Corresponding author: Huiqin Ma (
Academic editor: Marzio Zapparoli
The present paper describes a new species
The centipede subgenus
Sixty-seven species and subspecies of
All specimens were hand-collected under leaf litter or stones. The material was examined with the aid of a Motic-C microscope, made in China. Colour description is based on specimens in 75% alcohol, and body length is measured from anterior margin of the cephalic plate to posterior end of postpedal tergite. Type specimens are deposited in the College of Life Sciences, Hebei University, Baoding, China. Terminology for external anatomy follows
The following abbreviations are used in the text and tables: T, TT = tergite, tergites; S, SS = sternite, sternites; C = coxa, t = trochanter, P = prefemur, F = femur, Ti = tibia, a = anterior, m = median, p = posterior.
13 ♀♀, 12 ♂♂, Yongji County, Yuncheng City, Shanxi Province,
The specific name refers to the presence of a single pore on the coxae of legs 12–15.
A
Body length: 6.9–8.6 mm, cephalic plate 0.75–0.96 mm long, 0.75–0.96 mm wide.
Colour: basal antennal articles pale yellow-brown to chocolate, transition to yellow brownish from the twelfth article onwards, distalmost one yellow-brownish; tergites yellow-brown; cephalic plate, TT 1, 14 and 15 pale yellow-brown; pleural region pale grey with a yellowish hue, SS pale grey to grey with a purple hue; distal part of forcipules brown, basal and proximal parts of forcipules, forcipular coxosternite and SS 14 and 15 pale yellow-brown; all legs pale purple to grey, basal tarsus pale purple, distal tarsus yellow-brown.
Antennae: composed of 16–22 articles, commonly 20+20 articles; basal article long about equal to wide, the second markedly longer than wide, following articles gradually shortening, distal article much longer than wide, up to 2.0–2.5 times as long as wide; abundant setae on the antennal surface, less so on the basal articles, gradually increase in density towards the fourth article, then more or less constant in number.
Cephalic plate: smooth, convex, pigment concentrated as close netlike vein, long equal to wide; tiny setae emerging from pores and long setae scattered sparsely over the whole surface; frontal marginal ridge with shallow anterior median furrow; posterior margin of cephalic plate straight (
Ocelli: six–seven oval to rounded on each side (
Tömösváry’s organ: comparatively small (
Forcipular coxosternite: subtrapezoidal (
Tergites: smooth, without wrinkles, backside slightly hunched; T 1 posterolaterally narrower than anterolaterally, generally trapeziform, narrower than T 3 and the cephalic plate, T3 slightly narrower than the cephalic plate; posterior margin of T 1 slightly convex or straight, posterior margin of T 3 straight, posterior margin of TT 5, 8, 10, 12 and 14 slightly concave, posterior margin ridge of TT 3, 5, 8, 10 and 12 continuous; all posterior angles generally rounded, without triangular projections; lateral margin ridge of all tergites continuous; tiny setae scattered very sparsely over the surface.
Sternites: narrower posteriorly, generally trapeziform, comparatively smooth, setae emerging from pores scattered very sparsely over the surface, 1–3 slightly long setae on the surface of the anterior part of each sternite, 1–2 slightly long setae on the surface of the posterior part of each sternite.
Legs: strong, tarsi fused on legs 1–13, well-defined on legs 14 and 15; all legs with claws, fairly long, curved ventrad; anterior and posterior accessory spines on legs 1–14, the anterior one moderately slender, forming a small angle with the claw, the posterior spine short and strong, forming a large angle with the claw; no accessory spines on legs 15. Short to comparatively long setae scattered very sparsely over the surface of all segments of all legs, more setae scattered on the surface of tarsus; legs 14 and 15 thicker and stronger than other legs in the male; tarsus 1 4.4–5.5 times as long as wide, tarsus 2 about 73.3%–95.7% length of tarsus on legs 15. Plectrotaxy as in
Plectrotaxy of
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1 | p | am | m | p | ap | a | ||||
2–10 | p | am | m | p | ap | ap | ||||
11 | p | am | m | p | ap | ap | ||||
12 | p | am | m | mp | p | p | ||||
13 | mp | m | am | mp | p | p | ||||
14 | m | mp | m | a | mp | |||||
15 | m | mp | m | a | mp |
Coxal pores: 1111, round; coxal pore field set in a relatively shallow groove, the fringe of coxal pore-field with slightly eminence.
Female S 15: generally trapeziform, anterior half being broader posterior margin straight, long setae scattered sparsely over the surface; the sternite of genital segment well chitinised, wider than long; posterior margin of genital sternite deeply concave between the condyles of gonopods, except for a small, median approximately fingerlike bulge; short to long setae sparsely scattered over the ventral surface of the genital segment. Female gonopod: first article fairly broad, bearing 6–8 long setae, arranged in 3 irregular rows; 2+2 moderately small, coniform spurs, inner spur smaller (
Male S 15: trapeziform, the anterior half being broader; posterior margin straight, long setae scattered sparsely over the surface. Male first genital sternite: wider than long, usually well chitinized; posterior margin quite deeply concave between the gonopods, no bulge medially; comparatively long setae evenly scattered on the ventral surface, few setae near the S 15; gonopods short and small, with 1–2 long setae, apically slightly chitinized (
To assist in the identification of the Chinese species of
1 | Four ocelli on each side of cephalic plate, 17+17 antennal articles | |
– | Five or more ocelli on each side of cephalic plate, not less than 18+18 antennal articles | 2 |
2 | Five ocelli on each side of cephalic plate | |
– | Six or more ocelli on each side of cephalic plate | 3 |
3 | Second article of female gonopod with dorsolateral setae | 4 |
– | Second article of female gonopod without dorsolateral setae | 6 |
4 | Second article of female gonopod with three dorsolateral setae, 2222–3443 coxal pores | |
– | Second article of female gonopod with two dorsolateral setae, 1111–2222 coxal pores | 5 |
5 | 1222–2222 coxal pores | |
– | 1111 coxal pores | |
6 | Terminal claw of the female gonopod simple | |
– | Terminal claw of the female gonopod bidentate or tridentate | 7 |
7 | Terminal claw of female gonopod tridentate | 8 |
– | Terminal claw of female gonopod bidentate | 9 |
8 | Tömösváry’s organ slightly smaller than adjoining ocellus; terminal ocellus largest | |
– | Tömösváry’s organ slightly larger than adjoining ocellus or about same in size; terminal two ocelli largest | |
9 | Tömösváry’s organ larger than largest ocellus, antennae 20–25 articles | |
– | Tömösváry’s organ about same size as the adjoining ocelli, antennae 19 articles |
This study was supported by the National Natural Science Foundation of China (NSFC grant No. 31172057 and 30900131). We are grateful to Dr. Gregory D. Edgecombe, London, U. K., and Dr. Pavel Stoev, Sofia, Bulgaria, for their hospitality and everlasting help during our research, respectively. We thank Dr. Marzio Zapparoli, Viterbo, Italy, Dr. Rowland M. Shelley, North Carolina, USA, Dr. His-Te Shih, Taichung, China, and Ph.D Ivan H. Tuf, Olomouc, Czech Republic, for providing us with invaluable literature and comments. Thanks must go to Dr. Zi-Zhong Yang and Dr. Zhi-Sheng Zhang for their help in preparing the paper.