Reddyanus Vachon 1972
Creators: name: Kovařík, František
name: Šťáhlavský, František
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Scorpiones
Buthidae
Reddyanus
Reddyanus majkusi
Reddyanus navaiae
Reddyanus neradi
Reddyanus petrzelkai
Reddyanus rolciki
Reddyanus schwotti
Reddyanus zideki

description: Reddyanus Vachon, 1972
(Figures 1–226, Tables 1–4)
Isometrus (Reddyanus) Vachon, 1972: 176–177, figs. 14, 16, 18, 20; Vachon, 1982: 90–101, 108–110, figs. 47–67, 88–91; Fet & Lowe, 2000: 150–154; KovařÍk, 2003: 5–14, figs. 1–8; KovařÍk & Ojanguren, 2013: 184–193, 347–354, 357–360, figs. 1265–1367, 1384–1409.
Isometrus (Raddyanus [sic]): Tikader & Bastawade, 1983: 254–311 (in part), figs. 727–770, 841–895.
Reddyanus KovařÍk et al., 2016: 53–88, figs. 14, 199, 201– 220, 225–236, 245–250, 254–402, 409–420, 551–554, 561–570, tables 3–5.
TYPE SPECIES. Isometrus acanthurus Pocock, 1899
DIAGNOSIS. Medium sized buthids, adults 19–75 mm. Sternum type 1, triangular in shape. Pedipalps orthobothriotaxic, type Aβ. Chelal trichobothrium db located between et and est. Three to five pairs of lateral eyes. Tibial spurs absent on all legs. Pedipalp movable finger with six rows of granules, several accessory granules and external and internal accessory granules. Pedipalp fixed finger with seven rows of granules and six external and seven internal accessory granules. Cheliceral fixed finger with a single ventral denticle. Third and fourth legs without tibial spurs. Tibia and tarsomeres of legs I–III with setae not arranged into bristle combs on dorsal surfaces. Tarsomere II of leg IV with two sparse rows of <20 spiniform setae on ventral surface. Mesosoma dorsally with one median carina. Telson with subaculear tooth pointed or rounded. Males of most species have longer metasomal segments and often also a wider pedipalp chela manus than females.
REMARKS ON KARYOTYPES. We analyzed male karyotypes of four new Reddyanus species. The choromosomes of these species (Figs. 215–220) show the typical features of the buthid scorpions such as holocentric organization, achiasmatic meiosis in males, and lower number of chromosomes (e. g. Mattos et al., 2013). The diploid sets of R. furai sp. n. holotype (2n=14) (Figs. 215, 221), R. majkusi sp. n. holotype (2n=16) (Figs. 216, 222), R. rolciki sp. n. holotype (2n=14) (Figs. 217, 223), and three R. schwotti paratypes (2n=11) (Figs. 218–220, 224) correspond to the known range for three Reddyanus species already analyzed from Sri Lanka (2n=15–17) (KovařÍk et al., 2016). The chromosomes of R. furai sp. n., R. majkusi sp. n., and R. rolciki sp. n. gradually decrease in length (Figs. 221–223), whereas the karyotype of R. schwotti possesses one extra large and one extra short chromosomes (Fig. 224, Table 4). Moreover, this species has odd number of chromosomes and very complex multivalent association (a chain of nine chromosomes) during meiosis (Fig. 219) in contrast to only observed bivalents in R. furai sp. n. (Fig. 215) and R. rolciki sp. n. (Fig. 217). The karyotype of R. schwotti probably has differentiated by the accumulation of chromosomal fusions and reciprocal translocations. The chromosomal rearrangements are frequently detected in many other buthid scorpions (e.g. Shanahan, 1989; SadÍlek et al., 2015; Mattos et al., 2018). These types of chromosomal rearrangements may also explain different numbers and lenghts of chromosomes in Reddyanus species from Sri Lanka (KovařÍk et al., 2016).
SUBORDINATE TAXA. Genus Reddyanus was revised by KovařÍk et Ojanguren (2013) as subgenus and elevated to the genus status by KovařÍk et al. (2016). Currently, it includes 32 species that can be divided into four informal groups according to their geographic distribution:
(a) species from India, Bangladesh and China (Tibet) (9 species): R. acanthurus (Pocock, 1899), R. assamensis (Oates, 1888), R. brachycentrus (Pocock, 1899), R. corbeti (Tikader & Bastawade, 1983), R. khammamensis (KovařÍk, 2003), R. problematicus (KovařÍk, 2003), R. rigidulus (Pocock, 1897), R. vittatus (Pocock, 1900), and R. tibetanus (Lourenco & Zhu, 2008);
(b) species from Sri Lanka (6 species): R. basilicus (Karsch, 1879), R. besucheti (Vachon, 1982), R. ceylonensis KovařÍk et al., 2016, R. jayarathnei KovařÍk et al., 2016, R. loebli (Vachon, 1982), and R. ranawanai KovařÍk et al., 2016);
(c) species from Australia, Melanesia, New Guinea, and Oceania (3 species): R. bilyi (KovařÍk, 2003), R. heimi (Vachon, 1976), and R. melanodactylus (L. Koch, 1867);
(d) species from Southeast Asia, which are revised here (14 species): R. deharvengi (Lourenco & Duhem, 2010), R. feti (KovařÍk, 2013), R. furai sp. n., R. hofereki sp. n., R. jendeki (KovařÍk, 2013), R. krasenskyi (KovařÍk, 1998), R. kurkai (KovařÍk, 1997), R. majkusi sp. n., R. navaiae (KovařÍk, 1998), R. neradi (KovařÍk, 2013), R. petrzelkai (KovařÍk, 2003), R. rolciki sp. n., R. schwotti sp. n., and R. zideki (KovařÍk, 1994).
COMMENTS. We did not include into this revision the species Isometrus (Reddyanus) hainanensis Lourenço et al., 2005 from China (Hainan Island) and I. (R.) lao Lourenço & Leguin, 2012 from Laos. I. (R.) hainanensis was based on two specimens collected in 1931. The authors stated (p. 58) that this species is closest to R. petrzelkai, from which it differs by pale coloration, and added that pigmentation can be very stable within populations of buthid species. I. (R.) lao was based on two specimens collected in 1938, and also in this case the authors argued that the difference is in “slightly darker coloration pattern” (than in I. hainanensis) and in other non-measurable characters (p. 74). The arguments about stability of pigmentation were refuted, and both species were synonymized with R. petrzelkai (see KovařÍk & Ojanguren, 2013: 191–192). However, based on new detailed study of genus Reddyanus and distributon of its species, we now believe that this synonymization was not valid. At the same time, it is still not possible to define unambiguously the identity of these two taxa due to their loss of pigmentation and important information missing in original descriptions. For a final decision, it is necessarily to study recently collected specimens of both populations in comparison with the types.
DISTRIBUTION. From India and China (Tibet) in the west to Melanesia in the east.
Table 2. Comparative measurements of adults of Reddyanus majkusi sp. n. and R. rolciki sp. n. Abbreviations: length (L), width (W, in carapace it corresponds to posterior width), depth (D).
Reddyanus majkusi sp. n.
(Figures 72–112, 197, 208, 225, Tables 2, 4)
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TYPE LOCALITY AND TYPE REPOSITORY. Malaysia, Pahang, Tioman Island, Juara, 2°80'N 104°19'E, 45 m a. s. l.; FKCP.
TYPE MATERIAL (FKCP). Malaysia, Pahang, Tioman Island, Juara, 2°80'N 104°19'E, 45 m a. s. l., 1♂ (holotype, No. 1559) 1♀ (paratype), 28.VIII.2018, leg. R. Majkus; Tioman Island, Tekek env. 2°49'14.7"N 104°10'16.1"E, 1♂ (paratype, Figs. 76–78), 21.X.2018, leg. A. Albert.
ETYMOLOGY. The species epithet is a patronym honoring Roman Majkus, the collector of types of the new species. He is also the author of the photographs of type locality (Figs. 111–112).
DIAGNOSIS. Adult from 29 mm (male) to 36 mm (female) long. Male has slightly longer metasomal segments and telson. Pedipalps, legs and metasoma I–III yellow, with brown spots. Femur of pedipalps mostly yellow, patella mostly black. Manus of pedipalps yellow with black spots, fingers reddish black. Metasoma V black and telson reddish black. First metasomal segment bears 10 carinae, second through fourth bear eight carinae, lateral carinae on metasoma II represented only by several granules mainly in posterior part. Metasoma V bears five. Terminal tubercle on second and third metasomal segments of both sexes slightly enlarged. Telson narrower in male. Subaculear tooth large but not rounded, dorsally with 5 granules in three rows. Pectinal teeth number 12–13 in male, 12 in female.
DESCRIPTION. The adults are 29–32.60 mm (males) – 36 mm (female) long. The habitus is shown in Figs. 72–77. For position and distribution of trichobothria of pedipalps see Figs. 93–96, and 98–99. Sexual dimorphism: adult male with slightly longer metasomal segments and narrower telson.
Coloration (Figs. 72–77, 109–110). The base color is yellow with dark spots. The chelicera is yellow, strongly reticulated. The fingers of chelicerae are spotted. The carapace and mesosoma are with a pattern that forms three dark longitudinal strips. The ventral side of the mesosoma is yellowish white with several spots on strnite VII. The femur and patella of pedipalps are yellow with dark spots, femur is mostly yellow and patella mostly black. The legs are also yellow with black spots. The metasoma I–III and partly metasoma IV are yellowish or redish brown with black spots, metasoma V is black and telson is reddish brown.
Carapace and mesosoma (Figs. 79–83). The entire carapace is covered with large granules; carinae are absent. The anterior margin of the carapace is medially convex. The mesosoma bears one median carina and is strongly granulated. Tergite VII is pentacarinate. The pectinal tooth count is 12–13 in males and 12 in female. The pectine marginal tips extend to the end of the third sternite in the males and to the half of the third sternite in the female. The pectines have three marginal lamellae and 5–7 middle lamellae. The lamellae and fulcra bear numerous light setae. Sternites are smooth with two parallel furrows except sternite VII which bears four incomplete carinae and is smooth. The glabrous zone in the middle of the posterior margin of sternite V present in male in shape of triangle and reduced in female.
Metasoma and telson (Figs. 84–85, 103–108). The first segment bears 10 carinae. The metasoma II–IV bear eight carinae, lateral carinae on metasoma II represented only by several granules in posterior part. The fifth segment bears five carinae from which the dorsal in male could be reduced. Ventral and ventrolateral carinae are present on the telson in male, and ventral and lateral, in female. Surfaces between carinae are obviously smooth, with small, sparse granules that become more numerous on metasoma I–IV mainly in female. Terminal tubercle on second and third metasomal segments of both sexes slightly enlarged. The telson narrower in male. Subaculear tooth large but not rounded, dorsally with 4–5 granules in three rows.
Pedipalps (Figs. 90–102). The pedipalps are very sparsely hirsute. The femur bears five granulated carinae and patella bears 7 smooth reduced carinae. The chela is with four carinae granulated in both sexes more in female. The chela is sparsely granulated in both sexes. The patella dorsally and femur are densely granulated in both sexes. Movable finger with six and fixed finger with seven rows of granules, both with several accessory granules and 6 external and 5–6 internal accessory granules.
Legs (Figs. 86–89). The legs without tibial spurs. The tibia and tarsomeres of legs with setae not arranged into bristle combs on dorsal surfaces. Tarsomere II of leg IV with two sparse rows of <20 spiniform setae on ventral surface. The femur bears 3–4, and patella, 5 carinae; both femur and patella are granulated.
Measurements. See Table 2.
AFFINITIES. The described features distinguish R. majkusi sp. n. from all other species of the genus. They are recounted in the key. Morphologically closest is R. zideki. Males of these two species has not extremely elongate metasomal segments (Figs. 192–202) but differs in color pattern of pedipalp patella (Fig. 197 verus 202). Subaculear tooth large but not rounded, dorsally with 3 granules in two rows in R. zideki (Fig. 214) versus 5 granules in three rows in R. majkusi sp. n. (Fig. 208).
DISTRIBUTION. Malaysia (Tioman Island) (Fig. 225).
Reddyanus navaiae (KovařÍk, 1998)
(Figure 225)
Isometrus (Reddyanus) navaiae KovařÍk, 1998a: 37; KovařÍk, 1998b: 112; Fet & Lowe, 2000: 153; KovařÍk, 2003: 10; KovařÍk in KovařÍk et Ojanguren, 2013: 190, figs. 1339– 1340.
TYPE LOCALITY AND TYPE REPOSITORY. Philippines, S. Mindanao, Port Banga; ZMHB.
TYPE MATERIAL. Philippines, S. Mindanao, Port Banga, V.1915, 4 ♀ (holotype and paratypes), leg. S. Böttcher & V. Heyne, ZMHB, NMPC, FKCP; N. Mindanao, Kolambugan, I. 1905, 1♀ 1juv. (paratypes), leg. S. Böttcher & V. Heyne, ZMHB; Luzon, Banahao, 2000 m a. s. l., 25.IV.1914, 1♀ (paratype), leg. S. Böttcher & V. Heyne, ZMHB.
DIAGNOSIS. Total length of females 19–34.4 mm, male unknown. Mesosoma bears two dark bands on dorsal margins. Median band indicated by dark spots at posterior margins of segments. Posterior margins of mesosomal segments and of carapace bear eight yellow spots or a yellow longitudinal band interrupted by dark transverse bands and spots. Pedipalps and legs reddish brown, with black spots. Base coloration identical on femur and patella. Metasoma dominantly reddish brown, dark spots present chiefly on ventral surfaces of segments and on telson. First metasomal segment bears 10 carinae, second through fourth bear eight carinae. Terminal tubercle on second and third metasomal segments slightly enlarged. Subaculear tooth dorsally with 3 granules on dorsal surface in two rows. Pectinal teeth number 12–14 in females.
DISTRIBUTION. Philippines (Fig. 225).
Reddyanus neradi (KovařÍk, 2013)
(Figures 198, 209, 225)
Isometrus (Reddyanus) neradi KovařÍk in KovařÍk et Ojanguren, 2013: 190–191, figs. 1348–1353.
TYPE LOCALITY AND TYPE REPOSITORY. Thailand, Namtok Phlio National Park, 12°31'50"S 102°11'03"E; FKCP.
TYPE MATERIAL. Thailand, Namtok Phlio National Park, 12°31'50"S 102°11'03"E, 2010, 1♂ (holotype), leg. L. Nerad, FKCP.
DIAGNOSIS. Total length of male holotype 32 mm. Pedipalps, legs and telson yellow, with brown spots. Base coloration yellow with dark spots, identical on femur and patella. First metasomal segment with 10 carinae, second through fourth with eight carinae, fifth with five carinae. Terminal tubercle on second and third metasomal segments slightly enlarged. Subaculear tooth wide, its terminus rounded, dorsally with 5 granules on dorsal surface in three rows. Telson length/ depth ratio in male is 2.82. Pectinal teeth number 12–13.
DISTRIBUTION. Thailand (Fig. 225).
Reddyanus petrzelkai (KovařÍk, 2003)
(Figures 199, 210, 225)
Isometrus vittatus: Fage, 1933: 28; Fage, 1936: 181; Fage, 1944: 71.
Isometrus (Reddyanus) vittatus: Vachon, 1976: 39 (in part), 42; Fet & Lowe, 2000: 153.
Isometrus (Reddyanus) vittatus: KovařÍk, 1994: 202 (in part); KovařÍk, 1995: 188 (in part); KovařÍk, 1997: 9 (in part); KovařÍk, 1998a: 37; KovařÍk, 1998b: 112 (in part).
Isometrus (Reddyanus) petrzelkai KovařÍk, 2003: 10; Lourenço et al., 2005: 58; KovařÍk in KovařÍk et Ojanguren, 2013: 191–192 (in part), figs. 1312–1316.
TYPE LOCALITY AND TYPE REPOSITORY. Vietnam, Dong Nai Province, 80 km NNE Ho Shi Minh City (formerly Saigon), valley Ma Da, Tri An dam; FKCP.
TYPE MATERIAL. Vietnam, Dong Nai Province, 80 km NNE Ho Shi Minh City (formerly Saigon), valley Ma Da, Tri An dam, 1♀ (allotype), 27.IV.1996, 2♂ (holotype and paratype), III.1998, leg. K. Petrželka, FKCP.
DIAGNOSIS. Total length 45–58 mm (males) and 37 mm (female). Male has longer metasomal segments and telson. Segments of pedipalps approximately same length in both sexes. Pedipalps and legs yellow with black spots. Manus of pedipalps yellow, fingers black. Metasoma yellow with spots namely in female, fifth segment darker than preceding. First metasomal segment bears 10 carinae, second through fourth bear eight carinae, metasoma V bears five carinae, which can be reduced. Terminal tubercle on second and third metasomal segments of male very slightly enlarged. Telson reddish, elongate in males, shorter in females. Subaculear tooth large, rounded, dorsally with with 5–6 granules on dorsal surface in three rows. Pectinal teeth number 13–16.
DISTRIBUTION. Vietnam (Fig. 225).
Reddyanus rolciki sp. n.
(Figures 113–140, 200, 211, 225, Tables 2, 4)
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Isometrus (Reddyanus) petrzelkai KovařÍk in KovařÍk et Ojanguren, 2013: 191–192 (in part).
TYPE LOCALITY AND TYPE REPOSITORY. Vietnam, Bình Thuan Province, Phan Thiet, approximately 10º56'N 108º06'E; FKCP.
TYPE MATERIAL (FKCP). Vietnam, Bình Thuan Province, Phan Thiet, approximately 10º56'N 108º06'E, III.2014, 1♂ (holotype No. 560, maturity ecdysis 1.VIII.2014), leg. V. Fura, bred by F. KovařÍk; Cambodia, Mondol Kiri Province, Sen Monorom, 12°30'N 107°12'E, 600 m a. s. l., 22.-26.I.2006, 1♂ (paratype, Figs. 115–117), leg. S. BečvÁř, R. et H. Fouqué.
ETYMOLOGY. The species epithet is a patronym honoring the entomologist Jakub RolčÍk.
DIAGNOSIS. Adult males 47–50.5 mm long, female unknown. Males have elongate metasomal segments and telson. Femur and patella of pedipalps yellow without spots. Manus of pedipalps yellow with two or three black spots on external surface, fingers black. Metasoma yellow, with brown spots on ventral surfaces of metasoma I–IV and on posterior part of metasoma V. Telson reddish black. First metasomal segment bears 10 carinae, second through fourth bear eight carinae, lateral carinae on metasoma II represented only by several granules mainly in posterior part. Metasoma V bears five carinae. Terminal tubercle on second and third metasomal segments of males only very slightly enlarged. Telson elongate in males. Subaculear tooth large and rounded, dorsally with 5–6 granules in three rows. Pectinal teeth number 14–16 in males.
DESCRIPTION. The adult males are 47–50.5 mm long, female unknown. The habitus is shown in Figs. 113–116 and 140. For position and distribution of trichobothria of pedipalps see Figs. 125–128, and 130–131. Adult male with elongate and narrow metasomal segments and telson.
Coloration (Figs. 113–116, 140). The base color is yellow with reduced spots. The chelicera is yellow to black, strongly reticulated. The fingers of chelicerae are spotted, mostly black. The carapace and mesosoma are with a pattern that forms three dark longitudinal strips. The ventral side of the mesosoma is yellowe. The femur and patella of pedipalps are yellow without dark spots. The legs are also yellow with reduced black spots, totally absent on femur. The metasoma I–IV is yellow with black spots only on ventral surfaces, metasoma V and telson are reddish brown.
Carapace and mesosoma (Figs. 113–119). The entire carapace is covered with large granules; carinae are absent. The anterior margin of the carapace is medially convex. The mesosoma bears one median carina and is strongly granulated. Tergite VII is pentacarinate. The pectinal tooth count is 14– 16 in males. The pectine marginal tips extend to the quorter of the fourth sternite in the males. The pectines have three marginal lamellae and 8–10 middle lamellae. The lamellae and fulcra bear numerous light setae. Sternites are smooth with two parallel furrows except sternite VII which bears four incomplete carinae and is smooth. The glabrous zone in the middle of the posterior margin of sternite V present in shape of triangle.
Metasoma and telson (Figs. 135–137, 211). The first segment bears 10 carinae. The metasoma II–IV bear eight carinae, lateral carinae on metasoma II represented only by several granules in posterior part. The fifth segment bears five carinae. Ventral carina is present on the telson in males. Surfaces between metasomal carinae are obviously smooth, with small, sparse granules. Terminal tubercle on the second and the third metasomal segments of male only very slightly enlarged. The telson elongate in males. Subaculear tooth large and rounded, dorsally with 5–6 granules in three rows.
Pedipalps (Figs. 124–134). The pedipalps are very sparsely hirsute. The femur bears five and patella bears 7 granulated carinae. The chela is with four carinae. The chela is finely and patella and femur are rather densely granulated. Movable finger with six and fixed finger with seven rows of granules, both with several accessory granules and 6 external and 5 internal accessory granules.
Legs (Figs. 120–123, 138–139). The legs without tibial spurs. The tibia and tarsomeres of legs with setae not arranged into bristle combs on dorsal surfaces. Tarsomere II of leg IV with two sparse rows of <20 spiniform setae on ventral surface. The femur bears 3–4, and patella, 5 carinae; both femur and patella are granulated.
Measurements. See Table 2 AFFINITIES. The described features distinguish R. rolciki sp. n. from all other species of the genus. They are recounted in the key. Morphologically closest species is R. petrzelkai, which differs mainly by the color pattern of pedipalp femur and patella (see Figs. 199 versus 200).
DISTRIBUTION. Vietnam and Cambodia (Fig. 225).
Reddyanus schwotti sp. n.
(Figures 141–191, 201, 213, 225, Tables 3–4)
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Isometrus (Reddyanus) petrzelkai KovařÍk in KovařÍk et Ojanguren, 2013: 191–192 (in part).
TYPE LOCALITY AND TYPE REPOSITORY. Thailand, Sa Kaeo Province, Pang Sida, 13.593909ºN 102.122117ºE; FKCP.
TYPE MATERIAL (FKCP). Thailand, Sa Kaeo Province, Pang Sida, 13.593909ºN 102.122117ºE, X.2014, 1♀ (paratype, Figs. 143–144, 188, Tab. 3) 5 ♂ (holotype Figs. 141–142, 184–186, 187, 212, Tab. 3, and paratypes, Nos. 728, 729, 736; all males born in D. Hoferek’s care and raised to adulthood in captivity by D. Hoferek; the pregnant female leg. L. Nerad; Tao Island, Hin Wong Bay, 10°06'23"N 99°50'46"E, II.2012, 1♂ (paratype, Figs. 145–147, 170–171, 181–183, Tab. 3), leg. P. Schwott; Khao Sok, 13.1048534ºN 102.1936548ºE, X.2014, 1♂ 1♀ (paratypes, Figs. 148–149, 151–156, 166–169, 172–177, 189–190, 201, 213), leg. L. Nerad. Cambodia, Kampot Province, Bokor, 10°38'20.65"N 104°00'30.62"E, 990 m a. s. l., 14.XI.2013, 1♂ (paratype, Figs. 150, 157–165, 178–180, 191, maturity ecdysis 20.I.2014) 3♀ 4juvs. (paratypes), leg. O. Košulič, breed F. KovařÍk.
ETYMOLOGY. The species epithet is a patronym honoring Petr Schwott, the collector of a paratype of the new species.
DIAGNOSIS. Adult from 29 mm (male) to 38 mm (female) long. Male has elongate metasomal segments and telson. Pedipalps, legs and metasoma yellow to red, with reduced brown spots. Manus of pedipalps yellow with black spots, fingers reddish black. First metasomal segment bears 10 carinae, second through fourth bear eight carinae, lateral carinae on metasoma II represented only by several granules mainly in posterior part. Metasoma V bears five. Terminal tubercle on second and third metasomal segments of both sexes slightly enlarged. Subaculear tooth wide but its terminus not rounded, dorsally with 5–6 granules in three rows. Pectinal teeth number 14–15 in males, 12–14 in females.
DESCRIPTION. The adults are 29–38 mm (males) and 35–38 mm (females) long. The habitus is shown in Figs. 141–146, 187–191. For position and distribution of trichobothria of pedipalps see Figs. 158–161, and 163–164. Sexual dimorphism: adult male with longer metasomal segments and longer and narrower telson.
Coloration (Figs. 141–146, 187–191). The base color is yellow to orange with dark spots. The chelicera is yellow, strongly reticulated. The fingers of chelicerae are spotted. The carapace and mesosoma are with a pattern that forms three dark longitudinal strips. The ventral side of the mesosoma is yellow to yellowish brown with several spots on strnite VII. The femur and patella of pedipalps are yellow or orange with small reduced dark spots, both femur and patella are mostly yellow. The legs are also yellow or orange with black spots. The metasoma is yellowish or redish brown with black spots, metasoma V is darker than metasoma I–IV and telson is yellow, red to black.
Carapace and mesosoma (Figs. 141–152). The entire carapace is covered with large granules; carinae are absent. The anterior margin of the carapace is medially convex. The mesosoma bears one median carina and is strongly granulated. Tergite VII is pentacarinate. The pectinal tooth count is 14–15 (9 x14, 7x15) in males, 12–14 (2x12, 7x13, 1x14) in females. The pectine marginal tips extend to the third quorter of the third sternite to quorter of the forth sternite in males and to the third quorter of the third sternite in females. The pectines have three marginal lamellae and 7–8 middle lamellae. The lamellae and fulcra bear numerous light setae. Sternites are smooth with two parallel furrows except sternite VII which bears four carinae partly reduced in females. The glabrous zone in the middle of the posterior margin of sternite V present but reduced in both sexes.
Metasoma and telson (Figs. 153–154, 172–186). The first segment bears 10 carinae. The metasoma II–IV bear eight carinae, lateral carinae on metasoma II represented only by several granules in posterior part. The fifth segment bears five carinae. Ventral carina is present on the telson in male and ventral and lateral crinae in female. Surfaces between metasomal carinae are obviously smooth, with small, sparse granules that become more numerous on metasoma I–III mainly in female. Terminal tubercle on second and third metasomal segments of both sexes very slightly enlarged. The telson longer and narrower in male. Subaculear tooth wide but its terminus not rounded, dorsally with 5–6 granules in three rows.
Pedipalps (Figs. 155–165). The pedipalps are very sparsely hirsute. The femur bears five granulated carinae and patella bears 7 granulated carinae. The chela is with four carinae granulated in both sexes more developed in female The chela is finely and patella and femur are rather densely granulated. Movable finger with six and fixed finger with seven rows of granules, both with several accessory granules and 6 external and 5–6 internal accessory granules.
Legs (Figs. 166–171). The legs without tibial spurs. The tibia and tarsomeres of legs with setae not arranged into bristle combs on dorsal surfaces. Tarsomere II of leg IV with two sparse rows of <20 spiniform setae on ventral surface. The femur bears 3–4, and patella, 5 carinae; both femur and patella are granulated.
Measurements. See Table 3.
AFFINITIES. The described features distinguish R. schwotti sp. n. from all other species of the genus. They are recounted in the key. Morphologically closest is R. petrzelkai which differs mainly by total length of male 45–58 mm (total length of R. schwotti sp. n. males is 29–38 mm), rounded terminus of subaculear tooth (Fig. 210) (subaculear tooth wide but terminus not rounded in R. schwotti sp. n., Figs. 212–213), and by the color pattern of pedipalp femur and patella (see Figs. 199 versus 201).
DISTRIBUTION. Thailand and Cambodia (Fig. 225).
Reddyanus zideki (KovařÍk, 1994)
(Figures 202, 214, 225, 226)
Isometrus (Reddyanus) zideki KovařÍk, 1994: 195; KovařÍk, 1997: 9; KovařÍk, 1998a: 36; KovařÍk, 1998b: 112; Fet & Lowe, 2000: 153; KovařÍk, 2003: 13; KovařÍk in KovařÍk et Ojanguren, 2013: 193, 194, figs. 1317– 1320.
TYPE LOCALITY AND TYPE REPOSITORY. Malaysia, Cameron Highlands; FKCP.
TYPE MATERIAL. Indonesia, Kalimantan, Nanga Pinoh, Tontag, 26.VII.1993, 1♀ (paratype), leg. J. Schneider. Malaysia, Cameron Highlands, 1992, 1♂ 1♀ (holotype and paratype), 1994, 1♂7♀ (paratypes), FKCP, NMPC.
ADDITIONAL MATERIAL EXAMINED. Malaysia, Terengganu State, Kg. Bintang env., 21.-22.II.1988, 1♀, leg. S. BečvÁř; Templer park, ca 50 km near Kuala Lumpur, IV.2002, 1♂ (Fig. 226) 1♀, leg. V. Šejna, FKCP.
DIAGNOSIS. Total length of males 29–33 mm, of females 25– 31 mm. Male has slightly longer metasomal segments and wider manus of pedipalp chela. Pedipalps and legs yellow, with dark spots. Base coloration identical on femur and patella. Manus of pedipalps yellow, fingers black. Metasoma yellow to reddish with brown spots, fourth and fifth segments of metasoma and telson darker. First metasomal segment bears 10 carinae, second through fourth bear eight carinae, metasoma V bears five carinae, which can be reduced. Terminal tubercle on second and third metasomal segments slightly enlarged. Subaculear tooth large but not rounded, dorsally with 3 granules in two rows. Pectinal teeth number 10–13 in both sexes.
DISTRIBUTION. Indonesia (Kalimantan), Malaysia (Malay Peninsula) (Fig. 225).
Key to species of Reddyanus of Southeast Asia
(Cambodia, Indonesia, Malaysia, Philippines, Thailand, and Vietnam)
1. Subaculear tooth with two symmetrical granules on dorsal surface in a row. ................… R. kurkai (KovařÍk, 1997)
– Subaculear tooth with granules on dorsal surface in two or three rows. ..................................................................... 2
2. Subaculear tooth with 3–4 granules on dorsal surface in two rows (Figs. 203, 206). ............................................ 3
– Subaculear tooth with 5–6 granules on dorsal surface in three rows (Figs. 204, 209). .......................................... 7
3. Terminal tubercle of dorsal carina on metasoma II of male markedly enlarged (Fig. 192). .... R. feti (KovařÍk, 2013)
– Terminal tubercle of dorsal carina on metasoma II of male not markedly enlarged (Figs. 194, 195, 202). ................ 4
4. Metasoma more elongate in females, metasoma IV length/ width ratio is 3 in females. .. R. navaiae (KovařÍk, 1998)
– Metasoma IV length/ width ratio is 2.3–2.72 in females.. ....................................................................................... 5
5. Metasoma more elongate in males, metasoma III length/ width ratio is 3–3.44 in males (Figs. 194–195). ............ 6
– Metasoma shorter in males, metasoma III length/width ratio is 2.43 (Fig. 202). ............ R. zideki (KovařÍk, 1994)
6. Telson in male more globular and shorter (Fig. 206). Pedipalp patella with dark spots reduced (Fig. 195). ....... ............................................... R. jendeki (KovařÍk, 2013)
– Telson in male more narrow with aculeus more curved (Fig. 205). Pedipalp patella with dark spots more developed (Fig. 194). .......................... R. hofereki sp. n.
7. Patella of pedipalp with one large black spot covering 70% of surface (Figs. 193, 196, 197). ........................... 8
– Patella of pedipalp without a large black spot, patella and femur could be yellow or spotted (Figs. 198–201). .... 10
8. Metasoma more elongate in males, metasoma III length/ width ratio is 3.2–3.6 in males (Figs. 193, 196). ........... 9
– Metasoma shorter in males, metasoma III length/ width ratio is 2.77 in male (Fig. 197). ........... R. majkusi sp. n.
9. Telson in male more elongate (Fig. 204). Telson length/ depth ratio in male is 3.43. ....................... R. furai sp. n.
– Telson in male shorter (Fig. 207). Telson length/depth ratio in male is 2.96. ....... R. krasenskyi (KovařÍk, 1998)
10. Second metasomal segment with 10 carinae. ................... ..................... R. deharvengi (Lourenço & Duhem, 2010)
– Second metasomal segment with 8 carinae. ................ 11
11. Telson of males elongate, aculeus short. Telson length/ depth ratio is 3.01–3.48 (Figs. 210–213). ................... 12
– Telson of male shorter, aculeus longer. Telson length/depth ratio is 2.82 (Fig. 209). ........... R. neradi (KovařÍk, 2013)
12. Pedipalp femur and patella yellow without dark spots (Fig. 200). ............................................... R. rolciki sp. n.
– Pedipalp femur and patella yellow with black spots (Figs. 199 and 201). ............................................................... 13
13. Total length of males 45–58 mm. Subaculear tooth wide and rounded (Fig. 210). .... R. petrzelkai (KovařÍk, 2003)
– Total length of males 29–38 mm. Subaculear tooth wide but its terminus not rounded (Figs. 212–213). ................. .............................................................. R. schwotti sp. n.
description: Published as part of Kovařík, František & Šťáhlavský, František, 2019, Revision of the genus Reddyanus from Southeast Asia, with description of five new species from Cambodia, Malaysia, Thailand and Vietnam (Scorpiones: Buthidae), pp. 1-45 in Euscorpius 295 on pages 1-43, DOI: 10.5281/zenodo.6540166