Bamazomus songi, Zheng & Gong & Zhang, 2024

Zheng, Tao, Gong, Jiaxian & Zhang, Feng, 2024, Two new species of Bamazomus Harvey, 1992 from southern China (Schizomida, Hubbardiidae), ZooKeys 1204, pp. 337-353 : 337-353

Bamazomus songi sp. nov.

Figs 1 , 8 , 9 , 10 , 11 , 12 , 13 , Table 1 宋氏巴马加盾

Type material.

Holotype ♂ ( MHBU - ZT 5-1 ), 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 - ZT 5-2), same data as the holotype .

Etymology.

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.

Diagnosis.

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 5 A, B , 6 A, B , 7 A, B ), but can be distinguished by: 1) the presence of seven or eight pairs of spermathecal lobes (Fig. 13 A, B ) vs five or six pairs of lobes (Fig. 7 A, B ); 2) the short, proximally gonopod broad and wide chitinized arch (Fig. 13 A, B ) vs the long, proximally narrow gonopod and narrow chitinized arch (Fig. 7 A, B ); 3) the Dm 4 anterior to the middle dorsal process of flagellum (Figs 11 A , 12 A ) vs Dm 4 on the middle dorsal process (Figs 5 A , 6 A ); 4) the Dm 4 anterior to Dl 3 and the Vm 5 anterior to Vl 2 on flagellum, the long, acuminate trochanter apical process on pedipalps in the male (Figs 10 A, B , 11 A – C , 12 A – C ) vs the Dm 4 posterior to Dl 3, the Vm 5 at same level as Vl 2, blunt and short (Figs 4 A, B , 5 A – C , 6 A – C ).

Description.

Holotype Male (Fig. 8 A, B ): measurements as in Table 1 . Colour: brownish. Prosoma: anterior process of propeltidium with three setae (pair of setae followed by single seta) followed four pairs of dorsal setae (2 + 2 + 2 + 2); eye spots distinct. Mesopeltidia separated. Metapeltidium divided. Anterior sternum with 11 setae (including two sternapophysial setae); posterior sternum triangular with six setae.

Chelicerae (Fig. 9 A, B ): movable finger: serrula with 17 teeth, guard tooth present, with one prominent accessory tooth at subterminal part of movable finger. Fixed finger with two large teeth and four smaller teeth, proximal tooth with one tiny, blunt lateral tooth. Setation: setal group formula: 3–6 – 4 – 5 – 13 – 10 – 1 – 5. G 1 with three spatulate setae; G 2 composed of six feathered setae; G 3 with four setae, feathered apically and smooth basally; G 4 consisting of five small setae, smooth, basally thick, distally elongated; G 5 A with 13 similar sized setae, feathered apically and smooth basally, length almost equal to movable finger; G 5 B with 10 setae, basal three short and smooth, apical seven longer and feathered; G 6 with one smooth seta about 1 / 2 of movable finger length; G 7 with five smooth setae.

Palps (Fig. 10 A, B ): 2.9 times longer than propeltidium length; trochanter with apical process, pointed apical process with angle of about 45 °; mesal surface of trochanter with three setae near ventral margin and one seta near dorsal margin; with one small mesal spur. Femur 2.4 times longer than high; ventral margin on ectal surface with acuminate setae Fe 1, Fe 5, Fev 1, Fev 2 and one dorsal setae Fed 3; mesal surface with a row of four ventral setae (Fmv 1–4) and one dorsal seta Fmd 3. Patella with three acuminate setae Pe and one seta Pme 1 on ventro-ectal surface; with three feathered setae Pm and one seta Pmm 3 on ventro-mesal surface. Setae formula on tibia 5–3 – 6. Tarsal spurs asymmetrical.

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 Dl 2; tergite IX with pairs Dm, Dl 1, and Dl 2. Segments X, XI telescoped, with setal pairs Dl 1, Dl 2, Vm 2, Vl 1, Vl 2, and single Vm 1; segment XII with Dm, Dl 1, Dl 2, Vm 2, Vl 1, Vl 2, and single Vm 1, with posterodorsal process. Sternites II – VII with two irregular rows of setae each; genital plate with scattered setae.

Flagellum (Figs 11 A – C , 12 A – C ): nearly rectangular in shape; 1.75 times longer than wide; posterior margin of flagellum with three posterior processes; the dorsal side with a small, conical protuberance; setation: seta Dm 1 situate base of bulb, two rows of microseate placed dorsolaterally next to Dm 1, each row with three microsetae; Dm 4 anterior to Dl 3; Dl 2 anterior to Dm 4; both sides of pedicel with Dl 1; Vm 1 posterior to Vm 2; Vm 3 anterior to Vl 1; Vm 5 anterior to Vl 2; two Msp between Vl 1 and Vl 2.

Female. Paratype (Fig. 8 C, D ): measurements as in Table 1 . Colour: brownish. pedipalps (Fig. 10 C, D ) similar to male, 2.30 times longer than propeltidium length, setae formula on tibia 4–5 – 4. Prosoma anterior process of propeltidium with three setae (pair of setae followed by single seta) followed by four pairs of dorsal setae. Flagellum (Figs 11 D – F , 12 D – F ) with three flagellomeres. Setation: Vl 1 anterior to Dl 2; Vm 1 at same level as Vm 2; Dl 4 posterior to Dm 4; Vl 2 anterior to Dl 3; Dl 1 anterior to Vm 3; Dm 4 posterior to Vm 5. Spermathecae (Fig. 13 A, B ) with seven or eight pairs of short, thick lobes; spermathecal lobes with many small apical apophyses and with slight bifurcations. Chitinized arch wide, heart-shaped; with a wide LT and with curved, wide and incomplete AB. Gonopod short and the base broad, with distal bifurcation. Chelicerae (Fig. 9 C, D ): movable finger with one prominent accessory tooth; serrula with 16 teeth. Fixed finger with two large teeth and five smaller teeth between these, including one tiny, blunt lateral tooth on proximal tooth. Setal group formula 3–6 – 5 – 4 – 11 – 9 – 1 – 5.

Comments.

The number of G 4 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 G 4 and G 7.

Habitats.

Specimens of Bamazomus songi sp. nov. were collected under leaf-covered, relatively wet stones near a stream.

Distribution.

This species is known only from the type locality (Fig. 1 ).

Figures

Figure 1. Type localities of Bamazomus songi sp. nov. (square) and B. shanghang sp. nov. (circle).

Figure 4. Palps of Bamazomus shanghang sp. nov., holotype male and paratype female A male, mesal view B same, ectal view C female, mesal view D same, ectal view.

Figure 5. 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.

Figure 6. 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.

Figure 7. Spermathecae of Bamazomus shanghang sp. nov. A, B female paratype, dosal view. Abbreviations: AB = anterior branch of chitinized arch, IA = internal angle of chitinized arch, L = lobe, LT = lateral tip of chitinized arch.

Figure 8. Habitus of Bamazomus songi sp. nov., holotype male and paratype female A male, dorsal view B same, ventral view C female paratype, dorsal view D same, ventral view.

Figure 9. 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.

Figure 10. Palps of Bamazomus songi sp. nov., holotype male and paratype female A male, mesal view B same, ectal view C female, mesal view D same, ectal view.

Figure 11. 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.

Figure 12. 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.

Figure 13. Spermathecae of Bamazomus songi sp. nov. A, B female paratype, dosal view. Abbreviations: AB = anterior branch of chitinized arch, IA = internal angle of chitinized arch, L = lobe, LT = lateral tip of chitinized arch.