Vietnamorpha pumatensis Nguyen, 2017

Nguyen, Anh D., 2017, A second species of the genus Vietnamorpha Golovatch, 1984 (Polydesmida: Paradoxosomatidae) and notes on the generic relationship, Journal of Natural History 51 (39 - 40), pp. 2331-2343 : 2335-2338

publication ID	https://doi.org/10.1080/00222933.2017.1355491
publication LSID	lsid:zoobank.org:pub:C8A19CFD-1329-427A-B380-08542BB25718
persistent identifier	https://treatment.plazi.org/id/03E587B8-FFDD-FF87-E1E0-FADA992FF9EF
treatment provided by	Felipe
scientific name	Vietnamorpha pumatensis Nguyen
status	sp. nov.

Treatment

Vietnamorpha pumatensis Nguyen View in CoL sp. nov.

( Figures 1 View Figure 1 , 3–5 View Figure 3 View Figure 4 View Figure 5 )

Material examined

Holotype. 1 male ( IEBR-Myr 158H) Nghe An Prov., Pu Mat National Park, Chem waterfall, 430 m, 18.9715°N- 104.8008°E, 4–10 April 2011, coll. Anh D. Nguyen. GoogleMaps

Paratypes. 2 males, 3 females ( IEBR-Myr 158P); same data as for holotype GoogleMaps .

Diagnosis

The species differs from its congener, V. spiralis Golovatch, 1984 , in the gonopod femorite being erect and cylindrically elongate; and the solenomere being almost completely sheathed by solenophore, and being only exposed at the tip.

Etymology

Named after its type locality, Pu Mat National Park .

Description

Size: length ca. 19.3–19.7 mm (male), 18.1–20.0 mm (female); width of midbody pro- and metazonae 1.3–1.4 mm (male), 1.7–1.8 mm (female) and 1.5–1.7 mm (male), 1.9–2.1 mm (female), respectively. Holotype length ca. 19.7 mm, width of midbody pro- and metazonae 1.3 mm and 1.5 mm, respectively.

Body uniformly darkish brown with a broad median yellowish area on metaterga. Sterna and legs brownish yellow.

Head slightly broader than collum in width ( Figure 3 View Figure 3 (a)); clypeolabral region densely setose. Epicranial suture clearly distinct. Antennae long, reaching segment 4 if stretched posteriorly; antennomeres 2–4 slender while antennomeres 5–6 claviform; antennomeres 3> 4> 2 = 5> 6> 7> 1 in length; antennomere 7 with four sensory cones at tip.

Collum ( Figure 3 View Figure 3 (a–b)) subequal to segment 2 in width, oval-shaped; surface shining and smooth, neither wrinkled nor granulated, with three rows of setae: 6 + 6 anterior, 2 + 2 intermediate and 6 + 6 posterior. Axial line distinct. Paraterga totally absent.

Body ( Figure 3 View Figure 3 (a–f)) submoniliform, segment 4 <3 <2 = 5 − 17 in width, thereafter tapering towards telson. Prozonae and metazonae smooth and shining, neither granulated nor wrinkled. Metaterga 2–18 with a row of 2 + 2 setae near anterior margin. Transverse sulcus absent. Axial line distinctly present. Pleurosternal carinae present as a keel with a caudal denticle on segments 2–17. Waist between pro- and metazonae clearly broad, neither striolate nor beaded at bottom.

Paraterga ( Figure 3 View Figure 3 (c–d)) totally absent on poreless segments, but very tiny on porebearing segments. Ozopores normal, lying inside white hallows on lateral side of segments 5, 7, 9–10, 12–13, 15–19.

Epiproct ( Figure 3 View Figure 3 (f–g)) broadly truncated, dorsally inflattened. Tip with four spinnerets. Hypoproct trapeziform, with two well separated, distolateral, setiferous knobs ( Figure 3 View Figure 3 (h)).

Sterna ( Figure 3 View Figure 3 (e)) densely setose with four long sternal spines, each next to a coxa; posterior spines much more developed and longer than anterior ones. Cross impressions clearly distinct. Sternum 5 without modifications, but sternum 4 with two long, anteriorly curved, setiferous tubercles between coxae 3 ( Figure 3 View Figure 3 (i)).

Legs ( Figure 3 View Figure 3 (c–d)) slender, ca. 2.0–2.2 times as long as midbody height. Prefemora strongly swollen ventrally. Femora without modifications. Tarsal brushes, if present, only on pre-gonopodal legs.

Gonopod simple ( Figures 4–5 View Figure 4 View Figure 5 ). Coxite about 1/3–1/2 femorite length; distovental part sparsely setose. Prefemorite densely setose, separated laterally from femorite by an oblique sulcus. Femorite ( fe) erect, not curved, cylindrically elongate, without modifications, but with a distal small spine ( ds). Postfemoral region consisting only of solenophore ( sph) and solenomere ( sl). Solenomere completely sheathed by solenophore, and only exposed at the tip. Solenophore strongly coiled, almost twice. Tip with a small denticle ( sd) and a large pointed lobule ( pl).

Remarks

The species was found in the Pu Mat National Park ( Vietnam) where the forests are best conserved.