Research Article |
Corresponding author: Feng Zhang ( dudu06042001@163.com ) Academic editor: Yuri Marusik
© 2024 Tao Zheng, Jiaxian Gong, Feng Zhang.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Zheng T, Gong J, Zhang F (2024) Two new species of Bamazomus Harvey, 1992 from southern China (Schizomida, Hubbardiidae). ZooKeys 1204: 337-353. https://doi.org/10.3897/zookeys.1204.121754
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Two new schizomid species belonging to Bamazomus Harvey, 1992 are described from China: B. shanghang sp. nov. (♂♀) from Fujian Province and B. songi sp. nov. (♂♀) from Guangdong Province. In addition to their descriptions, illustrations and diagnoses, a distribution map is provided. These are first Bamazomus species from the mainland China and the northernmost in continental Asia.
Asia, morphology, short-tailed whipscorpions, taxonomy
Schizomida is an understudied arachnid order mainly distributed in tropical and subtropical areas. The order is a homogeneous group of 372 species unequally divided between Hubbardiidae Cook, 1899 and Protoschizomidae Rowland, 1975. In addition, there are 14 fossil species currently placed in Calcitronidae Petrunkevitch, 1945 (two species) and Hubbardiidae (12 species). Hubbardiidae, which is distributed worldwide, is the largest schizomid family with 356 species placed in 69 genera; among them there are three genera and four species recorded from China (
The genus Bamazomus Harvey, 1992 was erected to receive B. bamaga Harvey, 1992. The taxonomically diagnostic characters are female genitalia with a gonopod and numerous lobes and a dorso-ventrally flattened male flagellum. Currently, Bamazomus comprises 11 species distributed from Madagascar to Australia, except for one widespread, introduced species, B. siamensis (Hansen, 1905), which has been recorded from Hong Kong (China), Hawaii (USA), Ryukyu Islands (Japan), and Bangkok (Thailand) (
Extensive collecting in 2022 and 2023 from southern China helped us gain a deep understanding of the natural habitat of schizomids and allowed us to obtain additional specimens of this group. In this paper, two new Bamazomus species, B. shanghang sp. nov. and B. songi sp. nov. are described from China.
Specimens are deposited in the Museum of Hebei University (MHBU), Baoding, China. All measurements in the text are given in millimetres, and the total length excludes the flagellum. The spermathecae were removed and cleared in a pancreatin solution (
Abbreviations: AB anterior branch of chitinized arch, AT accessory tooth of movable finger, Dm dorso-median setae of abdomen and flagellum, Dl dorso-lateral setae of the abdomen and flagellum, Fe femur ectally, Fed femur dorso-ectally, Fev femur ventro-ectally, Fm femur mesally, Fmd femur dorso-mesally, Fmv femur ventro-mesally, G setal group numbers of chelicerae, GT guard tooth of movable finger, IA internal angle of chitinized arch, L lobe, LT lateral tip of chitinized arch, Msp patches of microsetae of the male flagellum, PB posterior branch of chitinized arch, Pe patella ectally, Pm patella mesally, Pmm mid mesal part of patella, Pme mid ectal part of patella, S serrula, Ter row of tibia externally, Tmr row of tibia medially, Tir row of tibia internally, Vm ventro-median setae of the abdomen and flagellum, Vl ventro-lateral setae of the abdomen and flagellum.
Bamazomus bamaga Harvey, 1992 from Queensland.
Bamazomus resembles Apozomus Harvey, 1992 and can be distinguished from it by: 1) spermathecae with numerous lobes vs only with two pairs of lobes; 2) flagellum with posterior process in male vs without posterior process. Currently 11 species of the genus are known to occur from Madagascar to Australia. There is only one anthropochorous species, B. siamensis (Hansen, 1905), which is known outside of natural range. It is known from Thailand (type locality), Hawaii, Ryukyu Islands, and Hong Kong. Until now only this species was known from the continental part of Asia, namely from Bangkok (
Holotype ♂ (MHBU-2023312-1), China: Fujian Province, Longyan City, Shanghang County, Shanghang National Forest Park, 25.6364°N, 116.9097°E, 672 m elev., 22.VII.2023, leg. T. Zheng, J.-X. Gong. Paratype: 1♀ (MHBU-2023312-2), same data as the holotype.
The specific name is a noun in apposition, referring to the name of the type locality.
The new species resembles B. siamensis in having three posterior processes and a small, conical protuberance on the posterior margin of flagellum in the male, and spermathecal lobes with several apical apophyses (
Holotype Male (Fig.
Bamazomus shanghang sp. nov. | Bamazomus songi sp. nov. | ||||
---|---|---|---|---|---|
Male (Holotype) | Female (Paratype) | Male (Holotype) | Female (Paratype) MH BU-ZT5-2 | ||
Total Length | 4.37 | 4.52 | 5.41 | 5.51 | |
Propeltidium | Length | 1.45 | 1.53 | 1.39 | 1.49 |
Width | 0.87 | 0.87 | 0.97 | 0.86 | |
Flagellum | Length | 0.67 | 0.78 | 0.69 | 0.49 |
Width | 0.35 | 0.09 | 0.34 | 0.09 | |
Height | 0.30 | 0.09 | 0.30 | 0.09 | |
Leg I | Coxa | 1.00 | 0.81 | 1.17 | 0.73 |
Trochanter | 0.59 | 0.46 | 0.79 | 0.46 | |
Femur | 2.37 | 1.51 | 2.48 | 1.45 | |
Patella | 3.16 | 2.03 | 3.50 | 1.93 | |
Tibia | 2.38 | 1.47 | 2.26 | 1.44 | |
Basitarsus | 0.64 | 0.43 | 0.76 | 0.44 | |
Telotarsus | 1.48 | 0.65 | 0.91 | 0.55 | |
Total | 11.57 | 7.36 | 11.87 | 7.00 | |
Leg IV | Trochanter | 0.64 | 0.53 | 0.59 | 0.51 |
Femur | 1.84 | 1.59 | 2.23 | 1.58 | |
Patella | 0.90 | 0.68 | 0.99 | 0.66 | |
Tibia | 1.48 | 1.16 | 1.68 | 1.10 | |
Basitarsus | 1.24 | 0.99 | 1.46 | 0.99 | |
Telotarsus | 0.81 | 0.71 | 0.88 | 0.70 | |
Total | 7.39 | 6.14 | 8.34 | 5.98 | |
Pedipalp | Trochanter | 0.66 | 0.65 | 0.37 | 0.71 |
Femur | 0.77 | 0.74 | 0.85 | 0.57 | |
Patella | 0.78 | 0.73 | 0.83 | 0.64 | |
Tibia | 0.73 | 0.71 | 0.79 | 0.62 | |
Tarsus | 0.37 | 0.28 | 0.34 | 0.36 | |
Total | 2.97 | 2.78 | 3.28 | 3.46 |
Chelicerae (Fig.
Chelicerae of Bamazomus shanghang sp. nov., holotype male and paratype female A male, mesal view B same, movable finger and fixed finger C female (tip broken), mesal view D same, movable finger and fixed finger. Abbreviations: AT = accessory tooth of movable finger, G = setal group numbers of chelicerae, GT = guard tooth of movable finger, S = serrula.
Palps (Fig.
Legs: leg I, basitarsal–telotarsal proportions: 32: 5: 6: 6: 7: 6: 12. Femur IV 3.14 times longer than high.
Opisthosoma: tergite I with three pairs of microsetae anteriorly and one pair of Dm; tergite II with three pairs of microsetae anteriorly and pair of Dm; tergites III–VII with one pair of Dm setae each; tergite VIII with pairs Dm and Dl2; tergite IX with pairs Dm, Dl1 and Dl2. Segments X, XI telescoped, with setal pairs Dm, Dl1, Dl2, Vm2, Vl1, Vl2, and single Vm1; segment XII with Dm, Dl1, Dl2, Vm2, Vl1, Vl2, and single Vm1, with posterodorsal process. Sternites II–VII with two irregular rows of setae each; genital plate with scattered setae.
Flagellum (Figs
Flagellum of Bamazomus shanghang sp. nov., holotype male and paratype female A male, dorsal view B same, ventral view C same, lateral view D female, dorsal view E same, ventral view F same, lateral view. Abbreviations: Dm = dorso-median setae of abdomen and flagellum, Dl = dorso-lateral setae of the abdomen and flagellum, Vm = ventro-median setae of the abdomen and flagellum, Vl = ventro-lateral setae of the abdomen and flagellum.
Female. Paratype (Fig.
The female of new species has a more pronounced apical process of the palpal trochanter than the male, which is uncommon and generally opposite to other schizomids. Usually, there are two or three G4 on the chelicerae in Hubbardiidae, and these are concentrated in the lower row. G4 are easily confused with G7, but it is believed that G4 can be distinguished by their short setae which are thickened at the base (vs long setae which are not basally thickened), as seen in the new species.
The new species was collected under a heap of leaf-covered stones. The female specimen was collected from the underside of a stone, while the male was found in the ground under the stones.
This species is known only from the type locality (Fig.
Holotype ♂ (MHBU-ZT5-1), China: Guangdong Province, Chaozhou City, Raoping County, Raoyang Town, Gangxia Village, 24.0924°N, 116.8814°E, 177 m elev., 23.VIII.2023, leg. J.-X. Gong. Paratype: 2♂ 4♀ (MHBU-ZT5-2), same data as the holotype.
The specific name is a patronym in honour of the late academician Daxiang Song (1935–2008), a scholar of arachnology who was the first to describe Schizomida from China.
Bamazomus songi sp. nov. resembles B. shanghang sp. nov. in having three posterior processes and a small, conical protuberance on the posterior margin of flagellum in the male, and in having spermathecal lobes with several apical apophyses and an incomplete anterior branch (Figs
Holotype Male (Fig.
Chelicerae (Fig.
Chelicerae of Bamazomus songi sp. nov., holotype male and paratype female A male, mesal view B same, movable finger and fixed finger C female, mesal view D same, movable finger and fixed finger. Abbreviations: AT = accessory tooth of movable finger, G = setal group numbers of chelicerae, GT = guard tooth of movable finger, S = serrula.
Palps (Fig.
Legs: leg I, basitarsal–telotarsal proportions: 37: 5: 6: 7: 6: 7: 13. Femur IV 3.70 times longer than high.
Opisthosoma: tergite I with three pairs of microsetae anteriorly and pair of Dm; tergite II with three pairs of microsetae anteriorly and pair of Dm; tergites III–VII with one pair of Dm setae each; tergite VIII with pairs Dm and Dl2; tergite IX with pairs Dm, Dl1, and Dl2. Segments X, XI telescoped, with setal pairs Dl1, Dl2, Vm2, Vl1, Vl2, and single Vm1; segment XII with Dm, Dl1, Dl2, Vm2, Vl1, Vl2, and single Vm1, with posterodorsal process. Sternites II–VII with two irregular rows of setae each; genital plate with scattered setae.
Flagellum (Figs
Flagellum of Bamazomus songi sp. nov., holotype male and paratype female A male, dorsal view B same, ventral view C same, lateral view D female, dorsal view E same, ventral view F same, lateral view. Abbreviations: Dm = dorso-median setae of abdomen and flagellum, Dl = dorso-lateral setae of the abdomen and flagellum, Vm = ventro-median setae of the abdomen and flagellum, Vl = ventro-lateral setae of the abdomen and flagellum.
Female. Paratype (Fig.
The number of G4 on the chelicerae of both B. songi sp. nov. and B. shanghang sp. nov. is similar, with all of them exceeding three. Therefore, previous descriptions of some species in the Hubbardiidae might have confused G4 and G7.
Specimens of Bamazomus songi sp. nov. were collected under leaf-covered, relatively wet stones near a stream.
This species is known only from the type locality (Fig.
Thanks go to Jiaqi Zhao and Xiaoru Qi (Hebei University, China) for their help during the fieldwork. We are grateful to Lorenzo Prendini (American Museum of Natural History), Mark Harvey (Western Australian Museum), and an anonymous reviewer for their valuable comments on the manuscript, to subject editor Yuri Marusik (Institute for Biological Problems of the North RAS) and copy editor Robert Forsyth for their editorial efforts. We thank Dr Xinping Wang (University of Florida) for reviewing the English in the earlier draft.
The authors have declared that no competing interests exist.
No ethical statement was reported.
This study was supported by the National Natural Science Foundation of China (no. 32170468) and by the Science and Technology Fundamental Resources Investigation Program (grant no. 2022FY202100).
Tao Zheng: writing-original draft the manuscript, Jiaxian Gong:writing, Feng Zhang: review and editing.
Tao Zheng https://orcid.org/0009-0000-5936-9097
Jiaxian Gong https://orcid.org/0009-0009-4753-0360
Feng Zhang https://orcid.org/0000-0002-3347-1031
All of the data that support the findings of this study are available in the main text.