Sinella yui, Zhang, Feng, 2013
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publication ID |
https://doi.org/ 10.11646/zootaxa.3736.5.7 |
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publication LSID |
lsid:zoobank.org:pub:794ABCB3-FC0A-4C51-B0CC-7B627E64C90E |
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DOI |
https://doi.org/10.5281/zenodo.5669984 |
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persistent identifier |
https://treatment.plazi.org/id/617E87F9-FFF8-C46B-FF2D-1666FE0164A5 |
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treatment provided by |
Plazi |
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scientific name |
Sinella yui |
| status |
sp. nov. |
Sinella yui sp. nov.
Figs 2 View FIGURES 1 – 5 , 20–33 View FIGURES 20 – 29 View FIGURES 30 – 33
Types. Holotype: male on slide, China: Zhejiang: Qinyuan: Baishanzu town, 27°44’21.82’’N, 119°10’43.42’’E, 21.v.2011, F. Zhang and D.- Y. Yu leg. (sample number C9659). Paratypes: 1 female on slide, same data as holotype.
Description. Body length up to 1.48 mm. Body yellow white ( Fig. 2 View FIGURES 1 – 5 ).
Antenna 2.5 times as long as cephalic diagonal. Antennal segments ratio as I: II: III: IV = 1: 1.4: 1. 9: 3.0. Long smooth straight chaetae ventral, 1 and 2 on Ant.I and II respectively. Two internal S of Ant.III organ rod-like.
Omma 3+3, anterior two and posterior one separate. Papilla E with 4 guard chaetae; lateral process of labial palp much thicker than normal chaetae ( Fig. 20 View FIGURES 20 – 29 ). Labial chaeta R ciliate and others smooth, R/M=0.45; chaetae X, X2 and X4 ciliate. Cephalic groove with 8 chaetae, 4 of them smooth ( Fig. 22 View FIGURES 20 – 29 ). Dorsal cephalic chaetotaxy with 3 median (M) mac ( Fig. 23 View FIGURES 20 – 29 ). Clypeal chaetae smooth but their number and arrangement not clearly seen.
Trochanteral organ with about 16 smooth spiny chaetae; 11 in arms and 5 between them ( Fig. 24 View FIGURES 20 – 29 ). Inner differentiated tibiotarsal chaetae ciliate with ciliations not closely appressed to axis. Unguiculus outer edge smooth. Tenent hairs pointed, subequal to unguiculus in length ( Fig. 25 View FIGURES 20 – 29 ). Abd.IV 4.0 times as Abd.III in length along dorsal midline. Ventral tube anteriorly with 6 ciliate chaetae on each side and 2 of them much larger ( Fig. 26 View FIGURES 20 – 29 ); posteriorly with about 12 smooth chaetae ( Fig. 27 View FIGURES 20 – 29 ); each lateral flap with 7 smooth chaetae. Manubrium without smooth straight chaetae, most distal part with 5+5 anterior and 4+4 posterior ciliate chaetae in a row. Manubrial plaque with 3 pseudopores and 3 ciliate chaetae ( Fig. 28 View FIGURES 20 – 29 ). Distal smooth part of dens subequal to mucro in length. Mucronal basal spine long with tip reaching the middle between two teeth; apical tooth longer than subapical one ( Fig. 29 View FIGURES 20 – 29 ).
Th.II with 3 medio-medial (m1, m2, m 2i), 3 medio-lateral (m4, m 4i, m4p) and 21–22 posterior mac; p5 as mac. Th.III with 31 mac ( Fig. 30 View FIGURES 30 – 33 ). Abd.I with 6 (m2–4, a3, m 2i, m4p) mac. Abd.II with 4 (a2, m3, m3e, m3ep) central and 1 (m5) lateral mac. Abd.III with 1 (m3) central and 3 (am6, pm6, p6) lateral mac; ms absent ( Fig. 31 View FIGURES 30 – 33 ). Abd.IV with 7 central (I, M, A4, A6, B4–6), 6 lateral mac (D3, F1, E2–4, E2p); most s-chaetae much longer than those on anterior terga but their number not clearly seen ( Fig. 32 View FIGURES 30 – 33 ). Abd.V with 3 s-chaetae ( Fig. 33 View FIGURES 30 – 33 ).
Ecology. Under bricks and moss.
Etymology. Named after Mr. Yu who helped to collect the animals.
Remarks. This new species is similar to 3+3 eyed S. pseudostraminea Stach, 1965 from Vietnam, S. straminea Folsom, 1899 and S. triocula Chen & Christiansen, 1993 from China. It differs from S. pseudostraminea in less spiny chaetae on trochanteral organ, chaetotaxy of Abd.II and IV, and larger apical tooth on mucro. It differs from the latter two Chinese species in smooth outer edge on unguiculus, long mucronal basal spine, pointed tenent hairs, and tergal chaetotaxy.
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