Parartemiopsis shangrilaensis, Shu & Chen & Rogers & Sanoamuang, 2023

Shu, Shu-Sen, Chen, Xiao-Yong, Rogers, D. Christopher & Sanoamuang, Laorsri, 2023, Parartemiopsis shangrilaensis, a new species of fairy shrimp (Branchiopoda, Anostraca) from Yunnan, with a key to the Chirocephalidae of China, ZooKeys 1168, pp. 355-366 : 355

publication ID	https://dx.doi.org/10.3897/zookeys.1168.104005
publication LSID	lsid:zoobank.org:pub:D8C5907B-F728-4BC6-83E8-A7B3B6C27345
persistent identifier	https://treatment.plazi.org/id/5062BFD3-2DC9-4C8F-B3E7-787B458BFCFF
taxon LSID	lsid:zoobank.org:act:5062BFD3-2DC9-4C8F-B3E7-787B458BFCFF
treatment provided by	ZooKeys by Pensoft
scientific name	Parartemiopsis shangrilaensis
status	sp. nov.

Treatment

Parartemiopsis shangrilaensis sp. nov.

Figs 1A -D View Figure 1 , 2A -F View Figure 2 , 3A -L View Figure 3 , 4 View Figure 4 , 5A -O View Figure 5

Parartemiopsis = Parartemiopsis sp. Shu et al. 2013.

Type materials.

Holotype: one male in alcohol, KIZ-CR-2011010. Allotype: one female in alcohol, KIZ-CR-2011011.

Type locality.

China: Yunnan Province: Shangri-La County: Patatson National Park: 27°52′2″N, 99°58′58″E, 3670 m a.s.l., a small, shallow temporal pond in Militang meadow; 20 August 2011; Shu S-S, Jiang W-S, and Zhao Y-P leg. Militang meadow is in an alpine valley surrounded by mountains covered in coniferous forest. A small river winds through the valley, which receives runoff from the surrounding slopes. The meadow has a mosaic of wetlands and uplands. This species is so far only known from the type locality.

Additional materials examined.

Same data as types: one male, six females ; 20 August 2011. Same location data as types: 10 males, 48 females ; 16 August 2019; Jiang W-S, leg.

Similar species.

Parartemiopsis longicornis (Smirnov, 1930).

Diagnosis.

Typical for genus. Male antennal appendage lamellar, subtriangular, apically subacute (Fig. 3E View Figure 3 ). Second antenna proximal antennomere lacking lateral hemispherical bulge. Second antenna distal antennomere medial surface with subproximal rounded protrusion covered in spinulae (Fig. 3H View Figure 3 ). Genital segment medial lamellar projection with medial longitudinal lines of spinulae elevated on crests (Fig. 3K View Figure 3 ).

Description.

Average length (head anterior margin to telson posterior margin): 7.4 mm (range 6.2-8.7 mm) in males; 7.9 mm (range 6.2-10.2 mm) in females.

Holotype male. Body red or jacinth in life (Fig. 1C View Figure 1 ). Head typical for genus. Eye plus peduncle length subequal to first antenna length. Eye large, width>0.2 × second antennal proximal antennomere medial width. First antenna long, filiform, extending to second antennae distal antennomere midlength, apex with five or six aesthetascs.

Antennal appendage lamellar, directed anteromedially, apex broadly triangular (Figs 2A View Figure 2 , 3E View Figure 3 ). Appendage basal portion inerm, distal portion bearing conical spinulae arranged in two or three marginal rows. Anterior surface with scattered, large, anteriodistally directed spines. Each anterior surface spine conical, 2-3 × lateral spinulae.

Second antenna extending to thoracopod IV or V (Fig. 1C View Figure 1 ). Second antenna proximal antennomere (Fig. 3A View Figure 3 ) subcylindrical, length nearly 1.5 × breadth. Posteriolateral surface with medial patch bearing ~10 setae (Fig. 3B View Figure 3 ). Lateral surface with rings composed of four or five micropapillae surrounding a single filiform seta (Fig. 3C View Figure 3 ). Anteromedial surface with denticulae and sparse setae (Fig. 3E View Figure 3 ). Anterior surface with five or six rows of setae, with groups of scattered micropapillae arranged as on lateral surface (Fig. 3F View Figure 3 ).

Distal antennomere laterally compressed, length ~1.5 × proximal antennomere. Distal antennomere narrowing to medial bend ~70° at proximal third of antennomere length (Figs 2A View Figure 2 , 3A, G View Figure 3 ). Just proximad to bend, medial surface with hemispherical protuberance covered in fine denticulae (Fig. 3A, H View Figure 3 ). Distal two-thirds parallel-sided with remainder straight to apex which is medially bent ~35° (Fig. 3A View Figure 3 ). Anterior margin with triangular projection midway between bend and apex. Apex subacute (Fig. 3A, I View Figure 3 ).

Thoracic segments dorsally smooth (Fig. 1C View Figure 1 ). Thoracopod I with praeepipodite divided, proximal portion oval, distal portion elongate-oval, both with margins inerm and smooth. Epipodite lamellar, length ~2 × width, apex angular. Exopod elongate oval, length <epipodite, proximolateral margin with five spines, remaining margins with plumose setae. Endopod broadly oval, margined with plumose setae. Endite VI broadly rounded, with long plumose marginal setae in two groups, bearing one and two middle submarginal spines, respectively. Endite V semicircular, proximal margin with two spiniform setae, remaining margins with plumose setae. Endites VI and III each with long plumose submarginal setae and three spiniform marginal setae. Endite I + II breadth greater than endites II-VI combined, bearing long plumose submarginal setae and one stout, spiniform marginal seta. Thoracopods II-XI serially homologous (Figs 2B View Figure 2 , 4 View Figure 4 ) with respect to thoracopod I, endites III-V margined with two or three spines.

Genital thoracic segments fused, ventrally expanded. Genital segment I (Fig. 3J View Figure 3 ) smooth, elongate, with paired longitudinal ventromedial ridges, their combined width approximately half segment width. Genital segment I distal margin with bead.

Gonopod rigid basal portion (Figs 2C, D View Figure 2 , 3K View Figure 3 ) with ventromedial longitudinal lamellar process, projecting posteriorly, with medial and lateral margins inerm, submedially with longitudinal arcuate carina margined with dense, fine denticulae, extending onto oblique distal margin (Fig. 3K, L View Figure 3 ). Gonopod small, lateral to lamellar process, subcylindrical, posteriorly directed; eversible portion unobserved.

Telson and cercopods as typical for genus. Cercopods margined with plumose setae.

Allotype female. Body reddish brown in life (Fig. 1D View Figure 1 ). Head smooth (Figs 2E View Figure 2 , 5A View Figure 5 ), first antenna length subequal to second antenna, apex with five or six aesthetascs (Fig. 5B View Figure 5 ). Second antenna (Figs 2E View Figure 2 , 5C View Figure 5 ) subcylindrical, with scattered, filiform setae, apex tapering to point (Fig. 5D, E View Figure 5 ). Thoracopods as in male. Thoracic segments X and XI with dorsolateral conical projections, apex spiniform (Figs 2F View Figure 2 , 5G-I, L View Figure 5 ). Genital thoracic segments fused (Fig. 5L View Figure 5 ). Genital thoracic segments with single dorsolateral sensory seta surrounded by four or five ridges (Fig. 5I-K View Figure 5 ). Brood pouch extending to abdominal segment II (Fig. 5G View Figure 5 ), width subequal to thorax (Fig. 5L View Figure 5 ). Telson and cercopods as in male.

Egg. Subspherical (Fig. 5N View Figure 5 ), diameter ~250 μm, with dense ridges ~50 μm wide, rounded in cross section. Ridges lacking spines, rarely closing to form polygons. Ridges separated by deep grooves ≤10 μm wide. Ridges rough, with dense, regularly distributed pores (Fig. 5O View Figure 5 ).

Etymology.

The specific epithet " shangrilaensis " refers to the species being from Shangri-La County. The gender is feminine.