scholarly journals A Synopsis of Croton (Euphorbiaceae) in Michoacán, Mexico

Taxonomy ◽  
2021 ◽  
Vol 1 (4) ◽  
pp. 395-424
Author(s):  
Victor W. Steinmann

A taxonomic and nomenclatural review of the genus Croton (Euphorbiaceae) in the Mexican state of Michoacán is presented. Six sections and 20 species are here reported. The greatest diversity is in the Balsas Depression province, where at least 12 species occur. There is a strong tendency to thrive in tropical deciduous forest. An identification key is provided, and for each species, the following information is included: protologue citation, type information, habit, habitat, and elevation within the state, regional and global distribution, and phenology. Relevant synonyms are listed, as too are herbarium specimens. Lectotypes are designated for Croton draco, C. niveus, and C. calvescens. One species, Croton rojasii, is described as new and illustrated with photos. It is known only from tropical deciduous forest in the Zicuirán-Infiernillo Biosphere Reserve, at elevations from 400 to 700 m. It belongs to sect. Geiseleria and is remarkable because of the strongly unequal pistillate sepals, the larger of which becoming accrescent and exceeding the fruit.

2017 ◽  
pp. 55
Author(s):  
Valeria Angélica Pulido-Esparza ◽  
Ana Rosa López-Ferrari ◽  
Adolfo Espejo-Serna

The state of Guerrero is interesting because of its rich and peculiar Bromeliad flora that includes a large number of endemic species. Based on the study of 1,250 herbarium specimens corresponding to 797 collections, and a detailed bibliographic revision we conclude that the Bromeliad flora known up to now for Guerrero comprises 88 species and 11 genera. The genera Racinaea and Ursulaea and the species Catopsis berteroniana, Hechtia reflexa, Racinaea ghiesbreghtii, Tillandsia andrieuxii, T. gymnobotrya, T. magnusiana, T. marabascoensis, T. polystachia, T. rettigiana, T. tricolor and Ursulaea tuitensis, are recorded for the first time for Guerrero. The states whose Bromeliad flora is most similar to that of Guerrero are Jalisco, Michoacán and Colima, followed by State of México and Morelos. Among the vegetation types occurring in the state, Quercus forest is the richest with 42 taxa, followed by tropical deciduous forest with 33 and tropical subdeciduous forest with 27. The vegetation type with the lowest species number is the Juniperus forest. Finally, an updated catalogue of the Bromeliaceae from the state of Guerrero, including keys to genus and species identification, is presented; also, the species representation and distribution are analized in detail.


2017 ◽  
pp. 21
Author(s):  
Jorge Martínez-Meléndez ◽  
Miguel Ángel Pérez-Farrera ◽  
Oscar Farrera-Sarmiento

A total of 502 species that belong to 115 families and 301 genera were recorded for Mt. El Cebu and adjacent zones in Polygon V of the El Triunfo Biosphere Reserve. The most speciose families were Orchiclaceae, Fabaceae, Asteraceae, Bromeliaceae and polypodiaceae with 58, 29, 28, 17, and 17 species, respectively. Six plant communities were recognized in the area, among which the cloud forest was the most diverse with 234 species, followed by pine-oak fore st with 150 species, and the tropical rain forest with 127. The oak forest and the tropical deciduous forest were less diverse, with 71 and 39 species, respectively. Only 13 species are included in the Mexican red list of endangered taxa.


Phytotaxa ◽  
2016 ◽  
Vol 275 (2) ◽  
pp. 181
Author(s):  
JOB KUIJT ◽  
VICTOR W. STEINMANN

Phoradendron longicaule (Viscaceae), a new, nearly leafless species of mistletoe from the Infiernillo-Zicuirán Biosphere Reserve of southern Michoacán, Mexico, is described and illustrated.  It occurs in a tropical deciduous forest at elevations of 400 to 500 m, and all known hosts belong to Fabaceae. The long, straight, pendulous stems and elongated vegetative internodes are distinctive features. It is most similar to P. nudum but differs by having 3 or 4 pistillate flowers per fertile bract, expanded albeit highly reduced leaves, and longer vegetative internodes. It is also similar to P. teretifolium from which it differs by having a pendulous habit, longer vegetative internodes, 3 or 4 pistillate flowers per fertile bract, and fruits on short internodes.


Zootaxa ◽  
2008 ◽  
Vol 1750 (1) ◽  
pp. 59 ◽  
Author(s):  
LUIS CANSECO-MÁRQUEZ ◽  
GUADALUPE GUTIÉRREZ-MAYEN ◽  
ANDRÉS ALBERTO MENDOZA-HERNÁNDEZ

A new species of Lepidophyma from the Biosphere Reserve area of Tehuacan-Cuicatlan, Oaxaca, Mexico, is described. This new species, Lepidophyma cuicateca sp. nov., is known from two areas in the Cuicatlan Valley. Lepidophyma cuicateca sp. nov. is a member of the Lepidophyma gaigeae species Group and is characterized by its small body size, small size of tubercular body scales, poorly differentiated caudal whorls and interwhorls, and relatively large dorsal, ventral and gular scales. It lives in shady places, below rocks along the Apoala River, and is commonly found in plantain, sapodilla, cherimoya, mango and coffee plantations, as well as tropical deciduous forest. The description of L. cuicateca sp. nov. increases the number of species in the L. gaigeae Group to five.


Phytotaxa ◽  
2016 ◽  
Vol 269 (2) ◽  
pp. 113 ◽  
Author(s):  
JORGE GUTIÉRREZ ◽  
TERESA TERRAZAS ◽  
ELOY SOLANO

Petronymphe rara is described and illustrated as a new species, endemic to the state of Oaxaca, Mexico, which develops in gypsum soils in the tropical deciduous forest of the Oaxacan Mixteca Alta. This species differs from P. decora, the latter distributed in the state of Guerrero, Mexico, in leaf shape, floral tube size and color and stamen size. We also report the rediscovery of P. decora, a species not collected since 1949 and described in 1951 by Harold E. Moore, including a complete morphological description. In addition, we present an expanded genus description to accommodate the new species.


1999 ◽  
Vol 4 (1) ◽  
pp. 53 ◽  
Author(s):  
Constantino Orduña Trejo ◽  
Alondra Castro Campillo ◽  
José Ramírez Pulido

 Resumen: Se examinaron 568 ejemplares de mamíferos nativos de 49 especies, procedentes de 49 localidades de la Meseta Tarasca o Sierra Purépecha del Estado de Michoacán, México. Las especies encontradas en esta región del Eje Volcánico Transversal incluyen 1 marsupial, 2 insectívoros, 17 quirópteros, 2 carnívoros, 24 roedores y 1 lagomorfo. Para calcular la diversidad de especies en los cuatro hábitats muestreados, se utilizaron las 2 especies de insectívoros y 21 de roedores. De mayor a menor diversidad, en el bosque de pino-encino se recolectaron 201 individuos de 15 especies (H’ = 2.49), en el bosque tropical caducifolio 142 de 15 especies (H’ = 2.43), en el bosque de oyamel 92 individuos de 10 especies (H’ = 2.01) y en las áreas de ecotono 52 individuos de cuatro especies (H’ = 1.15). El registro de Hylonycteris underwoodi es el primero para las partes altas del Estado de Michoacán. Abstract: We examined 568 specimens of native mammals belonging to 47 species from 49 localities of the Tarascan Plateau or Sierra Purépecha mountain range in the State of Michoacán, México. Species composition of this enclave in the Transvolcanic Belt is 1 marsupial, 2 insectivores, 17 bats, 2 carnivores, 24 rodents, and 1 lagomorph. To calculate the species diversity according to the four sampled habitats, only the 2 insectivore and 21 rodent species were included. From higher to lower diversity values, we found 201 specimens from 15 species in pine-oak forest (H’ = 2.49), 142 from 15 species in tropical deciduous forest (H’ = 2.43), 92 specimens belonging to 10 species fir forest (H’ = 2.01), and 52 from four species in an ecotonal area (H’ =1.15). Hylonycteris underwoodi is the first record for the highlands from the State of Michoacan. Key words: Mammals, distribution, diversity, Tarascan Plateau, Michoacán.


2018 ◽  
Vol 67 ◽  
pp. 63-83
Author(s):  
Roger Cauich-Kumul ◽  
Hugo Delfín-González ◽  
Abdiel Martín-Park ◽  
Pablo Manrique-Saide ◽  
Víctor López-Martínez

The species diversity composition and phenological behaviour of four braconid subfamilies (Hymenoptera: Braconidae: Agathidinae, Braconinae, Doryctinae and Macrocentrinae) were monitored in three vegetation communities (dune vegetation, tropical deciduous forest and savannah) of the Ria Lagartos Biosphere Reserve (RLBR) in Yucatan, Mexico. Braconid wasps were collected with Malaise traps every 15 days over one year (June 2008 to June 2009). A total of 2,476 specimens were inventoried comprising 233 species and 63 genera. The composition of braconids and their lifestyles differed among the three vegetation communities studied. Doryctinae was the most diverse and abundant subfamily in RLBR (40 genera, 145 species, 990 specimens) and the tropical deciduous forest recorded the maximum abundance and diversity (H’= 4.1; alpha value= 1.059), with 61 exclusive species. Phenological sequence indicates an influence of the rainy season in braconid diversity, but its effects differed among braconid subfamilies and among the vegetation communities. Finally, the importance of the RBRL as a conservation site for this hymenopterous wasp is discussed.


2017 ◽  
pp. 47 ◽  
Author(s):  
Eva M. Cué-Bär ◽  
José Luis Villaseñor ◽  
Libertad Arredondo-Amezcua ◽  
Guadalupe Cornejo-Tenorio ◽  
Guillermo Ibarra-Manríquez

Based on the review of floristic and taxonomic literature, as well as on the examination of specimens housed at the herbaria of the Centro Regional del Bajío (IEB) and the Instituto de Biología (MEXU), we recorded 845 species, 352 genera and 100 families of trees for the state of Michoacán, Mexico. The largest numbers of species per family were recorded for Asteraceae (82), Fabaceae (74), Mimosaceae (67), Caesalpiniaceae (39) and Burseraceae (38), while at the genus level Bursera (37), Quercus (35), Lonchocarpus (19), Senna (18), and Acacia (16) are the most speciose. The genus Beiselia (Burseraceae) and 14 species (1.8 %) are strict endemics to the state. A total of 28 families (28%) and 210 genera (60%) are represented in the state only by one tree species each. The most important vegetation types according to their species richness are tropical deciduous forest (593, 70.2%), coniferous forest (336, 39.8%) and oak forest (332, 39.3%). A high proportion (69.9%) of Michoacán’s tree species is located in 2-4 vegetation types; 173 species (21.5%) have been found just in one type, mainly in the tropical dry forest (87 species, 10.3%). The floristic richness of Michoacán is largely explained by its complex geologic history, its rugged physiography, its diverse climate, and its multiple vegetation types, as well as by its location at the confluence of the Holartic and Neotropical floristic kingdoms. Counties and species on which to focus conservation efforts for trees in the state are pinponted.


2019 ◽  
Vol 28 (2) ◽  
pp. 137-143
Author(s):  
Nancy Collins ◽  
Isabel Margarita Coronado González ◽  
Bruno Victor Alfons Govaerts

A new species of Oecanthus is described from Mexico. Oecanthus mhatreaesp. nov. occurs in central Mexico in the understory of tropical deciduous forest. Oecanthus mhatreaesp. nov. is currently known only from the Corregidora area of the Mexican state of Querétaro. The widened tegmina and chirp-like brief trills song are consistent with some members of the rileyi species group; however, this new species of tree cricket is different in several aspects. The chirp-like brief trills are generally irregularly spaced, it does not have the expected grouping of the chirp pulses, and the colors of buff, light olive green, or light brown are vastly different than the four known pale green species in the rileyi species group of the Western Hemisphere. Morphology, habitat, and song details of this new species, with the common name of Otomi tree cricket, are provided in this paper. Video can be viewed at www.oecanthinae.com.


2019 ◽  
Vol 28 (2) ◽  
pp. 137-143
Author(s):  
Nancy Collins ◽  
Isabel Margarita Coronado González ◽  
Bruno Victor Alfons Govaerts

A new species of Oecanthus is described from Mexico. Oecanthus mhatreaesp. nov. occurs in central Mexico in the understory of tropical deciduous forest. Oecanthus mhatreaesp. nov. is currently known only from the Corregidora area of the Mexican state of Querétaro. The widened tegmina and chirp-like brief trills song are consistent with some members of the rileyi species group; however, this new species of tree cricket is different in several aspects. The chirp-like brief trills are generally irregularly spaced, it does not have the expected grouping of the chirp pulses, and the colors of buff, light olive green, or light brown are vastly different than the four known pale green species in the rileyi species group of the Western Hemisphere. Morphology, habitat, and song details of this new species, with the common name of Otomi tree cricket, are provided in this paper. Video can be viewed at www.oecanthinae.com.


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