Three new species of Entomobrya (Collembola: Entomobryidae) from China Author Yitong Ma Author Shidi Shi text European Journal of Taxonomy 2018 2018-03-27 419 1 21 journal article 30363 10.5852/ejt.2018.419 2f8b8e31-ab43-4705-a9c3-c48851b3f61e 1211301 Entomobrya leviseta sp. nov urn:lsid:zoobank.org:act:5FE7323A-E49C-40D9-9576-6B82E3D4D355 Figs 1–5 , Table 1 Diagnosis Eyepatches and lateral margin of Th. II with blue pigment; a longitudinal blue stripe present along midline from head to Th. II, Th. III with a broad transverse blue stripe; Abd. IV with two irregular transverse blue stripes; prelabral chaetae of labrum smooth; subapical tooth of mucro equal to or slightly larger than apical tooth. Etymology The specific epithet is named after the smooth (from Latin ‘ levis ’) prelabral chaetae of the labrum. Table 1. Comparison between Entomobrya leviseta sp. nov and E. striatella Börner, 1909 .
Characters E. leviseta sp. nov. E. striatella
Labial chaetae Transverse stripe on Th. III MREL1L2 broad M1M2REL1L2 narrow
Colour pattern on Abd. IV anteriorly a transverse stripe a pair of patches
Colour pattern on Abd. V a transverse stripe a pair of patches
Mac m2i2 on Th. II present absent
Mac a1a on Abd. I present absent
Central mac on Abd. IV 33̅46 24
Locality China (Shaanxi) Japan, Korea
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 ). Fig. 1. Entomobrya leviseta sp. nov. A–B . Habitus. Scales bars: A–B = 500 μm. Paratypes CHINA : 2 ♀♀ on slides, same collecting data as for holotype ; 5 ♀♀ on slides, Famen Temple , Fufeng County , Baoji City , Shaanxi Province , 34°25′29″ N , 107°53′59″ E , altitude ca 602 m , in litter , with aspirator , 11 Jul. 2012 , Yitong Ma leg. ( Nantong University , collection number 1101 ). Description MEASUREMENTS. Body length up to 2.68 mm . COLOUR. Ground colour yellowish. Eyepatches dark blue. Antennae and lateral margin of head and Th. II with blue pigment. A longitudinal blue stripe present along midline from head to Th. II. Th. III with a broad transverse blue stripe. Abd. II with scattered pigment laterally and Abd. III with a very narrow blue stripe posteriorly.Abd. IV with two irregular transverse blue stripes. Coxae and tibiotarsi with weak pigment ( Fig. 1A–B ). Fig. 2. Entomobrya leviseta sp. nov. A . Apex of Ant. IV. B . Lateral process of labial palp. C . Maxillary outer lobe. D . Labium. E . Labrum. F . Dorsal chaetotaxy of head. Scale bars: D, F = 50 μm; A–C, E = 20 μm. HEAD. Antenna 0.47–0.63 times as long as body. Antennal segments ratio as I: II: III: IV = 1.00:1.28– 1.72: 1.28–1.65: 1.84–2.57. Distal part of Ant. IV with many sensory chaetae, normal ciliate chaetae and apical bulb bilobed ( Fig. 2A ). Lateral process (l.p.) of labial palp curved with tip not reaching apex of same papilla ( Fig. 2B ). Subapical chaeta of maxillary outer lobe subequal to apical one, 3 smooth hairs on sublobal plate ( Fig. 2C ). Labial chaetae MREL1L2, all ciliate; chaeta R 0.56–0.63 times as long as chaeta M ( Fig. 2D ). Labral chaetae 4/5, 5, 4, all smooth; labral papillae 4 and each with 1 minute denticle ( Fig. 2E ). Clypeus not clearly seen. Dorsal cephalic chaetotaxy with 4 antennal (An), 4 median (M) and 8 sutural (S) mac, 7 mac in Gr. II, interocular chaetae as p, s, t ( Fig. 2F ). Fig. 3. Entomobrya leviseta sp. nov. A . Chaetotaxy of Th. II̅III. B . Coxal macrochaetal formula of fore leg. C . Coxal macrochaetal formula of middle leg. D . Coxal macrochaetal formula of hind leg. E . Trochanteral organ. F . Hind foot complex. Scale bars: A = 50 μm; B–F = 20 μm. Fig. 4. Entomobrya leviseta sp. nov. A . Chaetotaxy ofAbd. I̅III. B . Chaetotaxy ofAbd. IV. C . Chaetotaxy of Abd. V. Scale bars: A–C = 50 μm. THORAX. Th. II with 4 (m1, m2, m 2i , m 2i 2) medio-medial, 3 (m4, m 4i , m4p) medio-sublateral, 31–34 posterior mac, 1 ms and 2 sens. Th. III with 38–43 (46) mac and 2 sens ( Fig. 3A ). Coxal macrochaetal formula as 3 (2 pseudopores) / 4+1–2, 3 (5–6 pseudopores)/ 4+2 (2 pseudopores) ( Fig. 3B–D ). Trochanteral organ with 43–44 (61) chaetae ( Fig. 3E ). Tenent hair subequal to inner side of unguis, with tip strongly clavate. Unguis with 4 inner teeth, basal pair located 0.44̅0.49 distance from base of inner edge of unguis, distal unpaired two respectively at 0.68̅0.73 and 0.85̅0.87 distance from base. Unguiculus acuminate with outer edge serrate ( Fig. 3F ). ABDOMEN. Abd. IV 5.31–7.55 times as Abd. III in length along dorsal midline. Abd. I with 11(10) (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 6 (7) (a2, a3, m3e, m3ea, m3ep, m3, m 3ei sometimes present) central, 1 (m5) lateral mac and two sens. Abd. III with 3 (a2, a3, m3) central, 4 (am6, pm6, m7a, p6) lateral mac, 1 ms and 2 sens ( Fig. 4A ). Abd. IV with 33̅46 central and 20̅23 lateral mac ( Fig. 4B ). Abd. V with 3 sens ( Fig. 4C ). Ventral tube with 15–23 ciliate chaetae on anterior face ( Fig. 5A ), 2 apical smooth and many ciliate chaetae on posterior face ( Fig. 5B ), 6 smooth and 8̅13 ciliate chaetae on each lateral flap ( Fig. 5C ). Manubrial plaque with 8̅14 ciliate chaetae and 3 pseudopores on each side ( Fig. 5D ). Distal smooth part of dens about 1.00–1.28 times as long as mucro. Mucro bidentate and subapical tooth equal to or slightly larger than apical tooth. Basal spine almost reaching apex of subapical tooth ( Fig. 5E ). Fig. 5. Entomobrya leviseta sp. nov. A . Anterior face of ventral tube. B . Posterior face of ventral tube. C . Lateral flap of ventral tube. D . Plaque of manubrium. E . Distal part of dens and mucro. Scale bars: A–E = 20 μm. Remarks The prelabral chaetae on labrum are ciliated in Entomobrya generally ( Jordana 2012 ) or finely ciliate ( Katz et al. 2015 ), but they are smooth in E. striatella Börner, 1909 ( Jordana 2012 ; Yosii et al. 1963). The new species is the second species of Entomobrya with smooth prelabral chaetae and it is also similar to E. striatella in colour pattern on Th. II, with three longitudinal stripes, but the colour pattern on Th. III, Abd. IV̅V and chaetotaxy on Abd. I & IV are different ( Table 1 ).