Genetic diversity of medically important scorpions of the genus Centruroides from Panama

 

Panama is one of the countries in Central America with the highest incidens of sting cases, mainly caused by several species in the genus Centruroides Marx, 1890 (Buthidae). Identifying medical important species is important, but can be difficult because of their similarities in morphology and habitus (but at the same time high intraspecific variaton in some of the species). Samuel Escudera-Sanjur and co-workers have recently published a study of the genetic diversity data from four species of Centruroides from Panama.

Abstract:
With more than 33,000 sting cases and 47 deaths recorded between 2000 and 2016, Panama is the country with the highest incidence of envenomations by scorpions in Central America. Species in the genus Centruroides are responsible for most scorpion sting reports, however, identification at the species level is complicated because the genus has considerable intraspecific morphological variation. To date no molecular data have been reported from Panama that would help to estimate their genetic diversity and validate morphometric identification methods. We provide here the first genetic diversity data of the two endemic species (C. granosus and C. panamensis) and other two species reported in Panama (C. bicolor and C. limbatus). A total of 41 specimens were sequenced for COI and 16S rDNA mitochondrial genes. The phylogenetic concatenated analysis separates the Panamanian samples into four well-supported clades represented by C. bicolor, C. granosus and (C. panamensis ? C. limbatus). The two endemic species are not the closest relatives in the tree. Low diversity in combination with its very narrow distribution suggest that C. panamensis is susceptible to environmental degradation. A single specimen of Coiba island is intermediate in the tree structure between C. bicolor and C. panamensis and may represent an early stage of speciation. The haplotype network is also consistent with the phylogenetic trees.

Reference:
Escudero-Sanjur S, Castro-Perez E, De Patino HA, Rastogi I, Ramos CW. Genetic diversity of medically important scorpions of the genus Centruroides (Buthidae) from Panama including two endemic species. Journal of genetics. 2022;101. [Subscription required for full text]

Family Buthidae

Two new species of Paruroctonus from a special habitat type in California, USA

 

Prakrit Jain and co-workers have recently described two new species of Paruroctonus Werner, 1934 (Vaejovidae) from California, USA.

Paruroctonus conclusus Jain, Forbes & Esposito, 2022

Paruroctonus soda Jain, Forbes & Esposito, 2022

The two new species have a limited distribution and seem to be limited to a alkali-sink habitat surrounding desert playas. The special habitats are described and the species' future is discussed.

Abstract:
Herein we describe two new species of Paruroctonus (Werner 1934) from California: Paruroctonus soda sp. nov. from the Soda Lake playa at the center of the Carrizo Plain in San Luis Obispo county and Paruroctonus conclusus sp. nov. from the Koehn Lake playa in the Mojave Desert of Kern County. They can be differentiated from other Paruroctonus by a combination of morphological features including deeply scalloped pedipalp fingers in males, specific patterns of fuscous pigmentation, unique setal counts, and unique morphometric ratios. They can also be separated from one another by the latter three characters. Photographs of a large selection of live scorpions are provided, including detailed images and figures of many morphological features. Their distributions, habitats, and ecologies are discussed; and important steps towards their conservation are described.

Reference:
Jain P, Forbes H, Esposito LA. Two new alkali-sink specialist species of Paruroctonus Werner 1934 (Scorpiones, Vaejovidae) from central California. ZooKeys. 2022;1117. [Open Access]

Thanks to Matt Simon and Gerard Dupre for informing me about this article!

Family Vaejovidae

A new species of Androctonus from Libya

 

Wilson Lourenco and Hisham El-Hennawy have recently described a new species of Androctonus Ehrenberg, 1828 (Buthidae) from the Tibesti Massif in Libya.

Androctonus tibesti Lourenco & El-Hennaway, 2022

The biogeography of the region is also discussed.

Abstract:
A further new species of scorpion belonging to the genus Androctonus Ehrenberg, 1828 (Family Buthidae C.L. Koch, 1837), is described on the basis of one male specimen collected in the NE range of the Tibesti Mountains in Libya. This is the first record of the genus Androctonus for the Tibesti Massif and the new species most certainly corresponds to an endemic element to this mountain range. As in previous studied cases, these Saharan Massifs prove to be very important endemic centres within the Sahara desert.

Reference:
Lourenco WR, El-Hennawy HK. A new species of Androctonus Ehrenberg, 1828 from the North East portion of the Tibesti Massif in Libya (Scorpiones: Buthidae). Serket. 2022;18(4):428-40. [Open Access]

Thanks to Hisham El-Hennawy for informing me about their article!

Family Buthidae

A new species of Leiurus from Iraq

 

Wilson Lourenco has recently published a description of a new species of Leiurus Ehrenberg, 1828 (Buthidae) from the Al-Anbâr Province in Iraq.

Leiurus maculatus Lourenco, 2022.

A new subgenus is also created to accomodate the new species that has characteristics both from Leiurus and Buthus Leach, 1815.

Iraquioleiurus Lourenco, 2022

Abstract:
A new species of buthid scorpion belonging to the genus Leiurus Ehrenberg is described based on one female collected in the Al-Anbâr Province in Iraq. Since the early 2000s, the genus Leiurus Ehrenberg, 1828 (family Buthidae) started to be the subject of several new studies. Some of the populations previously considered as subspecies were raised to the rank of species, but also many new species have been described. Nevertheless, although the important number of modifications brought to the composition of the genus Leiurus, no attempt was done to divide it in sub generic units. The study of an atypical new species of Leiurus from Iraq, suggests the creation of a new subgenus to accommodate it. Further investigations should bring more precise conclusions about the status of this particular population. The type locality of the new species represents the first confirmed record of the genus Leiurus for Iraq.

Reference:
Lourenco WR. A new subgenus and species of Leiurus Ehrenberg, 1828 from Iraq (Scorpiones: Buthidae). Serket.18(4):421-7. [Open Access]

Thanks to Hisham El-Hennawy for informing me about this article!

Family Buthidae

An update on the infamous, medical important buthid Tityus serrulatus from Brazil

 

Among the most dangerous scorpions in the word, the genus Tityus C. L. Koch, 1836 (Buthidae) from South America has some of the most potent species. Bad guy number one in the genus is probably the Brazilian species Tityus serrulatus Lutz & Mello, 1922. The species is well known for its medical potency, but also for its rapid geographical expansion, occurrence in urban habitats and for its large populations of asexual (parthenogentic) members.

Wilson Lourenco has recently published an update on the historical, geographical and ecological aspects connected to this important species. The article also discuss the status of other species in the genus.

Abstract:
A synopsis on the historical, geographical and ecological aspects related to the most conspicuous scorpion species of the genus Tityus known from Brazil is proposed. Tityus serrulatus Lutz & Mello, 1922 was described precisely one century ago, nevertheless many questions related to its ecological adaptations and geographical expansion remain without a precise response. This species, well known for its infamous reputation of noxious species, is also known for its capacity to reproduce asexually, by parthenogenesis. Although the individuals of a given population are considered clones, a new hypothesis could  suggest the occurrence of mutations within isolated individuals, leading to distinct subpopulations that could present better phenotypic performances in ecological habitats distinct from those of the original area of distribution of the species.

Reference:
Lourenço WR. Back to Tityus serrulatus Lutz & Mello, 1922 (Scorpiones: Buthidae): new comments about an old species. J Venom Anim Toxins Incl Trop Dis. 2022;28:e20220016. [Open Access]

Family Buthidae

An update on the scorpion fauna of Djibouti

 

Frantisek Kovarik and Graeme Lowe have published a new paper from their ongoing studies of the scorpions of the Horn of Africa. In the recent study they focus on scorpions from Djibouti based on new materials. All known species are listed with information and pictures and the following taxonomical decisions have been made:

New species:

Hemiscorpius lipsae Kovarik & Lowe, 2022 (family Hemiscorpiidae) 

Synonymizations:

Orthochirus borrii Rossi, 2017 (Buthidae) is synonymized with O. afar Kovařík & Lowe, 2016. NB! O. borriiwas never registered in The Scorpion Files.

Orthochirus aristidis (Simon, 1882) (Buthidae) is returned to synonymy with O. olivaceus Karsch, 1881.

Orthochirus arenicola Lourenço & Ythier, 2021 (Buthidae) is considered nomen dubium.

The article also has a revision of the diagnosis of Orthochirus afar Kovařík & Lowe, 2016 (Buthidae).

Abstract:
All scorpion species known from Djibouti are listed, with color photographs and maps of their distribution. Buthus awashensis Kovařík, 2011 known from Ethiopia and Somaliland is reported for the first time from Djibouti. The diagnosis of Orthochirus afar Kovařík & Lowe, 2016 is revised; O. borrii Rossi, 2017 is determined to be a junior synonym of O. afar Kovařík & Lowe, 2016 syn. n.; O. aristidis (Simon, 1882) syn. res. is returned to synonymy with O. olivaceus Karsch, 1881; and O. arenicola Lourenço & Ythier, 2021, is relegated to the status of nomen dubium. Hemiscorpius lipsae sp. n. is described and fully complemented with color photos of the female holotype and its habitat.

Reference:
Kovarik F, Lowe G. Scorpions of the Horn of Africa (Arachnida, Scorpiones). Part XXVIII. Scorpions of Djibouti. Euscorpius. 2022(357):1-31.

Family Buthidae

Family Hemiscoriidae