A new species of Tityopsis from Cuba

 

The 400th issue of  the open access journal “Euscorpius” is dedicated to the memory of the Cuban scorpion expert and friend to many of us in the scorpion community, Rolando Teruel, who we lost way too early in 2023. 

In the current issue, Frantisek Kovarik and co-workers describe a new species of Tityopsis Armas, 1974 (Buthidae) from Cuba. The new species was collected by Rolando, but he died before he could describe it. The new species is named in his honor.

Tityopsis rolandoi Kovarik, Stockmann, Stahlavsky & Yong, 2024

Abstract:
A new species Tityopsis rolandoi sp. n. is described from Cuba, fully illustrated with color photos showing its morphology and habitus. T. rolandoi sp. n. is the only species of the genus with a combination of two characters: movable finger shorter than carapace and chela length/width ratio 3.6 in male. This species also has a characteristic shape of a median smooth patch of sternite V, which is almost oval in male. In addition to morphology, we present the information about the karyotype of T. rolandoi sp. n. (2n=20) and T. sheylae (2n=22).

Reference:
Kovarik F, Stockmann M, Stahlavsky F, Yong S. Tityopsis rolandoi sp. n. (Scorpiones: Buthidae) from Cuba. Euscorpius. 2024(400):1-15. [Open Access]

Family Buthidae

Shelter size and scent are factors that have an impact on shelter selection in females of two scorpion species

 

Shelter selection and shelters are important for the survival of most scorpions. Some scorpion dig their own burrow, others use naturally existing ones like cracks and crevices in rocks and stones, depressions under stones and burrows made by other animals.

Janina Hladik and co-workers have recently published a study investigation shelter selection (with focus on shelter size and scent) in females of Euscorpius italicus (Herbst, 1800) (Euscorpiidae) and Mesobuthus gibbosus (C.L. Koch, 1839) (Buthidae).

Females of both E. italicus and M. eupeus favor larger over smaller shelters, while they do not show clear preferences for conspecific scents. An impairment experiment showed that the scorpions could not detect size nor scent properly when either their pectines or pedipalps were impaired.

Abstract:
Shelter selection is an important task in an animal’s life. Concerning scorpions, little is known on the evaluation of potential shelters and the importance of chemosensation. To address these issues, we conducted a two-choice shelter test in rectangular open field arenas to identify properties rendering shelters attractive for female scorpions of the species E. italicus and M.  prey, aversive: rosemary oil). Contact with the shelters was video-recorded under red light for 13 h, including the whole night phase. Results revealed a preference for larger shelters, with conspecific scent having minor or no influence. Striking differences occurred with regard to prey and rosemary oil scents. Prey scent was more attractive to M. eupeus, while rosemary oil did not act as a repellent. E. italicus was not very attracted by prey scent, but was repelled by rosemary oil. These findings might reflect the different habitats, semi-arid vs. Mediterranean climates: prey and rosemary are scarce in the semi-arid climate (habitat of M. eupeus), whereas they are abundant in the Mediterranean climate (habitat of E. italicus). We carried out impairment experiments to identify the main sensory organs responsible for the above observations. These are the pectines and pedipalps which function as mechano- and chemosensors. Scorpions could not detect size nor scent properly when either their pectines or pedipalps were impaired.

Reference:
Hladik J, Bailer Y, Wolf H, Stemme T. Shelter selection in females of two scorpion species depends on shelter size and scent. J Comp Physiol A Neuroethol Sens Neural Behav Physiol. 2024. [Open Access]

An updated list of the scorpions of French Guiana

 

Eric Ythier and Gerard Dupre recently published an article listing up all species reported from French Guiana.

Abstract:
La faune des scorpions de la Guyane française est en constante évolution faunistique depuis les années 2000. Nous présentons une synthèse actuelle de cette région d’une grande richesse spécifique avec un taux d’endémicité important.

Reference:
Ythier E, Dupre G. Les scorpions de la Guyane Francaise (Aarachnida : Scorpiones). Arachnides. 2024(118):1-8. [Open Access]

Thanks to Gerard for sharing the online archive of Arachnides with The Scorpion Files.

A new species of Hadrurochactas French Guiana

 

Eric Ythier and Wilson Lourenco recently published a description of a new species of Hadrurochactas Pocock, 1893(Chactidae) from the Mitaraka Massif in French Guiana.

Hadrurochactas tumucumaque Ythier & Lourenço, 2024

Abstract:
A new species belonging to the genus Hadrurochactas Pocock, 1893 (family Chactidae Pocock, 1893) is described on the basis of one male specimen collected in southern French Guiana, in the Mitaraka Massif, belonging to the Tumuk Humak Mountains (Serra do Tumucumaque), close to the border between French Guiana and Brazil. Hadrurochactas tumucumaque sp. n. represents the third species of Hadrurochactas reported from French Guiana and the total number of Hadrurochactas species is now raised to nine. The disrupted pattern of distribution of the genus is also discussed.

References:
Ythier E, Lourenco WR. A new species of Hadrurochactas Pocock, 1893 (Scorpiones: Chactidae) from the Mitaraka Massif in French Guiana. Faunitaxys. 2024;12(59):1-9. [Open Access]

Family Chactidae

Updated records of scorpion stowaways discovered in United Kingdom

 

In 2023, Daniella Sherwood and Luis de Armas published an article presenting old and new records of scorpions detected as stowaways in the United Kingdom. In a recent article, Daniella Sherwood and co-workers present updated information on scorpion stowaways discovered in the UK.

Abstract:
No abstract.

Reference:
Sherwood D, De Armas L, Tchilinguirian J. Additions to the list of scorpions (Arachnida: Scorpiones) intercepted as stowaways in the United Kingdom. Newsletter of the British Arachnological Society. 2024(161):3-5. [Access supplied by authors]

Thanks to Daniella for sending me link to the article!

A new species of Isometrus from India

 

Mahesh Bangar and co-workers have recently described a new species of Isometrus Ehrenberg, 1828 (Buthidae) from The Deccan Plateau in India.

Isometrus dnyandeoi Bandgar, Kininge, Bhosale, Bandgar & Bhosale, 2024

Abstract:
We described a new species of the scorpion genus Isometrus Ehrenberg, 1828 based on six specimens near Kolhapur, Maharashtra, India. Isometrus dnyandeo sp. nov. represent the eighteenth described species, and the first new species described from the agricultural land outside of Ghat region. Genetically I. dnyandeo sp. nov. is distinct from I. amboli with a genetic divergence of 8.6% (COI) and shows a high divergence with I. palani (16.2%).

Reference:
Bandgar M, Kininge S, Bhosale A, Bandgar K, Bhosale D, Suryavanshi A, et al. A new species of Isometrus Ehrenberg, 1828 (Scorpiones: Buthidae) from the Maharashtra, India. Journal of the Bombay Natural History Society. 2024;121(3). [Subscription required for full text]

Thanks to Gerard Dupre for sending me this article!

Family Buthidae