Machilontus (Protumidolontus) lii, Song & Mendes & Huang, 2012

Song, Zhi-Shun, Mendes, Luis F. & Huang, Fu-Sheng, 2012, A Review Of Microcoryphia Fauna From Vietnam, With New Subgenus, New Species Of Machilontus Silvestri (Machiloidea: Meinertellidae), And New Data For Sexual Dimorphism In The Order, Raffles Bulletin of Zoology 60 (2), pp. 313-327 : 320-326

publication ID	https://doi.org/ 10.5281/zenodo.4508513
persistent identifier	https://treatment.plazi.org/id/4C74E536-FFAE-FFAF-5A10-F39F831CF7A8
treatment provided by	Carolina
scientific name	Machilontus (Protumidolontus) lii
status	sp. nov.

Treatment

Machilontus (Protumidolontus) lii , new species

( Figs. 6 View Fig A–D, 7A–K, 8A–F, 9A–H, and 10A–I)

Material examined. — Holotype: male, Vietnam: Vinh Phuc, Tam Dao National Park (21°28'336.7"N, 105°38'09.4"E), disturbed forest, 1007 m, canopy fogging, coll. S. Q. Li, D. S. Pham & G. Zheng, 26 Jul.2008 ( IZCAS) . Paratypes. 1 male, 2 females, same data as holotype ; 2 female, Vietnam: Vinh Phuc, Tam Dao National Park (21°31'50.1"N, 105°33'43.4"E), natural forest, 1060 m, canopy fogging, coll. S. Q. Li, D. S. Pham & G. Zheng, 26 Jul.2008 ( IZCAS) GoogleMaps .

Description of males. — Body length (from apex of head to tip of abdomen) 9.7–10.1 mm; maximum antennae length 11.3 mm; cerci and caudal filament incomplete, not measured. Scale pattern unknown. General colour dark brown in scaled areas. Head and appendages devoid of scales, with a few dark brown epidermic patches or stripes ( Fig. 6 View Fig B–D).

Compound eyes with ratios of length to width 0.83–0.87 and line contact to length 0.62–0.64 ( Fig. 7 View Fig A–C). Lateral ocelli surrounded by a pale narrow margin in freshly collected specimens ( Fig. 6C View Fig ), and a small black pigmented patch on inner edge; ocelli long sole-shaped, nearly 3.5 times as wide as its length ( Fig. 7C View Fig ).

Frons produced in a large robust process above median ocellus between lateral ocelli; the process elongate, obtuse apically and directed anteriorly, with a pair of lateral dark patches from inner margin of lateral ocelli to subapex and a pair of dorsal pale patches; numerous long dark setae intercrossed at apex ( Fig. 7B, C View Fig ).

Antennae with scapus distinctly elongate, nearly three times as long as its width, with two bumps on base and apex of inner side; numerous long dark setae surrounding on the bumps ( Fig. 7D View Fig ).

Maxillary palps as follows ( Fig. 7 View Fig E–G): article I with dorsal triangular process well developed, much longer than inner basal process, slightly shorter than the maximum diameter of article I, two small inner processes above dorsal process and an additional small process on inner apex; article II with dorsal hook-like process large and elongate, incurved internally and ventrally, numerous black strong spines extending from base to beneath process on inner dorsal surface; article III distinctly elongate, nearly 2.5 times longer than article II, with dense slender long setae on ventral surface and denser long dark setae on dorsal surface, especially on basal half; articles IV–VII slender than proximal articles, with numerous dark setae; article V with 1–3 hyaline spines near dorsal apex; articles VI and VII with 21–22 and 35–37 hyaline spines from base to apex along dorsal surface, respectively. Ratio of length of articles VII: VI: V = 1: (0.91–0.94): (1.16–1.21). Distribution of pigmented patches of maxillary palps on inner surface as in Fig. 7E View Fig and on outer surface as in Fig. 7G View Fig .

Labial palps as in Fig. 7H View Fig , without distinct patches; article II distinctly elongate, with a long large process on apex; distal article clavate, slightly expanded apically.

Legs rarely pigmented, only fore and middle femora with small transverse spot on apex, and fore and middle tarsi II with small spot on base. Fore tibiae with characteristic field of numerous brownish strong setae on ventral border, middle and hind femora with numerous translucent long setae on ventral surface, and middle and hind tibiae with numerous brownish strong setae and translucent long setae on ventral surface. Distributions of pigmented patches and chaetotaxy of legs as in Fig. 7 View Fig I–K.

Coxites I distinctly shorter than coxites II, without sternite ( Fig. 8A). Coxites II rounded and expanded laterally, with relatively large sternite; stylets II long and robust, with long hyaline setae on inner surface ( Fig. 8B). Coxites III–IX glabrous, stylets III–IX with numerous short setae ( Fig. 8 C– E). Ratios of stylets (without terminal spine) to corresponding coxites as follows: 0.75–0.82 for coxites II, 0.45–0.53 for coxites V, 0.49–0.63 for coxites VIII, and 0.68–0.80 for coxites IX. Ratios of terminal spines to corresponding stylets as follows: 0.33–0.55 for coxites II, 0.99–1.0 for coxites V, 0.64–0.92 for coxites VIII, and 0.38–0.45 for coxites IX.

Parameres absent. Penis relatively large, nearly as long as half of coxites IX ( Fig. 8E), aperture reddish, pointed oval, surrounded by 2 rows of setae rising on small characteristic bumps ( Fig. 8F).

Description of females. — Body generally larger and longer than males, body length (tip of head to tip of abdomen) 10.3– 11.2 mm; maximum antennae length 12.6 mm; maximum cerci length 6.6 mm; maximum caudal filament length 10.4 mm ( Fig. 6A View Fig ).

Compound eyes with ratios of length to width 0.83–0.85 and line contact to length 0.60–0.65. Lateral ocelli similar to males, nearly four times as wide as long ( Fig. 9B View Fig ). Frons more or less convex between lateral ocelli, a pair of patches near inner margin of lateral ocelli dark and another pair of patches in middle paler, with two long dark setae in middle. Antennae with scapus relatively short, nearly 2.5 times as long as wide, only slightly convex near base of inner side, without long dark setae ( Fig. 9C View Fig ).

Maxillary palps similar to males, though neither with hooklike process on article II nor with specialised setae. Article V with 2–4 hyaline spines near dorsal apex, articles VI and VII with 22–23 and 32–38 hyaline spines from base to apex along dorsal surface, respectively. Ratio of length of articles VII: VI: V = 1: (0.92–0.96): (1.14–1.18). Distribution of pigmented patches on inner surface as in Fig. 9D View Fig . Labial palps as in Fig. 9E View Fig , article II distinctly elongate, with a small short process on apex.

Legs similar to males, but long pigmented stripes on femora and middle and hind tibiae distinct ( Fig. 9 View Fig F–H).

Abdominal coxites I–VII similar to males ( Fig. 10 View Fig A–D). Ratios of stylets (without terminal spine) to corresponding coxites as follows: 0.69–0.80 for coxites II, 0.46–0.50 for coxites V, 0.76–0.78 for coxites VIII ( Fig. 10E View Fig ), and 0.65– 0.69 for coxites IX ( Fig. 10H View Fig ). Ratios of terminal spines to corresponding stylets as following: 0.25–0.47 for coxites II, 0.62–0.77 for coxites V, 0.40–0.79 for coxites VIII, and 0.48–0.62 for coxites IX.

Ovipositor tertiary type, slightly extended beyond terminal spines of stylets IX. Gonapophyses VIII with nearly 70 divisions, most them with setae: basal 1/3 divisions with 5–6 short setae, remainders with 4 long setae, but apical division with 3 setae, penultimate and third with 2 setae ( Fig. 10F, G View Fig ). Gonapophyses IX slender, with nearly 60 divisions, basal 2/3 divisions glabrous, the remaining with 1–3 short setae ( Fig. 10I View Fig ).

Etymology. — The new species is named after Prof. Shu-Qiang Li, one of three collectors and an excellent arachnologist from China

Distribution. — Northern Vietnam (Vinh Phuc)