Lophoturus sineprocessus sp. nov.

Fig. 5

Type material.

Holotype: China • ♀; Yunnan, Xishuangbanna Dai Autonomous Prefecture, Jinghong, Menglai Rainforest Health Theme Park; 21 ° 96 ' 63 " N, 100 ° 80 ' 55 " E; 20 August 2023; Y. D. Wang leg.; GenBank: PQ 142933. CBF CZYNS 1 . Paratype: • 1 ♂, same data as the holotype .

Diagnosis.

Number of trichomes: posterior vertex: 28–36, collum: 76–84, lateral protuberance of collum: 6, tergite II: 82–88, tergite III: 80–84. Antennal article VI with 3 thick basiconic sensilla and 1 conical sensillum; article VII with 2 thick basiconic sensilla. Dorso-medial trichomes on each side consist of 6 sockets of trichome a, a single trichome b, and two large protruding base sockets of trichome c: c 1 and c 3. No linguiform processes on the labrum.

Description.

Female. With 13 pairs of legs. Measurements: Body length 2.0 mm, caudal bundle 0.38 mm.

Head (Fig. 5 A): Ommatidia absent. The posterior vertex has one pair of tufts arranged in two rows, with the anterior row consisting of 14 trichomes and the posterior row of 4 (Fig. 5 A). Trichomes are depicted in Fig. 5 J. Three trichobothria are arranged in an isosceles triangle, trichobothria a and b have typically thin sensory hairs with narrow cylindrical funicles compared to trichobothrium c, with a claviform funicle (Fig. 5 A). The gnathochilarium is typical of Lophoproctidae, featuring a single medial palp with 18 sensilla (Fig. 5 F). The clypeo-labrum possesses 4 + 1 + 4 setae and lacks linguiform processes on each side of the median cleft of the labrum (Fig. 5 E).

Antennae: Long antennae with proportions of antennal articles as depicted in Fig. 5 G. Antennal article VIII with 4 sensory cones; antennal article VI with 3 thick basiconic sensilla (a, i, and p) and 1 conical sensillum (c) (Fig. 5 I); article VII with 2 thick basiconic sensilla (Fig. 5 H).

Trunk: Collum, each with one pair of tufts consisting of 42 trichomes, lateral protuberance of collum with 6 trichomes in a row (Fig. 5 B). Tergite II, each with one pair of tufts consisting of 44 trichomes (Fig. 5 C). Tergite III, each with one pair of tufts consisting of 42 trichomes (Fig. 5 D). Tergites II – X exhibit consistent patterns of trichome insertions.

Legs (Fig. 5 K): Trochanter, post-femur, tibia, and tarsus I lack setae. Prefemur and femur each with 1 seta, coxa I with 1–2 setae, coxae II – XIII with 3–4 setae (Fig. 5 L), spine on tarsus II slightly shorter than telotarsus (Fig. 5 M). The telotarsus with two latero-dorsal denticles, a claw, and a small denticle (Fig. 5 N).

Telson: Dorso-medial trichomes on each side with 6 sockets of trichome a, a single trichome b, and two large protruding base sockets of trichome c: c 1 and c 3 (Fig. 5 P, the absence of c 2 is characteristic of Lophoproctidae species). Two bundles of caudal trichomes are unseparated. The telson trichomes are of two types, both exhibiting barbs (Fig. 5 O).

Male. With 13 pairs of legs. Measurements: Body length 1.8 mm, caudal bundle 0.3 mm. The posterior vertex possesses one pair of tufts arranged in two rows, with the anterior row consisting of 12 trichomes and the posterior row containing 2 trichomes. The gnathochilarium features 32 sensilla. The collum exhibits one pair of tufts, each consisting of 38 trichomes. Tergites II and III each bear one pair of tufts comprising 41 or 40 trichomes, respectively. Coxa I with 2 setae, coxa II with 3 setae, coxae III – VII with 4 setae, coxae VIII – XII with 2–3 setae, coxa XIII with no seta.

Distribution.

China (Yunnan).

Etymology.

The species name is derived from the absence of linguiform processes on each side of the median cleft of the labrum, a distinctive characteristic of the species.

Remarks.

The new species resembles Lophoturus jianshuiensis Ishii & Yin, 2000 but differs in the following aspects: absence of linguiform processes on each side of the median cleft of the labrum ( L. jianshuiensis has 1 pair of linguiform processes), female gnathochilarium with 18 sensilla (30 or 31 sensilla), dorso-medial trichomes on each side with 6 sockets of trichome a (5 sockets of trichome a).