Posts Tagged ‘identification’


Koloti genus

Abstract:

The monophyly and phylogenetic position of Diplocentrus Peters, 1861, has remained ambiguous since the first published phylogenetic analysis of diplocentrid relationships, in which it was rendered paraphyletic by the placement of exemplar species from two other diplocentrid genera, Bioculus Stahnke, 1968, and Didymocentrus Kraepelin, 1905. The discovery of two diplocentrids with neobothriotaxic pedipalps, Diplocentrus magnus Beutelspacher and López-Forment, 1991, and Diplocentrus poncei Francke and Quijano-Ravell, 2009, from the central Mexican states of Guerrero and Michoacán, respectively, raised further questions about the limits of Diplocentrus. A recent phylogenetic analysis of 29 species of Diplocentrus and five exemplar species of the most closely related genera, based on 95 morphological characters and 4202 aligned nucleotides from DNA sequences of five markers in the nuclear and mitochondrial genomes, recovered the monophyly of Diplocentrus, excepting two neobothriotaxic species from central Mexico, justifying their removal from Diplocentrus. In the present contribution, Kolotl, n. gen. is created to accommodate the two species, Kolotl magnus (Beutelspacher and López-Forment, 1991), n. comb., and Kolotl poncei (Francke and Quijano-Ravell, 2009), n. comb., and both are redescribed.
Picture from the Scorpion Files Blog site.
American Museum of Natural History at the Digital Library.
URL @ http://digitallibrary.amnh.org/dspace/handle/2246/5465

syntropinae2

Abstract

The first rigorous analysis of the phylogeny of the North American vaejovid scorpion subfamily Syntropinae is presented. The analysis is based on 250 morphological characters and 4221 aligned DNA nucleotides from three mitochondrial and two nuclear gene markers, for 145 terminal taxa, representing 47 species in 11 ingroup genera, and 15 species in eight outgroup genera. The monophyly and composition of Syntropinae and its component genera, as proposed by Soleglad and Fet, are tested. The following taxa are demonstrated to be para- or polyphyletic: Smeringurinae; Syntropinae; Vaejovinae; Stahnkeini; Syntropini; Syntropina; Thorelliina; Hoffmannius; Kochius; and Thorellius. The spinose (hooked or toothed) margin of the distal barb of the sclerotized hemi-mating plug is demonstrated to be a unique, unambiguous synapomorphy for Syntropinae, uniting taxa previously assigned to different subfamilies. Results of the analysis demonstrate a novel phylogenetic relationship for the subfamily, comprising six major clades and 11 genera, justify the establishment of six new genera, and they offer new insights about the systematics and historical biogeography of the subfamily, and the information content of morphological character systems.

Direct Link at http://onlinelibrary.wiley.com/doi/10.1111/cla.12091/abstract.

Thanks to the Scorpion Files posting the news.  Its been a long time coming to see the results from the Scorpion Lab at AMNH.

Summary
A new scorpion species, Vaejovis grayae sp. nov. is described and placed in the “vorhiesi” group of the genus Vaejovis. This small brown species is found near Yarnell, Arizona, USA. It appears most similar to V. trinityae Ayrey and V. crumpi Ayrey et Soleglad. It can be distinguished from the other members of the “vorhiesi” group by aunique combination of non-overlapping morphological characters and multilocus DNA data (Bryson et al., 2013). The pedipalp fixed finger has 6 ID denticles and the movable finger has 7, like most other northern Arizona “vorhiesi” group species. Another characteristic of this species is its unique Arizona chaparral habitat.

grayae

Published at Euscorpius Online Journal:  Occasional papers in scorpiology

PDF:  http://www.science.marshall.edu/fet/euscorpius/p2014_188.pdf

See more with Rich’s web site at AZScorpion.com

Abstract

A new species of the genus Diplocentrus Peters, 1861 is described, based on several specimens collected in the Mexican state of Oaxaca. It is characterized by a high telotarsal spiniform setae count (4-5/5:5/6:6/6:6/6-7), and the pectinal tooth counts of 12–15, mode = 13 (male) or 11–13, mode = 12 (female). With the description of this species, the diversity of the genus is increased to 51 species in Mexico.

Introduction

The genus Diplocentrus Peters, 1861 comprises nearly 60 species, 51 of them are distributed in Mexico, is the most diverse genus in the family Diplocentridae Karsch, 1880 (Santibáñez-López et al. 2013a). The Mexican species were divided in two groups by Hoffmann (1931), based on size and coloration. Francke (1977) redefined the groups in a key to identification of the Diplocentrus species occurring in the Mexican state of Oaxaca, based on cheliceral and pedipalp femur ratios, and renamed the whitei group to mexicanus group because it included type species (Diplocentrus mexicanus Peters, 1861). Nevertheless, Francke (1978) realized that the distinction of both groups was problematic because the diagnostic characters of the pedipalp femur were also used to separate other genera in the family. Recently, Santibáñez-López et al. (2013a) presented an operational diagnosis for the keyserlingii group; but did not assume that it was monophyletic, pending further investigation of Diplocentrus phylogeny. Fifteen species are reported for the Mexican state of Oaxaca, nine of them belong to the keyserlingii group, and six to the mexicanus group. In the present contribution, Diplocentrus franckei, sp. n. from the mexicanus group is described from Oaxaca, Mexico; it is compared to its most morphological similar species.

Citation: Santibáñez-López CA (2014) A new species of the genus Diplocentrus Peters, 1861 (Scorpiones, Diplocentridae) from Oaxaca, Mexico. ZooKeys 412: 103–116

zookeys-412-103-g006zookeys-412-103-g003zookeys-412-103-g005

 

Genus Kovarikia, gen. nov. (Scorpiones: Vaejovidae) is described from southern California, USA. The genus is composed of three species previously placed in Pseudouroctonus: Kovarikia williamsi (Gertsch et Soleglad, 1972),comb. nov. (type species), K. bogerti (Gertsch et Soleglad, 1972), comb. nov., and K. angelena (Gertsch et Soleglad, 1972), comb. nov. Major diagnostic characters of Kovarikia are its unique neobothriotaxy found on the ventral surface of the pedipalp chelae, the occurrence of a secondary lamellar hook on the hemispermatophore, a crescent-shaped mating plug barb, the presence of a secondary exteromedian (EMc) carina on the pedipalp patella,and a swollen telson vesicle with anterior vesicular ridges. kovarikiaURL link:  http://www.science.marshall.edu/fet/euscorpius/p2014_185.pdf

Summary
A new scorpion species, Vaejovis trinityae sp. nov. is described. This small brown species is found along the Mogollon Rim above Strawberry, Arizona. This is the first description of a new species of the “vorhiesi” group scorpions whose DNA phylogenetic analysis was published (Bryson et al., 2013); based on DNA data, the new species is most related to V. lapidicola Stahnke and V. crumpi Ayrey et Soleglad. It represents one of the “twenty-seven geographically cohesive lineages inferred from the mtDNA tree”. A unique characteristic of this species is that it exhibits arboreal behavior, being frequently found on Ponderosa pine trees.

URL:  http://www.science.marshall.edu/fet/euscorpius/p2013_176.pdf

New book released in July 2010:
Texts and photos : Roland STOCKMANN & Éric YTHIER
Foreword by Victor FET
© 2010
http://scorpionsworld.com/
Updated: 09.27.10

I received an email (04.21.10) with photos for confirmation of species from Matt L. in Alb. NM.  We confirmed his pictures to Centruroides sculpturatus (gertschi form) from Sierra County, New Mexico.    We compared the various characters between Centruroides sculpturatus and Centruroides vittatus.

Matt was gracious to allow his pictures on the blog.

Recently(09.26.10), Matt sent sent some comparison photos of the sexes and species. Can you guess which species is which? Comments are welcome.

 

Description of site:  Provides a scorpion species list, desert biology, zoogeography, systematics, publications, habitat photos and specimen images.

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