scholarly journals Uterine and eggshell modifications associated with the evolution of viviparity in South American water snakes (Helicopsspp.)

2018 ◽  
Vol 330 (3) ◽  
pp. 165-180 ◽  
Author(s):  
Henrique B. Braz ◽  
Selma M. Almeida-Santos ◽  
Christopher R. Murphy ◽  
Michael B. Thompson
Keyword(s):  
South American ◽  
Water Snakes

scholarly journals Taxonomy, allometry, sexual dimorphism, and conservation of the trans-Andean water-snake Helicops danieli Amaral 1937 (Serpentes: Dipsadidae: Hydropsini).

2021 ◽  
Author(s):  
Nathalie Kaladinsky Citeli ◽  
Julia Klaczko ◽  
Anderson Kennedy Soares De-Lima ◽  
Mariana de-Carvalho ◽  
Pedro M.S. Nunes ◽  
...  
Keyword(s):  
Sexual Dimorphism ◽  
Intraspecific Variation ◽  
Conservation Status ◽  
Tail Length ◽  
South American ◽  
Color Changes ◽  
Morphological Aspects ◽  
Water Snake ◽  
Morphological Diagnosis ◽  
Water Snakes

The extensive lack of knowledge on the morphological aspects of South American water-snakes, includes a poor understanding of phenotypic parameters, intraspecific variation, and conservation of the trans-Andean Helicops species, Helicops danieli Amaral, 1937. For the first time, we provide a multidisciplinary view using key features (e.g., morphology and niche modeling) to improve the taxonomic recognition of this species, as well as describing ontogenetic color changes, allometry, sexual dimorphism, and the conservation status of this poorly studied snake. First, we emended the morphological diagnosis of H. danieli with 23 characters and detected that juvenile tail length is positively related to allometric growth, and that juveniles differ from adults through the presence of the white nuchal collar. Females are larger than males for snout-vent length, whereas males showed proportionally longer tails and smaller head length growth. Suitable areas for H. danieli are restricted to the trans-Andean regions from the Magdalena drainage to the Caribbean coast, which also showed high values of anthropic impacts. Our multidisciplinary approach provided new insights into this South American water snake’s morphology, intraspecific variation, and distribution.

Emergence of New Potential Insect Pests of Date Palm: Could Climate Change Be the Reason?

2019 ◽  
Vol 30 (6) ◽  
pp. 242-245
Author(s):  
Hamadttu A. F. El-Shafie
Keyword(s):  
Climate Change ◽  
Date Palm ◽  
Insect Pests ◽  
Anthropogenic Activities ◽  
Economic Damage ◽  
South American ◽  
Palm Fruit ◽  
The Family ◽  
American Palm ◽  
Sorghum Chafer

Four insect species were reported as new potential pests of date palm in recent years. They are sorghum chafer (Pachnoda interrupta), the rose chafer (Potosia opaca), the sericine chafer beetle (Maladera insanablis), and the South American palm borer (Pysandisia archon). The first three species belong to the order Coleoptera and the family Scarabaeidae, while the fourth species is a lepidopteran of the family Castniidae. The injury as well as the economic damage caused by the four species on date palm need to be quantified. Due to climate change and anthropogenic activities, the date palm pest complex is expected to change in the future. To the author's knowledge, this article provides the first report of sorghum chafer as a pest damaging date palm fruit.

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