Chaerilus ojangureni, Kovařík, 2005

Kovařík, František, 2005, Two new species of the genus Chaerilus Simon, 1877 from Malaysia (Scorpiones: Chaerilidae), Euscorpius 26 (26), pp. 1-7 : 1-7

publication ID	https://doi.org/ 10.18590/euscorpius.2005.vol2005.iss26.1
publication LSID	lsid:zoobank.org:pub:06BD3B93-D827-4E31-9C18-F9EBA31A2743
persistent identifier	https://treatment.plazi.org/id/03A587EC-D22F-2118-4724-FA81FB337BC9
treatment provided by	Felipe
scientific name	Chaerilus ojangureni
status	sp. nov.

Treatment

Chaerilus ojangureni View in CoL sp. n.

( Figs. 1 and 2 View Figures 1–2 , Table 1)

TYPE LOCALITY. Malaysia, Selangor, Tanjung Karang env.; FKCP.

TYPE MATERIAL. Malaysia, Selangor, Tanjung Karang env., III. 1996, 1 ♂ (holotype), leg. P. Dorsak. The holotype is deposited in the author‘s collection (FKCP).

ETYMOLOGY: Named after Andrés Affilastro Ojanguren, an Argentine arachnologist who helps me with determinations of South American scorpions and contributes to improving my comparative collection.

DIAGNOSTIC CHARACTERS. Total length of the male holotype is 32 mm. For habitus see Figs. 1 and 2 View Figures 1–2 . Measurements of the carapace, telson, segments of the metasoma and segments of the pedipalps, and numbers of pectinal teeth are given in Table 1. The movable finger of pedipalp has seven cutting edges composed of granules. The fingers are entirely straight even in the male. Trichobothrium d 2 is situated on the dorsal surface of the patella (see fig. 34 in Kovařík, 2000: 59). The chela and patella of pedipalp have six carinae, the femur has three carinae; the chela is reticulated. Pectinal teeth number 5 to 6.

The first and fourth metasomal segments have 10 carinae, the second and third segments have eight carinae. The fifth metasomal segment has nine carinae, of which one ventral carina posteriorly branches to form the letter “Y“. All carinae consist of widely spaced rounded granules. All metasomal segments bear two dorsomedian carinae, the second to fourth lack ventral carinae, and the first to third lack ventral carinae. The space between carinae is irregularly granulated.

The carapace is sparsely covered by granules of unequal size. The mesosoma is dorsally granulated but lacks carinae, and its ventral surface is smooth, also without carinae.

AFFINITIES. The described features distinguish C. ojangureni sp. n. from all other species of the genus. In the available key (Kovařík, 2000: 69) this new species corresponds to C. agilis Pocock, 1899 , which however reaches over 47 mm, has entirely different fingers (see Fig. 3 View Figure 3 ), chela of pedipalp with eight carinae and femur of pedipalp with five carinae ( C. ojangureni sp. n. has six and three), and lacks carinae on the dorsal surface of metasomal segments. Morphologically, C. ojangureni sp. n. Appears to be more similar to C. laevimanus

Chaerilus sejnai Chaerilus 3 juveniles after first ecdysis, 3 second exuviae, 3 third

sp. n. ojangureni sp.n. exuviae and 3 fourth exuviae. All types are in the

male female male

author‘s collection ( FKCP), except of one paratype (a

holotype allotype holotype

Total length 16.6 18.4 32.0 juvenile after first ecdysis), which is at AMNH.

Carapace length 2.1 2.4 4.6

width 2.2 2.3 4.5 ETYMOLOGY: Named after Vladimír Šejna, who collected Metasoma the female whose offspring are the type specimens.

and telson length 8.3 8.8 19.1

segment I length 0.7 0.8 1.9

width 1.1 1.2 2.5 DIAGNOSTIC CHARACTERS. Total length is 16 mm to 22 segment II length 0.9 1.0 2.2 mm. For habitus see Figs. 5 and 6 View Figures 5–6 . Measurements of the width 1.0 1.0 2.3 carapace, telson, segments of the metasoma and segment III length 0.9 1.0 2.4 segments of the pedipalp, and numbers of pectinal teeth width 0.9 1.0 2.2

segment IV length 1.1 1.1 2.7 are given in Table 1. The movable finger of pedipalp has width 0.9 0.9 2.1 seven cutting edges composed of granules. The fingers segment V length 1.9 2.0 4.7 are straight in both sexes. Trichobothrium d 2 on the width 0.8 0.9 2.1 patella is situated either directly on the dorsal-internal telson length 2.6 2.9 5.2

Pedipalp surface boundary (holotype) (see fig. 36 in Kovařík, femur length 2.0 2.1 3.8 2000: 59) or on the internal surface (allotype). The chela width 0.7 0.7 1.5 of pedipalp has seven or eight carinae, the patella has patella length 2.4 2.2 4.0 five carinae, the femur has four carinae. The patella of width 0.8 0.9 1.6 chela length 4.1 4.5 7.9 pedipalp bears a pronounced internal tubercle, especially width 1.2 1.7 2.9 in males. Pectinal teeth number 3 (female) or 4 (males). finger mov. length 1.9 2.0 3.8 The male has relatively larger pectines and telson, and differs from the female also in the shape of pedipalp Pectinal teeth 4:4 3:3 5:6 manus.

The carinae of metasomal segments consist of large, Table 1: Measurements (in millimeters) of type specimens of pointed, widely spaced granules. The first metasomal the new species. segment has eight carinae, lacks ventral carinae, and its ventral side is smooth, devoid of granules. The second to fourth segments have six or eight carinae, may or may Pocock, 1899 (see Fig. 4 View Figure 4 ), which however also lacks not have two ventral carinae and lack two lateral carinae. carinae on the dorsal surface of metasomal segments and The fifth metasomal segment has seven carinae, of differs in the position of trichobothrium d 2 on the patella which one ventral carina posteriorly branches to form of pedipalp. the letter “Y“. The metasoma is smooth between carinae.

The entire carapace and mesosoma are sparsely

Chaerilus sejnai sp. n. covered by granules. The ventral side of mesosomal segments is smooth, without carinae.

( Figs. 5 and 6 View Figures 5–6 , Table 1)

AFFINITIES. The described features distinguish C. sejnai TYPE LOCALITY. Malaysia, Tioman Island, near Paya; sp. n. from all other species of the genus. C. sejnai sp. n. FKCP. is most similar to C. celebensis Pocock, 1894 , C.

petrzelkai Kovařík, 2000 and C. rectimanus Pocock, TYPE MATERIAL. Malaysia, Tioman Island, near Paya, 1899. Adults of these species are less than 30 mm long, IV.2002, 2♂ 7♀ (paratypes), leg. and bred by V. Šejna. and C. sejnai sp. n. is the smallest of them. C. sejnai sp. Three specimens born on 25.IX.2002 to a female n. is easily distinguished from C. petrzelkai (Vietnam), collected at the type locality by V. Šejna. First ecdysis whose metasomal segments are granulose ( Fig. 8 View Figure 8 ) was on 30.IX.2002, following that each specimen was including the ventral side of the first metasomal segment kept separately. They are 2♂ (holotype: second ecdysis (which in C. sejnai sp. n. is entirely smooth).

7.III.2003, third ecdysis 6.V.2003, fourth ecdysis This species is similar to C. celebensis from 16.VIII.2003; and paratype: second ecdysis 27.II.2003, Sulawesi (Celebes), Borneo, and Luzon ( Fig. 7 View Figure 7 ), but the third ecdysis 27.V.2003, fourth ecdysis 13.VIII.2003) female of C. sejnai sp. n. has a more inflated and longer and 1♀ (allotype: second ecdysis 17.IV.2003, third manus and a shorter fixed finger of pedipalp. This ecdysis 10. VI.2003, fourth ecdysis 10.III.2004; since difference is even more pronounced in the males (see July 2004 this female kept together with the male Fig. 5 View Figures 5–6 and figs. 12 and 13 in Kovařík, 2000: 52). holotype, on 29.I.2005 gave birth to 4 offspring). Also The most similar species is C. rectimanus from part of the type series are 2 juveniles before first ecdysis, Malaysia, whose males however lack the pronounced internal tubercle on the patella of pedipalp. Also the shape of the patella and chela of pedipalp are different (see Figs. 5 View Figures 5–6 and 9 View Figure 9 ) .