Entomobrya polychaeta, Ma & Shi, 2018
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publication ID |
https://doi.org/ 10.5852/ejt.2018.419 |
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DOI |
https://doi.org/10.5281/zenodo.5672091 |
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persistent identifier |
https://treatment.plazi.org/id/343F87A7-FFBE-5E36-EF7B-FD36FBC25BB6 |
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treatment provided by |
Plazi |
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scientific name |
Entomobrya polychaeta |
| status |
sp. nov. |
Entomobrya polychaeta View in CoL sp. nov.
urn:lsid:zoobank.org:act:B53D28DE-4033-467F-9077-60C916C12AF7
Figs 6–10 View Fig. 6 View Fig.7 View Fig. 8 View Fig. 9 View Fig. 10 , Table 2 View Table2
Diagnosis
Three pairs of interrupted, longitudinal dark blue stripes present from Th. II to Abd. III; 7–9 mediomedial and 6–8 medio-sublateral mac on Th. II; 4 central and 8 lateral mac on Abd. III.
Etymology
The specific epithet is derived from the Latin ‘ poly ’, meaning ‘many’, referring to the many mac on the lateral side of Abd. III.
Type material
Holotype
CHINA: ♀ on slide, 108 National Highway, Mazhao Town , Zhouzhi County, Xi’an City, Shaanxi Province, 34°03′35″ N, 108°11′47″ E, altitude ca 566 m, in litter, with aspirator, 15 Jul. 2012, Yitong Ma leg. ( Nantong University, collection number 1115 ). GoogleMaps
Paratypes
CHINA: 2 ♀♀ on slides, same collecting data as for holotype. GoogleMaps
Description
MEASUREMENTS. Body length up to 2.24 mm.
COLOUR. Ground colour pale yellow. Middle and distal parts of Ant. I–III blue pigmented and pigment also present on Ant. IV. An irregular dark blue circle present along margin of head. Besides a transverse dark stripe present between eyepatches, some dark patches present on middle and posterior part of head. A pair of longitudinal stripes present laterally from anterior part of Th. II to Abd. IV. There are also two pairs of discontinuous longitudinal stripes from posterior part of Th. II to Abd. III: one is located centrally and other medio-laterally. Posterior margin of Abd. III with a narrow transverse blue stripe. Abd. IV with longitudinal median stripes and irregular patches. Coxae, distal part of femora and middle part of tibiotarsi with blue pigment ( Fig. 6A–C View Fig. 6 ).
HEAD. Antenna 0.58–0.68 times as long as body. Antennal segments ratio as I: II: III: IV = 1.00:1.56– 1.85: 1.32–1.74: 1.85–2.12. Distal part of Ant. IV with many sensory chaetae, normal ciliate chaetae and apical bulb unilobed ( Fig. 7A View Fig.7 ). Lateral process (l.p.) of labial palp curved with tip reaching apex of same papilla ( Fig. 7B View Fig.7 ). Subapical chaeta of maxillary outer lobe subequal to apical one, 3 smooth hairs on sublobal plate ( Fig. 7C View Fig.7 ). Labial chaetae MREL1L2, all ciliate; chaeta R 0.67–0.70 as long as chaeta M ( Fig. 7D View Fig.7 ). Labral chaetae 4/5, 5, 4, prelabral chaetae ciliate and other smooth; labral papillae 4 and each with 1 minute denticle ( Fig. 7E View Fig.7 ). Clypeus not clearly seen. Dorsal cephalic chaetotaxy with 4 antennal (An), 4 median (M), 8 sutural (S) mac and 6–7 mac in Gr. II; interocular chaetae as p, s, t ( Fig. 7F View Fig.7 ).
THORAX. Th. II with 7–9 medio-medial, 6–8 medio-sublateral, 33–35 posterior mac, 1 ms and 2 sens. Th. III with 42–43 mac and 2 sens ( Fig. 8A View Fig. 8 ). Coxal macrochaetal formula as 3 (2 pseudopores)/ 4+2, 3 (4 pseudopores) /4+2 (2 pseudopores) ( Fig. 8B–D View Fig. 8 ). Trochanteral organ with 28–33 chaetae ( Fig. 8E View Fig. 8 ). Tenent hair subequal to inner side of unguis, with tip strongly clavate. Unguis with 4 inner teeth, basal pair located 0.47̅0.49 distance from base of inner edge of unguis, distal unpaired two respectively at 0.71̅0.73 and 0.88̅0.89 distance from base. Unguiculus acuminate with outer edge serrate ( Fig. 8F View Fig. 8 ).
ABDOMEN. Abd. IV 5.02–6.11 times as Abd. III in length along dorsal midline. Abd. I with 12(11) (m 2i, m2, m3, m4, m 4i, m4p, a1, a1a, a2, a3, a5, m 4i sometimes absent) mac, 1 ms and 1 sens; sens inner to ms. Abd. II with 7(8) (a2, a3, m3e, m3ea, m 3ei, m3ep, m3, an unknown mac sometimes present between m3e and m3ep) central, 1 (m5) lateral mac and two sens. Abd. III with 4 (a2, a3, a3a, m3) central, 8(6 or 7) (am6, pm6, m7a, m7, p6, p7, 2 unknown) lateral mac, 1 ms and 2 sens ( Fig. 9A View Fig. 9 ). Abd. IV with 48̅58 central and 26̅29 lateral mac ( Fig. 9B View Fig. 9 ). Abd. V with 3 sens ( Fig. 9C View Fig. 9 ). Ventral tube with 39 ciliate chaetae on anterior face (in 1 individual) ( Fig. 10A View Fig. 10 ), posterior face not clearly seen, 5 smooth and 11̅17 ciliate chaetae on each lateral flap ( Fig. 10B View Fig. 10 ). Manubrial plaque with 7 ciliate chaetae and 3 pseudopores on each side in 2 individuals ( Fig. 10C View Fig. 10 ). Distal smooth part of dens about 1.48–1.56 times as long as mucro. Mucro bidentate and subapical tooth equal to apical tooth. Basal spine almost reaching apex of subapical tooth ( Fig. 10D View Fig. 10 ).
Remarks
The new species is characterised by its three pairs of longitudinal dark blue stripes present from Th. II to Abd. III, 7–9 medio-medial and 6–8 medio-lateral mac on Th. II, usually 8 lateral mac on Abd. III. It is most similar to the Korean species E. koreana Yosii, 1965 and the Chinese E. retingensis Baquero & Jordana, 2008 in colour pattern, but the differences between them are great, such as chaetotaxy on Th. II and Abd. III and the ratio of the smooth part of the dens to the mucro ( Table 2 View Table2 ).
Table2. Comparison amongEntomobryapolychaetasp.nov., E.koreanaYosii,1965and E.retingensis Baquero & Jordana, 2008.
| Characters | E. polychaeta sp. nov. | E. koreana | E. retingensis |
|---|---|---|---|
| Blue longitudinal stripes from Th. II to Abd. III | 6 stripes | 5 stripes | no longitudinal stripes |
| Medio-medial mac on Th. II | 7–9 | 2 | 0 |
| Medio-lateral mac on Th. II | 6–8 | 4 | 2 |
| Central mac on Abd. III | 4 | 3 | 3 |
| Lateral mac on Abd. III | 8 | 4 | 3 |
| Length ratio of smooth part of dens to mucro | 1.5–1.6 | 2.3 | 2.4 |
| Locality | China (Shaanxi) | Korea | China (Tibet) |
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.
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