Strigamia asiatica Jiang & Yu, 2025
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publication ID |
https://doi.org/10.3897/zse.101.160146 |
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publication LSID |
lsid:zoobank.org:pub:36BF9A44-E5AD-4AA0-A4AF-5F90E7083588 |
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DOI |
https://doi.org/10.5281/zenodo.17485653 |
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persistent identifier |
https://treatment.plazi.org/id/A9ED74A1-D362-54A4-861C-5674BCDFA8E6 |
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scientific name |
Strigamia asiatica Jiang & Yu |
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sp. nov. |
Strigamia asiatica Jiang & Yu sp. nov.
Figs 1 M View Figure 1 , 8 View Figure 8
Material examined.
Holotype. China • ♂ ( CMMI 20250307001 D ), Shandong Province, Jinan, Mt. Wanlingshan , 7. iii. 2025, leg. Xinyu Miao & Yukun Fan .
Paratype. China • 1 ♂ ( CMMI 20250417002 D ), Anhui Province, Chuzhou, Mt. Langyashan, Yujiawa ( 32.2778°N, 118.2950°E), 90 m asl., 17. iv. 2025, leg. Chao Jiang GoogleMaps .
Diagnosis.
Body length reaching at least 20 mm; number of leg-bearing segments usually 41–47; with transverse suture on the cephalic plate; cephalic pleurite evidently with sparse setae; with at least 23 pectinate hyaline teeth in the mandible; anterior margin of the second maxillae coxosternite shallowly concave; telopodite distinctly longer than coxal projection of the first maxillae; denticle of the tarsungulum sub-triangular, internal and external margins of the forcipular tarsungulum gradually converging all along the tarsungulum; calyx of poison gland ca. 1.8 times as long as wide, situated in the distal half of trochanteroprefemur; metasternites with sparse setae of various sizes; metasternites without mid-longitudinal deep sulcus; pore-fields not on the anterior part; pretergite and intercalary pleurites of the ultimate leg-bearing segment comprising a singular, undivided pleuropretergite; metasternite of the ultimate leg-bearing segment smooth, with no concave on each side; coxal pores at least 6 on each coxopleuron; the most posterior coxal pore on each coxopleuron distinctly displaced from all other pores.
Description.
General features. Body 20–30 mm long; with 41–47 leg-bearing segments; narrowing forward and towards the posterior tip. Color (in ethanol 75 %) shallow orange; forcipules darker.
Cephalic capsule (Fig. 8 A, C View Figure 8 ) sub-quadratic; ca. 1.0 times as wide as long; all margins convex; areolation uniform on the entire surface, less sclerotized along a distinct transverse suture; setae arranged scattered. Clypeus with rather uniform areolation; sclerotized along the anterior margin and a median triangular area; fading close to the labrum and the paraclypeal sutures; 5 post-antennal setae aligned on the anterior part of the clypeus, grouped in the medial part, and 1 medial prelabral seta on the posterior part of the clypeus. Labrum slightly projecting backwards medially, without distinct mid-piece; marginal denticles absent, with two unordered rows of long slender hyaline filaments along the entire labral margin and further rows of shorter filaments behind.
Antennae (Fig. 8 B View Figure 8 ) almost uniform in width; ca. 3.4 times as long as the width of the head. Basal articles only slightly more elongated (article II ca. 0.8 times as long as wide); distal articles stouter (article XIII ca. 1.8 times as long as wide); article XIV ca. 1.5 times as long as wide. Setae gradually denser and shorter from the basal articles to the distal ones. Articles I – IX with distinctly three whorled long setae along with numerous short setae; remaining articles equipped with uniform setae.
Mandible (Fig. 8 D View Figure 8 ) with a single pectinate lamella with ca. 23–27 hyaline teeth.
First maxillae (Fig. 8 E View Figure 8 ). Coxosternite entire; uniformly areolate; without lappets; setae on anterior middle part indistinct. Coxal projection sub-triangular; as wide as long; ventral side with 5 + 5 small setae on distal half; dorsal surface with numerous small sensilla on distal half. Telopodite longer than the coxal projection; distinctly articulated; without lappets; ventral side with 3 + 2 long setae and 1 + 2 short setae on distal half; dorsal surface with numerous small sensilla on distal half.
Second maxillae (Fig. 8 E View Figure 8 ). Coxosternite entire; uniformly areolate; anterior margin shallowly concave; setae close to the anterior margin indistinct. Telopodite composed of three articles; gradually narrowing towards the tip; claws simple; almost straight and gradually tapering on the telopodite.
Forcipular segment (Fig. 8 F View Figure 8 ). Tergite sub-trapezoid; with lateral margins convex and subparallel; ca. 2.3 times as wide as long. Coxosternite ca. 1.9 times as wide as long on exposed part; anterior margin moderately projecting with respect to its condyles; anterior border shallow concave medially; coxopleural sutures strongly converging backward. Trochanteroprefemur ca. 1.0 times as wide as long; basal distance between trochanteroprefemora ca. 0.6 times of their basal breadth. Forcipular intermediate articles with slight projections. Tarsungulum ca. 2.6 times as long as wide. Basal denticle of tarsungulum with distal margin slightly convex, basal margin quite straight and ca. 0.3 times as long as the basal breadth of the tarsungulum. Distal part of the tarsungulum uniformly tapering, its internal margin uniformly curved moderately concave and converging uniformly to the external margin. Calyx of poison gland ca. 1.8 times as long as wide, situated in the distal half of trochanteroprefemur.
Leg-bearing segments (Fig. 8 G View Figure 8 ). Tergite 1 wider than metatergite 2; lateral margins converging backward. Metasternites sub-rectangular; without a deeply mid-longitudinal sulcus. Posterior pair of sub-ovoid pore-fields present in all metasternites from 1 to penultimate. Pore-fields present also on all procoxae and metacoxae from 1 to penultimate. Legs 1 smaller than the others; pretarsus claw-like, reaching ca. 1 / 3 of the length of the tarsus.
Ultimate leg-bearing segment (Fig. 8 H, I View Figure 8 ). Pretergite and intercalary pleurites comprising a singular, undivided pleuropretergite; pretergite ca. 4.5 times as wide as long on exposed part. Metatergite ca. 1.2 times as wide as long; sub-trapezoid. Metasternite sub-trapezoid; ca. 1.5 times as wide as long; lateral margins slightly concave to nearly straight, converging backwards; posterior margin ca. 0.3 times as wide as anterior margin; with setae of various sizes. Coxal pores 5–6 on each coxopleuron; opening independently; all coxal pores distinctly aggregated close to the lateral margins of the metasternite, with the possible exception of a single pore on each coxopleuron; diameter of the coxal pores similar to that of the respective ducts; ventral of the coxopleuron with dense setae. Ultimate leg ca. 0.9 times as long as penultimate leg, with dense setae on ventral and lateral sides. Ultimate pretarsus a claw; ca. 0.2 times as long as tarsus.
Postpedal segments (Fig. 8 H View Figure 8 ). Male: intermediate sternite distinct and exposed; first genital sternite separated from pleurites by distinct sutures; gonopods bi-articulate, with setae; penis conical; anal pores indistinct.
Etymology.
The species epithet “ asiatica ” from Asia, refers to the geographic distribution of this species. It is used to distinguish it from other congeners with a single entire pleuropretergite an intact anterior dorsal plate, which are distributed in Europe and North America. We suggest the Chinese common name as “ 亚洲地蜈蚣 ”.
Remarks.
This is the first Strigamia species with a singular undivided pleuropretergite in the ultimate leg-bearing segment recorded in East Asia. Within this genus, this morphological feature has been reported in at least 11 species: S. acuminata (Leach, 1815) , S. bidens Wood, 1862 ; S. bothriopus Wood, 1862 ; S. cottiana Verhoeff, 1935 ; S. crassipes (C. L. Koch, 1835) , S. crinita ( Attems, 1929) , S. engadina ( Verhoeff, 1935) , S. epileptica Wood, 1862 ; S. exul ( Meinert, 1886) , S. lutea Matic, 1985 ; and S. transsilvanica (Verhoeff, 1928) . All these congeners are distributed across Europe and North America, except for S. transsilvanica , which has also been recorded in Japan by Takakuwa (1938, 1940). However, the validity of the Japanese record was challenged by Bonato et al. (2012), who suggested potential misidentification issues.
The new species is differentiated from its congeners through three principal morphological characters and biogeographical evidence: (1) the number of leg-bearing segments: the new species possesses 41–47 leg-bearing segments, in contrast to S. bidens ( Wood 1862; Attems 1929), S. epileptica ( Wood 1862; Chamberlin 1954), and S. exul ( Meinert 1886; Attems 1929) which all possess> 65 segments; (2) clypeal characteristics: the anterior clypeal region bears just 5 post-antennal setae (Fig. 8 C View Figure 8 ), differing significantly from S. acuminata ( Brolemann 1930: fig. 174; Iorio 2005: fig. 1 C; Bonato et al. 2023: fig. B), S. crassipes ( Iorio 2005: fig. 1 A; Bonato et al. 2023: fig. C), and S. transsilvanica ( Iorio 2005: fig. 1 B); and (3) forcipular morphology: the tarsungulum displays basally subparallel internal and external margins, gradually converging distally (cf. Bonato et al. 2012), a configuration distinct from that of S. engadina . Additionally, the morphological characteristics of the coxal pores were comparable to those of S. bothriopus ( Bonato et al. 2012: fig. 7), with the latter having coxal pores scattered on each coxopleuron. The new species can be distinguished by its geographic distribution from S. crinita , S. lutea , and S. cottiana , which are restricted to European territories distant from East Asia ( Bonato et al. 2012).
Distribution.
China ( Anhui, and Shandong Provinces).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Linotaeniinae |
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