scholarly journals On the taxonomy and systematics of the recently described Lycodon deccanensis Ganesh, Deuti, Punith, Achyuthan, Mallik, Adhikari, Vogel, 2020 (Serpentes, Colubridae) from India

2020 ◽  
Vol 4 (2) ◽  
pp. 109-118
Author(s):  
Yatin Kalki ◽  
Sachin Gowda ◽  
Manu Agnivamshi ◽  
Karthik Singh ◽  
Harshil Patel ◽  
...  
Keyword(s):  
Phylogenetic Relationship ◽  
Cytochrome B ◽  
Molecular Phylogenetics ◽  
Sequence Divergence ◽  
Molecular Data ◽  
Type Locality ◽  
Mitochondrial Cytochrome ◽  
Type Series ◽  
Mitochondrial Cytochrome B ◽  
Mitochondrial Cytochrome B Gene

Lycodon deccanensis Ganesh, Deuti, Punith, Achyuthan, Mallik, Adhikari, Vogel, 2020 was recently described from the Mysore plateau of Karnataka based solely on morphology but lacking in-depth descriptions and comparisons. A scrutiny of the description reveals that the type series, of two specimens, comprise specimens of two different species along with discrepancies throughout the paper. Surveys conducted near the type locality of the species led to the discovery of additional specimens, which allow us to provide an elaborate description of the species and present data on its phylogenetic relationship with members of the genus and comments on the systematics of Lycodon of India. Results from molecular phylogenetics suggest that Lycodon deccanensis is a member of the L. aulicus clade based on molecular data for mitochondrial cytochrome b gene and shows an un-corrected p-distance (sequence divergence) of 14–17% from other members of the Lycodon aulicus clade.

Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species

Zootaxa ◽  
2019 ◽  
Vol 4552 (1) ◽  
pp. 1 ◽  
Author(s):  
LESLEY S. DE SOUZA ◽  
DONALD C. TAPHORN ◽  
JONATHAN W. ARMBRUSTER
Keyword(s):  
New Species ◽  
Cytochrome B ◽  
Dna Sequences ◽  
Sequence Divergence ◽  
Cytochrome B Gene ◽  
Guiana Shield ◽  
Mitochondrial Cytochrome ◽  
Tissue Samples ◽  
Mitochondrial Cytochrome B ◽  
Mitochondrial Cytochrome B Gene

The Orinoco Andes and northwestern Guiana Shield (Essequibo, Orinoco, Branco, and upper Negro) were found to contain 11 species of Ancistrus, six of which are new. We additionally examine A. brevifilis from the Río Tuy of Venezuela and A. trinitatis from the island of Trinidad. The species in the region can be broken up into dorsoventrally flattened species (A. leoni new species, A. lithurgicus, and A. macropthalmus), white to yellow-dotted species (A. kellerae new species, A. nudiceps, and A. patronus new species), wide-jawed species (A. amaris new species and A. yutajae new species), and white-spotted species (A. brevifilis, A. leucostictus, A. trinitatis, A. saudades new species, and A. triradiatus). Distributions of Ancistrus support the Proto-Berbice hypothesis as A. saudades is found in the upper reaches of the Ventuari, Caura, and Caroni rivers, which were thought to have once flowed into the Proto-Berbice. In addition, although A. nudiceps does not appear to have split once the Takutu River was captured by the Branco, the progenitor of A. leucostictus and A. saudades did speciate with the populations on either side of the Rupununi Portal differing by 7% sequence divergence of the mitochondrial Cytochrome b gene. Besides the descriptions of the new species, we redescribe the others occurring in the area, and adjacent watersheds. We provide a key for their identification, and a preliminary hypothesis of relationships based on DNA sequences of the few species for which tissue samples are available. 

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