Lophoturus sineprocessus, Wang & Jin & Gao & Wang & Dong, 2025

Lophoturus sineprocessus sp. nov.

Fig. 5 View Figure 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 View Figure 5 ): 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 View Figure 5 ). Trichomes are depicted in Fig. 5 J View Figure 5 . 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 View Figure 5 ). The gnathochilarium is typical of Lophoproctidae , featuring a single medial palp with 18 sensilla (Fig. 5 F View Figure 5 ). 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 View Figure 5 ).

Antennae: Long antennae with proportions of antennal articles as depicted in Fig. 5 G View Figure 5 . 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 View Figure 5 ); article VII with 2 thick basiconic sensilla (Fig. 5 H View Figure 5 ).

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 View Figure 5 ). Tergite II, each with one pair of tufts consisting of 44 trichomes (Fig. 5 C View Figure 5 ). Tergite III, each with one pair of tufts consisting of 42 trichomes (Fig. 5 D View Figure 5 ). Tergites II – X exhibit consistent patterns of trichome insertions.

Legs (Fig. 5 K View Figure 5 ): 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 View Figure 5 ), spine on tarsus II slightly shorter than telotarsus (Fig. 5 M View Figure 5 ). The telotarsus with two latero-dorsal denticles, a claw, and a small denticle (Fig. 5 N View Figure 5 ).

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 View Figure 5 , 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 View Figure 5 ).

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).