Tylopus tropicalis Likhitrakarn 2025, n. sp.
Year: 2025
Type: other
Abstract: Tylopus tropicalis Likhitrakarn, n. sp. (Figs 1-3) urn:lsid:zoobank.org:act: 659DCAD1-0B29-4445-8774-4DA522FC15CC TYPE MATERIAL. — Holotype. China • ♂; Yunnan Province, Xishuangbanna Dai Autonomous Prefecture, Xishuangbanna Tropical Botanical Garden; c. 600 m a.s.l.; 21°55’03.1”N, 101°16’17.2”E; 26.XI.2016; C. Sutcharit leg.; CUMZ-PD0028. ETYMOLOGY. — The species is so named to emphasize the tropical forest habitat of the type locality where the holotype was collected; adjective. DIAGNOSIS. — The new species seems to be particularly similar to both T. spinisterna Nguyen, 2012 from Vietnam and T. schawaller i Golovatch, 2013 from China, especially in its gonopodal conformation. Indeed, these species share a stout, high and suberect process h. However, the new species differs from T. spinisterna by having the solenomere more strongly twisted and longer than process h (Figs 2; 3A, B); the caudal corner of midbody paraterga is pointed and more strongly protruded behind (Fig. 1D), while midbody sterna show no modifications (Fig. 1G). The new species differs from T. schawalleri in having longer antennae, in the shape of sternal lobes between ♂ coxae 4, coupled with the pleurosternal carinae being complete crests with evident, sharp, caudal denticles produced past the rear tergal margin on rings 2-8 (Fig. 1C), gradually decreasing in size until ring 15 (Fig. 1H) (vs complete crests only on rings 2-7 and gradually decreasing in size until ring 11) and femora 4-12 each with an adenostyle distally on ventral side (Fig. 3D, C) (vs adenostyles absent). DESCRIPTION Length c. 20 mm, width of midbody pro- and metazona 1.6 and 2.4 mm, respectively (♂). Coloration of live animals dark castaneous brown (Fig. 1A), with contrasting light brown calluses of paraterga; venter and legs yellowish brown; coloration of alcohol material after five years of preservation faded to dark brown; calluses of paraterga yellowish brown to pallid, venter and legs light brown to light yellowish (Fig. 1 B-J). Clypeolabral region and vertex sparsely setose, epicranial suture distinct. Antennae long (Fig 1A), reaching to ring 4 when stretched dorsally. In width, head 1:1.2 ............................................................................................................................ 5 2. Coloration pale yellowish brown. Gonopod relatively simple, process h poorly developed, no additional outgrowths near base. ................................................................................................ T. sinensis Golovatch, 1995 — Coloration light brown to blackish brown. Gonopods more complex .......................................................... 3 3. Body smaller: length 17-20 mm. Coloration light brown. ♂ tarsal brushes present until ring 9. Gonopod process h present, hook-shaped and pointed ................................................................. T. uncinatus Golovatch, 2020 — Body larger: length ca 21-30 mm. Coloration light to blackish brown. ♂ tibial and tarsal brushes present until ring 17. Gonopod process h absent or present and disk-shaped ................................................................... 4 4. Body smaller: length 21-23 mm. ♂ prefemora clearly swollen laterally. Gonopod process h present, while solenophore with two characteristic distal spines (a and s) ........................................... T. similis Golovatch, 2014 — Body larger: length ca 30 mm. ♂ prefemora only very faintly bulged laterally. Gonopod process h absent, while solenophore without spines .................................................................................. T. kabaki Golovatch, 2014 5. Gonopod very simple, process h absent .............................................................. T. reductus Golovatch, 2013 — Gonopod process h present (Figs 2; 3A, B) .................................................................................................. 6 6. Body smaller: length 17 mm. Coloration whitish grey with a light brown pattern on pro- and metazona. ♂ legs without adenostyles ........................................................................................ T. schawalleri Golovatch, 2013 — Body larger: length ca 20-28 mm. Coloration otherwise. ♂ legs with adenostyles (Fig. 3C, D) ................... 7 7. Antennae longer, reaching until ring 4 when stretched dorsally. Only ♂ femora with tuberculiform adenostyles (Fig. 3C, D) .................................................................................................. T. tropicalis Likhitrakarn, n. sp. — Antennae shorter, extending only behind ring 2 or 3 when stretched dorsally. ♂ femora, postfemora, tibiae and tarsi with tuberculiform adenotyles ............................................................................................................. 8 8. Gonopod process h a very sharp tip and shorter than half solenophore height. Pleurosternal carinae present until ring 17 .................................................................................................. T. deharvengi Liu & Luo, 2013 — Gonopod process h stout and higher than half solenophore height. Pleurosternal carinae present until ring 11 ............................................................................................................... T. nigromarginatus Golovatch, 2018 REMARKS ON TYLOPUS SPECIES FROM CHINA Tylopus sinensis Golovatch, 1995 was the first species of Tylopus to be documented from China. It was so named to emphasize the country of origin (Golovatch 1995). Seven new species of Tylopus have since been described from China (Golovatch 2013, 2014, 2018, 2020; Liu & Luo 2013). The altitudinal distributions of the Tylopus species in China vary from lowland to high-montane (350-4025 m a.
Authors: Josiane, Natdanai Likhitrakarn, Sergei, Josiane Lips, Golovatch, Sergei I., Somsak, Ekgachai Jeratthitikul, Chirasak, Somsak Panha, Sutcharit, Chirasak
Language: English
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W6893269902
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