Dicranocentrus wangi, Ma, Yitong & Chen, Jian-Xiu, 2007
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publication ID |
https://doi.org/ 10.5281/zenodo.179448 |
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DOI |
https://doi.org/10.5281/zenodo.5668119 |
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persistent identifier |
https://treatment.plazi.org/id/7B5D87EA-FFE5-383B-A8D6-FF0DFBD6C5E8 |
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treatment provided by |
Plazi |
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scientific name |
Dicranocentrus wangi |
| status |
sp. nov. |
Dicranocentrus wangi sp. nov.
Figs. 1–22 View FIGURES 1 – 12 View FIGURES 13 – 22 , Tabs. 1 View TABLE 1 –2
Description. Body length up to 2.5mm. Ground colour pale yellow. Eye patches dark blue. One small blue spot present between antennae. Blue pigment gradually darker from distal part of 2nd to 6th antennal segments and from distal part of femur to tibiotarsus ( Fig. 1 View FIGURES 1 – 12 ).
Head. Eyes 8+8, G and H smaller than others ( Fig. 2 View FIGURES 1 – 12 ). Antennae short, 0.50–0.76 times as long as body and 2.3–3.7 times as cephalic diagonal; ratio of length of ant. V to VI as 1.2–2.3; Ant. V and VI annulated except proximal part of ant. V ( Fig. 3 View FIGURES 1 – 12 ); apex of Ant. VI with 1–2 finger-like bent setae and without pin-like seta ( Fig. 4 View FIGURES 1 – 12 ). Dorsal cephalic chaetotaxy as in Fig. 5 View FIGURES 1 – 12 , A1 and Ps absent and S2 present, P group with 5 setae (after Mari Mutt 1979), 30–64 short ciliate setae present along posterior margin of head ( Fig. 5 and 6 View FIGURES 1 – 12 ). Labral setae 4/5,5,4, all smooth; distal margin of labrum with 4 broad, oval papillae, each papilla with 1 small seta ( Fig. 7 View FIGURES 1 – 12 ). External differentiated seta of labial appendage thinner than normal setae, short, with tip reaching basal half of papilla ( Fig. 8 View FIGURES 1 – 12 ). Apical seta of maxillary palp similar in shape and as long as or slightly longer than subapical seta ( Fig. 9 View FIGURES 1 – 12 ). Setae of posterior row of labial triangle variable, internal to setae with 0–5 ciliate setae and 2–6(9) smooth. Seta R of labial triangle 0.54–0.72 as long as M1 ( Fig. 10 View FIGURES 1 – 12 ).
Thorax. Macrochaetae as shown in Fig. 11 View FIGURES 1 – 12 (setae with an arrow sometimes absent). Trochanteral organ with 25–41 setae ( Fig. 12 View FIGURES 1 – 12 ). Besides numerous ciliate setae of different sizes, tibiotarsus with 0–2 smooth setae on outer side and 5–12 smooth setae arranged in 2–3 files on inner side. Tenent hair acuminate, 0.75–1.00 times as long as inner edge of unguis. Unguis with 3 inner teeth, basal pair small and sub-equal, median one minute. Unguicular outer tooth usually absent, rarely present (in paratype, female 8717-F) and minute ( Fig. 13 View FIGURES 13 – 22 ).
Abdomen. Macrochaetae and bothriotricha as shown in Fig. 11 View FIGURES 1 – 12 . Length ratio of abd. IV to abd. III at dorsal midline as 1.3–1.8. Tenaculum with 4+4 teeth and 4–10 weakly ciliate setae on corpus ( Fig. 14 View FIGURES 13 – 22 ). Ventral tube scaled on both faces, anterior face with 11–22 ciliate to weakly ciliate setae on each side ( Fig. 15 View FIGURES 13 – 22 ); posterior face with 36–78 weakly ciliate to smooth setae ( Fig. 16 View FIGURES 13 – 22 ); each lateral flap with 28–50 smooth setae ( Fig. 17 View FIGURES 13 – 22 ). Manubrium with numerous ciliate setae of different sizes, 23 and 25 smooth setae on each side (in paratype, female 8717-XXX) ( Fig. 18 View FIGURES 13 – 22 ). Manubrium plaque with 1–2 smooth setae, 9–13 strongly ciliate setae and 2–3 pseudopores ( Fig. 19 View FIGURES 13 – 22 ). Length ratio of manubrium to dens as 0.50–0.71. Proximal dens with 1–4 smooth setae. Dental lobe with a ciliate blunt seta and a row of 4–7 ciliate setae. Dental spines simple, 8–13, chestnut coloured, arranged in one file along inner edge of dentes ( Fig. 20 View FIGURES 13 – 22 ). Ratio of length of uncrenulatd part of dens to mucro 3.1–4.3. Mucro bidentate, basal spine short, smooth, with tip reaching subapical tooth ( Fig. 21 View FIGURES 13 – 22 ).
Scales chestnut coloured, hyaline and heavily striated ( Fig. 22 View FIGURES 13 – 22 ).
Ecology. In leaf litter of deciduous trees.
Type material. Holotype female, China: Guangdong Province: Guangzhou: South China Plantation, 10.viii.1999, coll. Chen Jian-xiu and Wang Song-jie, collection number 8717-C; paratypes: 3 males and 53 females on slides, same data as holotype (8717-series); in the Department of Biology, Nanjing University.
Etymology. The new species is named after Mr. Wang Song-jie who collected the specimens for the present study.
Remarks. The new species is clearly different from D. indicus , the only known Chinese species in the genus, by the characters given in Table 1 View TABLE 1 .
The new species is most similar in the arrangement of dental spines to the Philippine species D. luzonensis Mari Mutt, 1985 and the Singapore species D. simplex Yosii, 1959 , but differs from them as shown in Table 2.
TABLE 2. The main differences between D. wangi , D. luzonensis and D. simplex .
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.