Pauropus dorsappendix Shen and Sun, 2007

Shen, Hong, Gai, Yonghua, Song, Daxiang, Sun, Hongying, Scheller, Ulf & Zhou, Kaiya, 2007, New species of Pauropodidae (Myriapoda: Pauropoda) from Nanjing, China, Journal of Natural History 41 (37 - 40), pp. 2313-2329 : 2323-2328

publication ID	https://doi.org/ 10.1080/00222930701565772
persistent identifier	https://treatment.plazi.org/id/391FC51F-FF9E-D161-ECD0-808174DCFD1A
treatment provided by	Carolina
scientific name	Pauropus dorsappendix Shen and Sun
status	sp. nov.

Treatment

Pauropus dorsappendix Shen and Sun View in CoL sp. n.

( Figure 6 View Figure 6 )

Type material

Holotype: ad. 9 (female), Zijin Mountain , 20 July 2006, leg. H. Shen et al . Paratypes: one ad. 9 (female), same data as holotype; one ad. 9 (male), Laoshan Mountain , 13 September 2006, leg. H. Shen et al .

Diagnosis

Pauropus dorsappendix seems to be most close to a group of species ( P. merinus , P. lauteli , P. antanosus , P. validus , P. fallaciosus ) described from Madagascar ( Remy 1956), but the shape of the median part of the anal plate (submedian appendages cleft distally) and the length proportions of the pygidial setae (a 1 and a 2. a 3) isolate the new species and its relationships cannot be disentangled.

Etymology

From the Latin dorsum 5 back and appendix 5 appendage (referring to the dorsal appendages of the anal plate).

Description

Length. (0.74–) 0.96 mm.

Head. Tergal setae thin, tapering, of medium length to fairly long, densely annulate. Relative lengths of setae: 1st row: a 1510, a 2511; 2nd row: a 1517 (–18), a 2511, a 3515; 3rd row: a 1517, a 25 (8–)9; 4th row: a 1514, a 2517, a 3518, a 4513. Ratio a 1 / a 1 – a 1 in 1st row 1.8(–1.9), in 2nd row 0.8, in 3rd row 7.0(–7.2), in 4th row (2.8–)3.0. Temporal organs in tergal view short and broad, 1.2 times as long as shortest interdistance. Head cuticle glabrous.

Antennae. Segment 4 with four setae, all thin, tapering, densely annulate. Relative lengths of setae: p 5100, p 9574(–79), p 05(86–)90, r 5(26–)31(–34). Tergal branch t thin, 4.7 (–5.0) times as long as greatest diameter and 1.4(–1.6) times as long as sternal branch s, the latter 3.0(–3.2) times as long as greatest diameter. Seta q with high insertion point, 1.1 times as long as s. Relative lengths of flagella (base segment included) and base segments alone: F 15100, bs 1510; F 2588 (–92), bs 259; F 35 (75–)80(–84), bs 358; F 1 1.4 times as long as t, F 2 and F 3 1.8(–2.0) and (1.4–)1.6 times as long as s, respectively. Globulus g with flattened capsule. Width of g 0.8 of greatest diameter of t.

Trunk. 4+4 setae on tergite I, 6+6 on II–IV, 6+4 on V, 4+2 on VI. Genital papillae short, almost twice longer than wide, widest in middle.

Bothriotricha. Relative lengths: T 15100, T 25 (104–)110(–112), T 35 (138–)150(–156), T 45170 (–175), T 55 (176–)180. All with simple straight axes with short oblique pubescence.

Legs. Coxa and trochanter of leg 9 with furcate setae; branches thick, subcylindrical, with short pubescence; branches subequal in length on coxa, secondary branch somewhat longer than primary branch on trochanter. Setae on legs 1–8 cylindrical, blunt, with rudimentary secondary branch.

Tarsus of leg 9 3.6(–3.8) times as long as greatest diameter. Setae thin, pointed, with short pubescence; proximal seta 0.2 length of tarsus and 6.2(–6.5) times as long as distal seta.

Pygidium. Tergum: posterior margin with rounded lobe above st. Relative lengths of setae: a 15100, a 25 (84–)95, a 3564 (–72), st 5(11–)13. All with short pubescence; a -group cylindrical, st tapering. Length of a 1 2.9(–3.0) times as long as interdistance, distance a 1 – a 2 as long as distance a 2 – a 3; distance st–st 3.2(–3.4) times as long as st and 0.5 of distance a 1 – a 1.

Sternum: posterior margin with broad shallow indentation between b 1. Relative lengths of setae (a 15100): b 1576 (–81), b 2543 (–46), b 3563 (–67). These setae tapering, with short pubescence. Distance b 1 – b 1 (0.8–)0.9 length of b 1; b 1 – b 2 0.5 length of b 2, distance b 3 – b 3 0.6(–0.7) length of b 3.

Anal plate: divided by a deep median U-shaped incision. Each half of plate divided into two parts by a V-shaped incision as deep as median one; lateral branches thick, diverging, pointed, 0.9 length of plate; submedian part cleft into two subcylindrical branches similar in length, each with distal, somewhat lanceolate shortly pubescent appendage.

Genus Stylopauropus Cook, 1896 View in CoL Subgenus Donzelotauropus Remy, 1957 View in CoL Stylopauropus (Donzelotauropus) zijinensis Shen and Zhou View in CoL sp. n.

( Figure 7 View Figure 7 )

Type material

Holotype: ad. 9 (female), Zijin Mountain , 12 August 2006, leg. H. Shen et al . Paratypes: one ad. 9 (female), same data as holotype; one ad. 9 (male), Laoshan Mountain , 2 October 2006, leg. H. Shen et al .

Diagnosis

The peculiar shape of the anal plate, with four short tergal appendages and two long ones protruding from distal part of sternal side, is difficult to connect with other species in the genus. The relationships cannot be traced at present.

Etymology

The species is named from the type locality, Zijin Mountain .

Description

Length. (0.66–) 0.76 mm.

Head. Tergal setae thin, tapering, of medium length to fairly long, densely annulate. Relative lengths of setae: 1st row: a 1510, a 2510 (–11); 2nd row: a 158, a 256 (–7), a 357; 3rd row: a 159, a 25 (7–)8; 4th row: a 159 (–10), a 2511 (–13), a 3512 (–13), a 4510 (–11). Ratio a 1 / a 1 – a 1 in 1st row 2.9(–3.0), in 2nd row 0.5(–0.6), in 3rd row 0.9(–1.1), in 4th row (1.1–)1.2. Length of temporal organs 1.6(–2.0) times as long as shortest interdistance. Head cuticle glabrous.

Antennae. Segment 4 with four setae, all thin, tapering, densely annulate. Relative lengths of setae: p 5100, p 95(59–)60(–62), p 0560(–63), r 5(27–)30(–32). Tergal branch t (4.0–) 4.1 times as long as greatest diameter and 1.6(–1.7) times as long as sternal branch s, the latter twice as long as greatest diameter. Seta q 1.4 times as long as s. Relative lengths of flagella (base segment included) and base segments alone: F 15100, bs 1510; F 2565 (–67), bs 257; F 35 (20–)23(–25), bs 353; F 1 4.5(–4.7) times as long as t, F 2 and F 3 2.6(–2.8) and (1.1–)1.2 times as long as s, respectively. Globulus g 1.8 times as long as wide; width of g 0.9 of greatest diameter of t.

Trunk. 4+4 setae on tergite I, 6+6 on II–IV, 6+4 on V, 4+2 on VI. Genital papillae blunt, almost 2.6 times as long as wide.

Bothriotricha. Relative lengths: T 15100, T 25 (107–)110(–113), T 35140 (–142), T 45 (178–) 180, T 55 (186–)190(–194). All with straight axes and sparse oblique pubescence.

Legs. Coxa and trochanter of leg 9 with furcate setae; branches thick, subcylindrical, striate, subsimilar in length on coxa, secondary branch shortest on trochanter. Setae on legs 1–8 cylindrical, blunt, with rudimentary secondary branch.

Tarsus of leg 9 slender, four times longer than greatest diameter. Setae thin, pointed, with short pubescence; proximal seta twice longer than distal seta.

Pygidium. Tergum: posterior margin rounded, with low semicircular lobe between st. Relative lengths of setae: a 15100, a 25 (88–)97, a 35 (132–)135(–141), st 518(–19). Setae a 1, a 2, and a 3 cylindrical, st clavate, converging. Distance a 1 – a 1 1.5(–1.6) times as long as a 1, distance a 1 – a 2 1.7(–1.9) times as long as distance a 2 – a 3; distance st–st 6.0(–6.2) times longer than st and about 0.7 of distance a 1 – a 1.

Sternum: posterior margin with shallow indentation between b 1. Setae cylindrical with short pubescence, relative lengths (a 15100): b 15 (87–)88(–89), b 3550 (–51). Distance b 1 – b 1 2.1(–2.2) times as long as b 1. Distance b 3 – b 3 twice longer than b 3.

Anal plate: semicircular, glabrous, posterolateral margin with four short appendages protruding backwards; sublateral appendages cylindrical, submedian ones short, triangular; two long appendages, 1.5 times as long as plate, protruding backwards from tergal side above triangular appendages; long appendages bipartite: proximal part cylindrical, glabrous, distal part fusiform, with short pubescence.