Reddyanus ceylonensis Kovarik, Lowe, Ranawana, Hoferek, Jayarathne, Pliskova et Stahlavsky 2016, sp. n.
Creators: name: Kovařík, František
name: Lowe, Graeme
name: Ranawana, Kithsiri B.
name: Hoferek, David
name: Š, V. A.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Scorpiones
Buthidae
Reddyanus
Reddyanus ceylonensis

description: Reddyanus ceylonensis Kovařík, Lowe, Ranawana, Hoferek, Jayarathne, Plíšková et Šťáhlavský, sp. n.
(Figs. 14, 201–204, 213–214, 229–230, 247, 256, 303– 333, 413–414, 553, 567, Tables 3, 5)
http://www.zoobank.org/urn:lsid:zoobank.org:act: E E798511-D2D8-4D5A-9094-BE5551EC1CCB
TYPE LOCALITY AND TYPE REPOSITORY. Sri Lanka, Northern Province, Mannar District, Marichchukkaddi env, border of Wilpattu National Park, 08°33'32.3"N 079° 56'51"E, 7 m a.s.l., Locality 15CI; UPSL.
TYPE MATERIAL. Sri Lanka, Northern Province, Mannar District, Madhu Road, 08°48'26.3"N 080°10'26"E, 90 m a.s.l. (Locality 15 CH, Fig. 584), 24. –25.IV.2015, 1♀ (paratype, Fig. 331), FKCP, leg. Kovařík et al.; Northern Province, Mannar District, Marichchukkaddi env, border of Wilpattu National Park, 08°33'32.3"N 079°56'51"E, 7 m a.s.l. (Locality 15CI, Fig. 585), 25. –26.IV.2015, 1♂ (holotype, Figs. 201–204, 213, 229, 247, 256, 303–304, 307, 309, 311–315, 320–326, 413, 567) 3♂ (paratypes, Figs. 327–330, 333, 553) 3♀ (paratypes, Figs. 214, 230, 305–306, 308, 310, 316–319, 332, 414), 2juvs. (paratypes), FKCP, 1♂ 1♀ (paratypes), UPSL, leg. Kovařík et al.; North Central Province, Puttalam District, Eluwankulam, 08°12'35.1"N 079°51'32"E, 52 m a.s.l. (Locality 15CN, Fig. 591), 28.IV.2015, 2♀ 1juv.♂ (paratypes), FKCP, leg. Kovařík et al.; North Central Province, Puttalam District, Eluwankulam, 08°17'15"N 079°50'38.7"E, 38 m a.s.l. (Locality 15CO, Fig. 592), 28.IV.2015, 4♀ 4juvs, UPSL, leg. Kovařík et al.
ETYMOLOGY. Named after country of occurrence. Ceylon is the older name for Sri Lanka.
DIAGNOSIS. Total length 27–39 mm. Male has slightly longer metasomal segments and telson than female. Pedipalp segments approximately the same length in both sexes, pedipalp chela wider in male. Ratio of pedipalp chela length/ width 2.97–3.17 in male (Fig. 213, Tab. 5). Pedipalp movable finger shorter than manus of chela in male. Pedipalps and legs with brown maculation, identical on femur and patella. First metasomal segment with 10 carinae, second through fourth segments with eight carinae, fifth segment with five carinae in female and three to five in male. Terminal tubercle of each dorsal carina on metasomal segments of both sexes scarcely larger than preceding tubercles. Subaculear tooth wide and rounded, dorsally with granules in three rows, four symmetrical granules and one or two granules on tip. Ratio of metasomal segment II length/ width 1.85–1.97 in male. Glabrous zone along posterior margin of fifth sternite absent. Pectinal teeth number 11–15 in both sexes.
DESCRIPTION. Total length 27–39 mm. The habitus is shown in Figs. 313–306. For measurements and morphometric ratios see Tables 3 and 5. For position and distribution of trichobothria of pedipalps see Figs. 320–326. The male has slightly longer metasomal segments and telson (Figs. 331–318) and wider pedipalp chela than the female (Figs. 319–320).
Coloration (Figs. 303–306). Base color yellowish to reddish, with brown to black spots. Chelicera strongly reticulated, mainly anteriorly, with spotted fingers. Ventral surface of mesosoma and pedipalps yellowish brown with a pair of black spots on seventh sternite. Carapace and pedipalps dorsally and laterally yellowish to reddish, with brown to black spots, identical on femur, patella and manus of pedipalps. Pedipalp fingers reddish black. Legs with same color and pattern as pedipalp femur and patella. Metasomal segments yellowish to reddish with the spots. Older specimens have fourth and fifth metasomal segments reddish brown to black, both darker than the first to third segments. Telson reddish brown with spots but in older specimens could be black.
Mesosoma and carapace (Figs. 307–310). Carapace without carinae but with large granules. Mesosoma with one granulated median carina. Tergite VII pentacarinate. Seventh sternite with four incomplete carinae, sparsely granulate. The pectinal tooth count 11–15 in the females, 14–15 in the males. Pectines with three marginal lamellae, six or seven middle lamellae. Lamellae with numerous pale or reddish setae
Metasoma and telson (Figs. 213–214, 313–318, 413– 414). First metasomal segment with 10 carinae, second to the fourth segments with eight carinae, fifth segment with five carinae well developed in the female, only indicated or absent in the male. Ventral carina present on telson. Intercarinal surfaces of metasoma granulated, including dorsal surface mainly in the female. In both sexes, posterior terminal tubercle of each dorsal carina on metasomal segments is not enlarged but only very slightly larger on second and third segments. Telson elongate, with subaculear tooth wide and rounded, dorsally with granules in three rows, four symmetrical granules and one or two granules on the tip.
Pedipalps (Figs. 229–230, 319–326). Femur and patella only very sparsely hirsute, with complete carinae, granulated. Dorsal carinae indicated on the chela manus in female, absent in male. Sixth row of granules on movable finger with one external granule. Seventh row of granules on fixed finger without additional granules.
Legs (Figs. 201–204). Femur and patella with complete carinae, granulated. Legs hirsute, without bristle combs.
Hemispermatophore (Figs. 327–330). Trunk moderately narrow, elongate, more than twice as long as capsule region. Flagellum long, slender, laminiform, with broad hyaline fin along internal margin of cylindrical core, distally coiled. Median lobe narrow, distally truncate, with thin dorsal lamina near internal margin. Basal lobe greatly enlarged, a narrow, angular, pointed hook-like process arising dorsally, separated from base of median lobe.
VARIABILITY. Males of Sri Lankan Reddyanus species could be adults after the third to fifth ecdysis. Small males after the third ecdysis may not exhibit some diagnositic characters such as fully developed shape of chela or telson.
AFFINITIES. The described features distinguish R. ceylonensis sp. n. from all other species of the genus, and are recounted in the key. The morphologically closest species is R. besucheti, from which R. ceylonensis sp. n. differs mainly by the longer and narrower metasoma in males, and other measurements compared in Tab. 5. R. besucheti and R. ceylonensis sp. n. are the only two Sri Lankan Reddyanus species with the movable finger shorter than the manus of the pedipalp chela in the male, and with sexual dimorphism in the width of the chela.
description: Published as part of Kovařík, František, Lowe, Graeme, Ranawana, Kithsiri B., Hoferek, David & Š, V. A., 2016, Scorpions of Sri Lanka (Scorpiones Buthidae, Chaerilidae, Scorpionidae) with description of four new species of the genera Charmus Karsch, 1879 and Reddyanus Vachon, 1972, stat n, pp. 1-133 in Euscorpius 220 on pages 64-66, DOI: 10.18590/euscorpius.2016.vol2016.iss220.1, http://zenodo.org/record/7124466