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Comptes Rendus

Taxonomy/Taxinomie
A new species of scorpion of the genus Neoscorpiops Vachon, 1980 (Scorpiones: Euscorpiidae) from India
Comptes Rendus. Biologies, Volume 337 (2014) no. 2, pp. 143-149.

Résumé

A new species of scorpion of the genus Neoscorpiops Vachon, 1980 is described from Northern Maharashtra. Neoscorpiops maharashtraensis sp. nov. is a medium-sized scorpion species ranging from 36 to 42 mm. Carapace, mesosoma and metasoma brown, legs and telson yellow; pedipalp in a shade of brown with carinae dark drown to black. Granulation on carapace coarse, with a few smooth patches; on mesosoma, which is restricted to the posterior half. Anterior margin of carapace with a moderately deep “U”-shaped emargination medially lacking elevated edges. Pectines well developed 7/7. Trichobothria on patella ventral 13–16. Pedipalp chela narrow and elongate in males, length-to-width ratio in males is 4.86–5.05.

Métadonnées
Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crvi.2013.11.012
Mots clés : Scorpion, India, New species, Neoscorpiops, Maharashtra

Zeeshan Ayaz Mirza 1 ; Rajesh V. Sanap 2 ; Raman Upadhye 3

1 Post-Graduate Program in Wildlife Biology & Conservation, Wildlife Conservation Society-India Program, National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore 560065, India
2 Post-Graduate Program in Ecology and Environment, Indian Institute of Ecology and Environment, A 15, Paryavaran Complex, South of Saket, New Delhi 110030, India
3 Pokharkar house, Near Town Hall, Old Jalna, Jalna 431203, India
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     title = {A new species of scorpion of the genus {\protect\emph{Neoscorpiops}} {Vachon,} 1980 {(Scorpiones:} {Euscorpiidae)} from {India}},
     journal = {Comptes Rendus. Biologies},
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Zeeshan Ayaz Mirza; Rajesh V. Sanap; Raman Upadhye. A new species of scorpion of the genus Neoscorpiops Vachon, 1980 (Scorpiones: Euscorpiidae) from India. Comptes Rendus. Biologies, Volume 337 (2014) no. 2, pp. 143-149. doi : 10.1016/j.crvi.2013.11.012. https://comptes-rendus.academie-sciences.fr/biologies/articles/10.1016/j.crvi.2013.11.012/

Version originale du texte intégral

1 Introduction

The scorpion family Euscorpiidae comprises 10 genera and 99 species, of which three genera are reported to occur in India [1]. In India, the three genera, Euscorpiops Vachon, 1980, Scorpiops Peters, 1862 and Neoscorpiops Vachon, 1980 show an interesting pattern of distribution. Euscorpiops and Scorpiops are distributed in the Himalayas and North East India, with the exception of a single species of the latter genus described from Central India. Neoscorpiops, on the other hand, is distributed in the Northern Western Ghats of Maharashtra and Gujarat. The genus Neoscorpiops is most similar in the genus Scorpiops, but it differs, however, in possessing a higher number of trichobothria on the external aspect of patella [2]. Neoscorpiops is presently comprised of three species: N. deccanensis Tikader and Bastawade 1983, N. tenuicauda Pocock 1894 and N. sataraensis Pocock 1900 [3,4]. These three species have been reported from dry deciduous, moist deciduous and semi-evergreen forest of Northern Western Ghats and are abundant above an altitude of 800 m [5]. Bastawade [5] carried out an extensive study on these three species and reported variations in trichobothria placement in the three taxa, but he did not, however, comment on the taxonomic status of the species. The study conducted by Bastawade [5] raises doubts on the validity of N. deccanensis, given that the species was described on the basis of differences in trichobothria [4].

During recent arachnological expeditions conducted as part of an ongoing study on documentation of scorpions of India, specimens of a Neoscorpiops were collected that differ from known species of the genus after detailed comparison with museum material housed in the collection of the Natural History Museum, London, and the Bombay Natural History Society, Mumbai. These specimens were collected from outside the Western Ghats, to which this genus was thought to be restricted until now [5]. Based on five specimens collected from two localities neighboring Gautala Wildlife Sanctuary, we here describe a new species of the rock-dwelling scorpion of the genus Neoscorpiops.

2 Methods

Specimens were collected and preserved in 70% ethanol and have been deposited in the collection of the Bombay Natural History Society (BNHS, Mumbai). Measurements were taken with a Mitutoyo™ digital calliper with an error of 0.1 and morphological details were recorded using an Olympus™ SZ40. Measurements were taken following Stahnke [6] and are provided in millimetres (mm). Trichobothrial nomenclature follows Vachon [7] and morphological terminologies follow Hjelle [8]. The hemispermataphore was dissected using teasing needles and was cleaned in clove oil. Diagrams were traced with a Rotring pen. Acronyms used in the manuscript are as follows: BNHS, Bombay Natural History Society, Mumbai; NHM, Natural History Museum, London.

3 Taxonomic treatment

Family: EUSCORPIIDAE Laurie, 1896

Genus: Neoscorpiops Vachon, 1980

Neoscorpiops maharashtraensis sp. nov.

Figs. 1–6

Fig. 1

(Colour online) Neoscorpiops maharashtraensis sp. nov. (BNHS Sc-62) holotype male in life. Photograph by Raman Upadhye.

Fig. 2

(Colour online) Neoscorpiops maharashtraensis sp. nov. (a) holotype male BNHS Sc-62 dorsal view, (b) holotype male BNHS Sc-62 ventral view, (c) female paratype BNHS Sc-63 dorsal aspect, (d) female paratype BNHS Sc-63 ventral view.

Fig. 3

Neoscorpiops maharashtraensis sp. nov. (BNHS Sc-62) holotype male pedipalp trichobothrial pattern, (a) manus dorsal view, (b) manus external view (c) manus ventral view, (d) patella dorsal view, (e) patella external view (f) patella ventral view.

Fig. 4

Neoscorpiops maharashtraensis sp. nov. (BNHS Sc-62) holotype male (a) ventral aspect of coxapophysis, sternum, genital operculum, pectines, (b) telson, metasomal segment IV and V, lateral view.

Fig. 5

(Colour online) Neoscorpiops maharashtraensis sp. nov. (BNHS Sc-62) holotype male hemispermataphore lateral view (a and b).

Fig. 6

(Colour online) Neoscorpiops maharashtraensis sp. nov. (BNHS Sc-66) paratype female in life. Photograph by Rajesh Sanap.

Holotype: adult male (BNHS Sc-62), “Shidi Ghat” near Wadali Village, Tehsil-Sillod, Aurangabad District, Maharashtra, India (20.532180°, 75.87962°, elevation 586 m). Collected by Raman Upadhye, Durgesh Pangarkar & Rushikesh Chippavar on 28 July 2013.

Paratypes: two females (BNHS Sc-63, BNHS Sc-64) same data as holotype; one male BNHS Sc-65 and one female BNHS Sc-66 from near Ghodegaon, Chalisgaon taluka, Jalgaon District, Maharashtra (20.312799°, 74.862241°, elevation 460 m), collected by Rajesh Sanap & Vishwanath Rathod on 1 August 2013.

Etymology: the new species is named after the Indian state of Maharashtra where the types were collected.

3.1 Diagnosis

A medium-sized scorpion ranging from 36–42 mm, Carapace, mesosoma and metasoma brown, legs and telson yellow; pedipalp in a shade of brown with carinae dark drown to black. Granulation on carapace coarse, with a few smooth patches; on mesosoma restricted to the posterior half. Anterior margin of carapace with a moderately deep “U”-shaped emargination medially lacking elevated edges. Pectines well developed 7/7. Trichobothria on ventral aspect of patella 13–16 in number. Pedipalp chela narrow and elongate in males, length-to-width ratio in males from 4.86 to 5.05.

Relationship:Neoscorpiops maharashtraensissp. nov. can be distinguished from its congers in bearing the following set of characters:

  • (i) carapace, mesosoma and metasoma brown, legs and telson yellow; pedipalp in a shade of brown with carinae dark drown to black (versus overall back with only extremities of leg in a shade of brown in N. deccanensis and N. tenuicauda);
  • (ii) pedipalp manus length-to-width ratio in males is 4.86–5.05 (versus 3.07 in N. sataraensis and 3.30 in N. tenuicauda);
  • (iii) telson bulbous gradually tapering towards aculeus lacking constriction at aculear base (distinctly marked constriction at the base of aculeus in N. sataraensis);
  • (iv) internal aspect of patella with one large and a small adjacent tubercle (a single large tubercle on internal aspect of patella in N. sataraensis, N. tenuicauda and N. deccanensis);
  • (v) anterior margin of carapace with a moderately deep “U”-shaped emargination medially lacking elevated edges (anterior margin of carapace with a deep “U”-shaped emargination medially with elevated edges N. sataraensis, N. tenuicauda and N. deccanensis);
  • (vi) dorsolateral carinae on segment II–IV terminate in a short spine (dorsolateral carinae on segment II–IV terminate in a distinctly long, thorn-like spine in N. sataraensis, N. tenuicauda and N. deccanensis).

3.2 Description of holotype male BNHS Sc-62

Morphometric measurements in Table 1.

Table 1

Morphometric details of the type series of Neoscorpiops maharashtraensis sp. nov.

Characters Holotype
BNHS Sc-62
Paratype
BNHS Sc-63
Paratype
BNHS Sc-64
Paratype
BNHS Sc-65
Paratype
BNHS Sc-66
Sex Male Female Female Male Female
Total length 42.49 41.22 36.68 34.05 36.56
Carapace
 Length 8.17 6.67 6.46 6.71 7.37
 Anterior width 5.86 3.81 3.48 4.67 4.76
 Posterior width 7.92 6.02 5.7 6.34 7.35
 Mesosoma length 16.14 21.53 18.06 13.21 15.79
Metasona I
 Length 2.84 2.01 1.43 1.95 1.67
 Width 2.2 1.47 1.51 2.2 1.8
Metasona II
 Length 2.91 1.93 1.66 1.95 2.05
 Width 2.07 1.41 1.49 2.01 1.46
Metasona III
 Length 3.03 2.1 1.9 2.09 2.45
 Width 1.98 1.4 1.21 1.92 1.8
Metasona IV
 Length 3.74 2.75 2.7 2.99 2.72
 Width 1.78 1.38 1.29 1.73 1.62
Metasona V
 Length 5.66 4.23 4.47 5.15 4.51
 Width 1.78 1.18 1.25 1.52 1.2
 Depth 1.17 0.85 1.21 1.49 1.52
 Telson length 6.18 3.82 4.44 6.9 5.5
 Width 2.1 1.38 1.43 1.95 1.55
 Femur length 11.02 6.75 6.46 8.82 7.45
 Width 3.12 2.44 2.13 2.8 2.97
 Patella length 9.39 5.96 6.05 8.32 6.49
 Width 3.74 2.95 2.54 2.77 3.22
 Manus length 19.09 11.81 11.36 17.39 14.3
 Width 3.78 3.49 3.19 3.58 4.09
 Depth 2.42 2.29 2.2 2.41 2.95
 Movable finger length 7.92 6.32 5.75 7.12 6.59
 Pectines 7/7 6/6 7/7 7/7 8/7
 Trichobothria on ventral aspect of patella 16 15/13 15 16/16 17/17

Colouration: (Figs. 1, 2 and 6, in life) overall in a shade of brown or tan, legs in a lighter shade of brown. Telson creamish yellow. Carinae on pedipalp segments and fingers of manus dark brown to black. Ocular region (median as well as lateral) black. Metasonal segment V paler than the preceding segments. Colouration more faded and paler in preservative. Legs and telson almost yellow. Chelicerae in the shade of tan with dark brown reticulation throughout.

Prosoma: carapace anterior margin with a moderately deep “U”-shaped emargination medially. Carapacial carinae absent; coarsely granular throughout with a few smooth patches. Three pairs of lateral eyes; anterior lateral eye placed well in advance of the median and posterior lateral eyes.

Mesosoma: mesosomal tergites I–VI with an obsolete median carinae and with two lateral smooth pits in the anterior portion; anterior half of tergites I–VI smooth, lacking granulation, posterior half coarsely granular. Tergite VII granular throughout, with two pairs of granular lateral carinae and lacking median carinae. Intercarinal spaces on tergite VII coarsely granular. Sternites III–VI lacking granulation, but not smooth and glossy; sternite VII granular throughout. Pectines well developed, 7/7 in number without fulcra (Fig. 4).

Metasoma: metasomal segment I bearing 10 carinae (paired ventral, ventrolateral, intermedian, dorsolateral and dorsal carinae), II–IV with eight carinae lacking intermedian carinae; segment V with five carinae (single ventral, paired ventrolateral and paired dorsolateral carinae). Dorsolateral carinae on segment II–IV terminating in a short spine. All carinae poorly developed; dorsal furrow on each metasomal segment well developed, shallow on segment V. Long setae sparsely arranged on each metasonal segment. Telson smooth, at least 6.5 times as the aculeus and lacks carinae (Fig. 4). Cheliceral dentition characteristic of sub-family. Pedipalp femur and patella pentacarinate, all carinae granular. Pedipalp patella with two large and a few small spinoid protrusions on the internal aspect. Trichobothrial pattern C, neobothriotaxic (Fig. 3) [7]; patella with 24 external trichobothria and 16 ventral trichobothria. Movable finger of manus with two rows of granules with 12 large granules including the terminal one on the outer row. Leg tarsi I–II with five spinules on its ventral aspect, III–IV with seven spinules on its ventral aspect, these between two thorn-like spurs. Pro- and retro-lateral pedal spurs well developed.

Hemispermataphore: lamelliform; pedicel 1.2 long and 0.3 wide. Trunk 1.4 long and 0.6 at its widest distal end. Capsule well developed with a single hook-like sperm duct; lamina 4 mm long and 0.1 mm wide at base curled at distal end (Fig. 5).

Variation: apart from morphometric values and trichobothria on ventral aspect of patella, the type series differ from the holotype in the following aspects, especially the female specimens: (i) distinctly darker in colouration and (ii) markedly short and stout pedipalp segments.

Natural history notes: the types were collected from under boulders along streams during the monsoon season from two localities Shidi Ghat located east of Gautala Wildlife Sanctuary and Ghodegaon to the west of Gautala Wildlife Sanctuary spread over the Satmal Hill range (Fig. 7). The forest of the type locality is of tropical dry deciduous and is contagious with Gautala Wildlife Sanctuary (Fig. 8). Based on the collection localities, it is likely that this species is distributed in three districts of the Maharashtra State: Aurangabad, Jalgaon, and Nashik. These scorpions are really fast and sting at the slightest provocation unlike their congers. A few specimens were found in rock crevices as typical of members of this genus. Local residents at the collection site of the holotype mentioned that the species is frequently seen during monsoons and rarely during the dry months of the year. The presence of the genus Neoscorpiops outside of Western Ghats further provides hints of the presence of this genus or perhaps in the adjoining hill ranges, like Satpura and Ajanta hill ranges.

Fig. 7

(Colour online) Map showing type locality of Neoscorpiops maharashtraensis sp. nov., blue circle represents “Shidi Ghat” in Aurangabad district and yellow circle represents Ghodegaon in Jalgaon district in the Indian state of Maharashtra.

Fig. 8

(Colour online.) Type locality “Shidi Ghat” of Neoscorpiops maharashtraensis sp. nov. Photograph by Raman Upadhye.

4 Discussion

The genus Neoscorpiops was described as a sub-genus of Scorpiops, and later Lourenço [9] raised the sub-family Scorpiopsinae to family level Scorpiopidae, and also raised Neoscorpiops to the generic level. Soleglad and Sissom [10] downgraded it to a sub-family level and placed Scorpiopidae in the synonymy of Euscorpiidae. With the present description of N. maharashtraensis sp. nov., members of the genus Neoscorpiops appear to be distributed in high altitude areas (> 180 m), irrespective of the forest type and precipitation. Based on this, we presume that the genus is likely to be more widespread and may also occur in the Satpura hills in addition to Western Ghats and Satmal hills. The presence of Neoscorpiops in Satpura hills will be of great interest, as this would put forth the argument of the Satpura hills serving as a past gateway for Himalayan biota to migrate to the Western Ghats. Several species of birds and butterflies are distributed only in the Himalayas, Satpura, and the Western Ghats, which further supported the gateway hypothesis. In a similar manner, Euscorpiops and Scorpiops are distributed in the Himalayas and North East India with a single species in Satpura hills of the latter genus; however, genus Neoscorpiops is present in the Western Ghats and possibly Satpura hills. These are however assumptions and a detailed study with the help of molecular markers across relevant taxa will help shed light on this argument.

Disclosure of interest

The authors have not supplied their declaration of conflict of interest.

Acknowledgments

ZM & RS were able to visit the Natural History Museum, London through a travel grant from the Newby Trust Limited to ZM. Rahul Khot (BNHS) kindly helped with registration number for the type. For logistic support, we acknowledge The Gerry Martin Project. The following people are thanked for help: for lab facilities Krushnamegh Kunte (NCBS), K.S. Krishnan (NCBS) and for permission to examine comparative material Janet Beccaloni (NHM, London). RS & RU wish to thank Vishwanath Rathode, Durgesh Pangarkar & Rushikesh Chippavar for warm hospitality and assistance during fieldwork. RU acknowledges help from Laxmikant Shinde for their help for lab work, Kulbhushan Naik and Mangesh Dehedkar for their kind help during field work and study.


Bibliographie

[1] J.O. Rein The Scorpion Files. Trondheim: Norwegian University of Science and Technology, 2013 (Available at http://www.ntnu.no/ub/scorpion-files/ accessed on 15/09/2013)

[2] F. Kovařík Revision of family Scorpiopidae (Scorpiones), with descriptions of six new species, Acta Soc. Zool. Bohem., Volume 64 (2000), pp. 153-201

[3] R.I. Pocock Arachnida. The fauna of British India, including Ceylon and Burma, Published under the authority of the Secretary of State for India in Council, London, 1900 (279 p)

[4] B.K. Tikader; D.B. Bastawade (Scorpions (Scorpionida: Arachnida)), Volume vol. 3, Zoological Survey of India, Calcutta (1983), p. 671

[5] D.B. Bastawade Distribution of Neoscorpiops scorpions of the Western Ghats of Maharashtra and Gujarat and possible trichobothrial variations among isolated populations, J. Bombay Nat. Hist. Soc., Volume 94 (1997), pp. 104-114

[6] H.L. Stahnke Scorpion nomenclature and mensuration, Entomol. News, Volume 81 (1970), pp. 297-316

[7] M. Vachon Étude des caractères utilisés pour classer les familles et les genres de Scorpions (Arachnides). 1. La trichobothriotaxie en arachnologie. Sigles trichobothriaux et types de trichobothriotaxie chez les Scorpions, Bull. Mus. Natl. Hist. Nat., Volume 140 (1974), pp. 857-958

[8] J.T. Hjelle Anatomy and morphology (G.A. Polis, ed.), The Biology of Scorpions, Stanford University Press, 1990, pp. 9-63

[9] W.R. Lourenço Designation of the scorpion sub-family Scorpiopsinae Kraepelin, 1905 as family Scorpiopsidae Kraepelin 1905 (stat. nov.): its generic composition and a description of a new species of Scorpiops from Pakistan (Scorpiones, Scorpiopsidae), Entomol. Mitt. Zool. Mus. Hamburg., Volume 12 (1998) no. 157, pp. 245-254

[10] M.E. Soleglad; W.D. Sissom Phylogeny of the family Euscorpiidae Laurie 1869 (Scorpiones): a major revision (V. Fet; P.A. Selden, eds.), Scorpions. In Memoriam Gary A. Polis, British Arachnological Society, Burnham Beeches, Bucks, UK, 2001, pp. 25-111 (XI+404 p)


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