Related Species ◽  
Caribbean Sea ◽  
Geological History ◽  
The Andes ◽  
History Of ◽  
Magdalena River ◽  
A New Species

As a part of an assessment of loricariid catfishes inhabiting the Andes of Colombia, specimens belonging to an interesting new species were identified. The new species is described herein, and it is tentatively included in the genus Cordylancistrus. The new species can be easily distinguished among its congeners by the presence of a unique diagnostic character: a fleshy keel or excrescence, black or dark brown, over the posterior tip of supraoccipital. Specimens of the new species were captured in rivers of the Sierra Nevada de Santa Marta and the Sierra de Perijá that drain to the Magdalena River Basin and Caribbean Sea. The occurrence of one species of Cordylancistrus in the Sierra Nevada de Santa Marta could have interesting biogeographic implications for hypotheses related to the geological history of northwestern corner of South America or to the dispersal or vicariance models used to explain biogeographical patterns of related species in Colombia. 

The arachnid order Schizomida in the Brazilian Atlantic Forest: a new species of Rowlandius and new records of Stenochrus portoricensis (Schizomida: Hubbardiidae)

Zootaxa ◽  
2008 ◽  
Vol 1850 (1) ◽  
pp. 53 ◽  
Author(s):  
ADALBERTO J. SANTOS ◽  
SIDCLAY C. DIAS ◽  
ANTONIO D. BRESCOVIT ◽  
POLLYANNA P. SANTOS
Keyword(s):  
New Species ◽  
South America ◽  
Atlantic Forest ◽  
New Records ◽  
Northeastern Brazil ◽  
Brazilian Atlantic Forest ◽  
Forest Reserve ◽  
New Evidence ◽  
A New Species ◽  
Cocoa Plantation

Two species of hubbardiid microwhipscorpions (Schizomida: Hubbardiidae) are recorded from the Brazilian Atlantic Forest. Rowlandius linsduarteae sp. nov. is described and illustrated based on specimens from Mata do Buraquinho forest reserve, João Pessoa, state of Paraíba, northeastern Brazil. This species is apparently related to Rowlandius sul Cokendolpher & Reddell 2000, the only species of the genus known from continental South America, and represents new evidence of a biogeographic relationship between Amazonia and the northeastern Brazilian Atlantic Forest. Stenochrus portoricensis Chamberlin, a widely distributed species, is newly recorded from the states of São Paulo and Bahia, respectively, in southeastern and northeastern Brazil. The latter record refers to several female specimens associated with abandoned arboreal termite nests in a cocoa plantation.

A revision of the Neotropical genus Metasiphonella Duda, 1930 (Diptera: Chloropidae)

Zootaxa ◽  
2020 ◽  
Vol 4885 (3) ◽  
pp. 437-446
Author(s):  
PAULA RAILE RICCARDI ◽  
ZEINAB BAZYAR ◽  
BARBARA ISMAY
Keyword(s):  
New Species ◽  
Costa Rica ◽  
South America ◽  
Taxonomic Revision ◽  
External Morphology ◽  
Monotypic Genus ◽  
A New Species

The monotypic genus Metasiphonella, originally described from Costa Rica, is now formally recorded from South America with a new species from Brazil—M. amorimi sp. nov. The taxonomic revision includes a detailed description of adult external morphology, female and male terminalia, and the egg stage for all species. A lectotype of M. magnifica Duda is designated and new country records are given. 

On a new Melanosuchus species (Alligatoroidea: Caimaninae) from Solimões Formation (Eocene-Pliocene), Northern Brazil, and evolution of Caimaninae

Zootaxa ◽  
2020 ◽  
Vol 4894 (4) ◽  
pp. 561-593
Author(s):  
JONAS PEREIRA DE SOUZA-FILHO ◽  
EDSON GUILHERME ◽  
PETER MANN DE TOLEDO ◽  
ISMAR DE SOUZA CARVALHO ◽  
FRANCISCO RICARDO NEGRI ◽  
...  
Keyword(s):  
New Species ◽  
South America ◽  
Phylogenetic Inference ◽  
Generalist Predator ◽  
Quantitative Morphology ◽  
Upper Miocene ◽  
The Andes ◽  
Geological Unit ◽  
Northern Brazil ◽  
A New Species

The Solimões Formation (Eocene-Pliocene) is a well-known geological unit due to the great diversity of crocodylian species. Here we describe a new species of Melanosuchus, M. latrubessei sp. nov., from the Talismã locality, state of Amazonas, from the Upper Miocene of the Solimões Formation (Solimões Basin, Brazil). A new phylogenetic inference focused on Caimaninae is provided and the different evolutionary scenarios involving this new species are discussed. In addition, quantitative morphology studies are carried out and comments regarding the paleoecology aspects of this new species are made. M. latrubessei represents a medium-sized generalist predator, being proportional to the medium-sized M. niger. This new species inhabited the drainages of the Solimões Formation and was ecologically related to other taxa of crocodylians during the proto-Amazon Miocene. The evolutionary advantages of Melanosuchus genus are discussed to better understand the biogeographical occurrence of M. niger in South America, a species which survives to this day in contrast to several other species that became extinct during the Miocene-Pliocene periods. The extinction of the Miocene-Pliocene crocodylian taxa of the Solimões Formation, including Melanosuchus latrubessei, seems to be directly related with the uplift of the northern portions of the Andes, which generated significantly changes in drainages and Amazon paleoenvironments. 

Bomarea rinconii (Alstroemeriaceae), a new species from the Talamanca Mountains in Chiriqui Province, Panama

Phytotaxa ◽  
2013 ◽  
Vol 105 (1) ◽  
pp. 21
Author(s):  
DANIEL ADOLFO CÁCERES GONZÁLEZ
Keyword(s):  
New Species ◽  
South America ◽  
Greater Antilles ◽  
Southern South America ◽  
The Andes ◽  
A New Species

Bomarea Mirbel (1804: 71; Alstroemeriaceae) includes 122 species (Govaerts 2013) and is divided into four subgenera (Hofreiter & Tillich 2002): Baccata (five species), Bomarea (ca. seventy species), Sphaerine(twelve species) and Wichuraea (eighteen species). Bomarea is distributed from Mexico and the Greater Antilles to southern South America (Gereau 1994). The centre of distribution of the genus is along the Andes from Colombia to Bolivia (Hofreiter 2008).

Taxonomic revision of the Colombian Tityus (Archaeotityus) (Scorpiones, Buthidae) species: a morphological and morphometric approach, with a description of a new species

Zootaxa ◽  
2019 ◽  
Vol 4660 (1) ◽  
pp. 1-94
Author(s):  
JAIRO A. MORENO-GONZÁLEZ ◽  
RANULFO GONZÁLEZ O. ◽  
EDUARDO FLÓREZ D.
Keyword(s):  
Principal Component Analysis ◽  
New Species ◽  
New Records ◽  
Principal Component ◽  
Taxonomic Revision ◽  
Component Analysis ◽  
Morphological Characters ◽  
Species Level ◽  
Qualitative And Quantitative ◽  
A New Species

We present a taxonomic revision of the Colombian Tityus (Archaeotityus) species based on morphological and morphometric evidence. We examined more than 385 specimens and evaluated new and previously used qualitative and quantitative morphological characters. We redescribe the Colombian species and present morphological characters for both sexes and an emended diagnosis for the subgenus Tityus (Archaeotityus). We describe a new species Tityus guane sp. nov. from Santander department, Colombia, Tityus betschi Lourenço 1992 is synonymized with Tityus parvulus Kraepelin, 1914, and Tityus wayuu Rojas-Runjaic & Armas, 2007 is synonymized with Tityus tayrona Lourenço, 1991. We measured 186 specimens and performed a multivariate principal component analysis (PCA) for 34 selected morphometric ratios for each sex. We found that a few morphological ratios support species level distinctions within the Colombian species. We provide updated distributional maps with new records and an identification key for both sexes. Furthermore, we provide an updated checklist for the subgenus and a discussion about the character systems used within Tityus (Archaeotityus). The new morphological characters proposed and the traditional morphometry examined with a PCA are useful for studying Tityus (Archaeotityus) taxonomy.

A taxonomic revision of Atelopus pachydermus, and description of two new (extinct?) species of Atelopus from Ecuador (Anura: Bufonidae)

Zootaxa ◽  
2007 ◽  
Vol 1557 (1) ◽  
pp. 1-32 ◽  
Author(s):  
LUIS A. COLOMA ◽  
STEFAN LÖTTERS ◽  
WILLIAM E. DUELLMAN ◽  
ALFONSO MIRANDA-LEIVA
Keyword(s):  
New Species ◽  
Taxonomic Revision ◽  
Iucn Red List ◽  
Red List ◽  
Current Evidence ◽  
Peruvian Andes ◽  
The Andes ◽  
Two New Species ◽  
Iucn Red List Criteria ◽  
A New Species

Atelopus pachydermus is redescribed on the basis of the retraced holotype and recently collected specimens. Comparisons with the holotype confirmed that this species occurs neither in Pacific Colombia, nor in the northeastern Cordillera of Ecuador, as proposed by previous authors. It occurs in the northwestern Andes of Peru and adjacent Ecuador. Populations from the Cordillera Oriental in northern Ecuador (some of them previously allocated to A. pachydermus) are described as a new species, which is distinguished from other Atelopus by size, coloration, and by having white digital pads that contrast with adjacent black phalanges. In addition, a population of Atelopus from the Andes of southwestern Ecuador, previously included in the Atelopus bomolochos complex, and having an aqua blue iris is described as a new species. We include osteological data of both new species. Predictions of numbers of species of Atelopus to be discovered and described, as well as of numbers for Ecuadorian amphibian diversity, indicates that these faunas are yet largely undescribed. Because recent records of A. pachydermus and the two new species are lacking despite search efforts, we assume that they are possibly extinct, similar to many other Andean Atelopus. Thus, we categorize these species either aspossibly extinct or, applying IUCN Red List criteria, as Critically Endangered. Current evidence suggests that amphibian extinctions in the Ecuadorian and Peruvian Andes have been more drastic than previously recognized.

A new synanthropic species of Charinus Simon, 1892 from Brazilian Amazonia and notes on the genus (Arachnida: Amblypygi: Charinidae)

Zootaxa ◽  
2011 ◽  
Vol 2980 (1) ◽  
pp. 61 ◽  
Author(s):  
GUSTAVO SILVA DE MIRANDA ◽  
ALESSANDRO PONCE DE LEÃO GIUPPONI
Keyword(s):  
New Species ◽  
South America ◽  
New Records ◽  
First Record ◽  
Brazilian Amazonia ◽  
Brazilian Species ◽  
Synanthropic Species ◽  
The Family ◽  
Porto Velho ◽  
A New Species

A new species of the genus Charinus—C. vulgaris— is described from Porto Velho, Rondônia. This is the first record of the family Charinidae from the Brazilian Amazonia and of a synanthropic species in South America. Additionally, two new records of the genus for Brazil are made and a key to the Brazilian species of the genus is given.

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