Strigamia platydentata Shinohara, 1981

Yu, Yifei, You, Chunxue & Jiang, Chao, 2025, Taxonomy of the Strigamia centipedes from the East Asian mainland (Geophilomorpha, Geophilidae), Zoosystematics and Evolution 101 (4), pp. 2065-2101 : 2065-2101

publication ID	https://doi.org/10.3897/zse.101.160146
publication LSID	lsid:zoobank.org:pub:36BF9A44-E5AD-4AA0-A4AF-5F90E7083588
DOI	https://doi.org/10.5281/zenodo.17485645
persistent identifier	https://treatment.plazi.org/id/331B5852-2B25-5996-B859-15043A2EFD56
treatment provided by	Zoosystematics and Evolution by Pensoft
scientific name	Strigamia platydentata Shinohara, 1981
status

Treatment

Figs 1 E View Figure 1 , 6 View Figure 6

Strigamia platydentata Shinohara, 1981: 43, figs 1–6; Bonato et al. 2012: 17. View in CoL

Material examined.

China – Henan Province • 1 ♂, 2 ♀♀ ( CMMI 20210702001 D – 003 D), Luoyang , 2. vii. 2021, leg. Junduo Zhang .

Diagnosis.

Body length reaching at least 42 mm ( 15–22 mm long in Shinohara, 1981); number of leg-bearing segments usually 55–57 ( 55 ♂ – 59 ♀ pairs of leg-bearing segments in Shinohara, 1981); with transverse suture on the cephalic plate; cephalic pleurite without setae; with 28 pectinate hyaline teeth in the mandible; anterior margin of the second maxillae coxosternite deeply concave; telopodite distinctly longer than coxal projection of the first maxillae; denticle of the tarsungulum parallelogram-formed with a truncated anterior margin; 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 from femur to distal half of trochanteroprefemur; metasternites with dense setae of various sizes; metasternites without mid-longitudinal deep sulcus; pore-fields not on the anterior part; distinct sulcus separating pretergite and intercalary pleurites of the ultimate leg-bearing segment; metasternite of the ultimate leg-bearing segment smooth, with no concave on each side; coxal pores at least 9 on each coxopleuron; all sparse on the ventral surface of the coxopleuron, distinctly denser close to the lateral margin of the metasternite.

Description.

General features. Body 42–57 mm long ( 15–22 mm long in Shinohara, 1981); with 55–57 leg-bearing segments ( 55 ♂ – 59 ♀ pairs of leg-bearing segments in Shinohara, 1981); narrowing forward and towards the posterior tip. Color (in ethanol 75 %) reddish yellow; forcipules darker.

Cephalic capsule (Fig. 6 A, C View Figure 6 ) sub-quadratic; ca. 1.1 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 2 medial prelabral setae 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. 6 B View Figure 6 ) almost uniform in width; ca. 3.7 times as long as the width of the head. Basal articles only slightly more elongated (article II ca. 1.1 times as long as wide); distal articles stouter (article XIII ca. 0.9 times as long as wide); article XIV ca. 2.1 times as long as wide. Setae gradually denser and shorter from the basal articles to the distal ones. Articles I – IX with distinctly two whorled long setae along with numerous short setae; remaining articles equipped with uniform setae.

Mandible (Fig. 6 D View Figure 6 ) with a single pectinate lamella with ca. 28 hyaline teeth.

First maxillae (Fig. 6 E View Figure 6 ). Coxosternite entire; uniformly areolate; without lappets; 1 + 1 setae on anterior middle part. Coxal projection sub-triangular; about as wide as long; ventral side with 3 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 4 + 2 long setae on distal half; dorsal surface with numerous small sensilla on distal half.

Second maxillae (Fig. 6 E View Figure 6 ). Coxosternite entire; uniformly areolate; anterior margin deeply concave, setae on anterior middle part indistinct. Telopodite composed of three articles; gradually narrowing towards the tip; claws simple; almost straight and gradually tapering on the telopodite.

Forcipular segment (Fig. 6 F View Figure 6 ). Tergite sub-trapezoid; with lateral margins convex and subparallel; ca. 2.6 times as wide as long. Coxosternite ca. 1.8 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. 1.2 times as wide as long; basal distance between trochanteroprefemora ca. 0.6 times of their basal breadth. Forcipular intermediate articles with slightly projections. Tarsungulum ca. 2.1 times as long as wide. Basal denticle of tarsungulum parallelogram-formed, with a truncated anterior margin, 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. 1.0 times as long as wide, situated in the distal half of trochanteroprefemur.

Leg-bearing segments (Fig. 6 G View Figure 6 ). Tergite 1 wider than metatergite 2; lateral margins converging backward. Metasternites sub-rectangular; with dense setae of various sizes; 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. 6 H – K View Figure 6 ). Pretergite and intercalary pleurites separated by distinct sulcus; pretergite ca. 3.0 times as wide as long on exposed part. Metatergite ca. 1.3–1.5 times as wide as long; sub-trapezoid. Metasternite sub-trapezoid; ca. 1.5–1.6 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 sparse setae of various sizes. Coxal pores 9–10 ( ♀), 9–10 ( ♂) on each coxopleuron; opening independently; all sparse on the ventral surface but densely in lateral margin of the metasternite and some of them covered by that; diameter of the coxal pores similar to that of the respective ducts; male setae slightly denser close to the ventral posterior edge of the coxopleuron, female sparse. Ultimate leg ca. 0.8 times as long as penultimate leg, distinctly swollen, with very dense setae on ventral and lateral sides. Ultimate pretarsus a claw; ca. 0.3 times as long as tarsus.

Postpedal segments (Fig. 6 H, J View Figure 6 ). Male: intermediate sternite distinct and exposed; first genital sternite separated from pleurites by distinct sutures; gonopods bi-articulate, with setae; penis conical; anal pores present. Female: intermediate sternite indistinct, medially not exposed; first genital pleurosternite ca. 1.9 times as wide as long, posterior margin slightly concave, uniformly with sparse setae; gonopods lamina bilobate, with sparse setae; anal pores present.

Remarks.

This species differs from its congeners in terms of the characteristic profile of the forcipular tarsungulum basal denticle. This species is recorded for the first time in China.

Distribution.

China ( Henan Province).

Kingdom	Animalia
Phylum	Arthropoda
Class	Chilopoda
Order	Geophilomorpha
Family	Geophilidae
SubFamily	Linotaeniinae
Genus	Strigamia