Multivesicula zhengi, Gao & Bu, 2022

Gao, Yan & Bu, Yun, 2022, New species and records of Tullbergiidae (Collembola, Poduromorpha) from Xinjiang province, Northwest China, Zootaxa 5092 (5), pp. 531-544 : 532-536

publication ID	https://doi.org/ 10.11646/zootaxa.5092.5.2
publication LSID	lsid:zoobank.org:pub:4B4DF344-36C2-46C7-80AE-6F6B54DE0FEE
DOI	https://doi.org/10.5281/zenodo.5896431
persistent identifier	https://treatment.plazi.org/id/03A88104-FFA3-7B51-A59C-FAFEF4C5AEBD
treatment provided by	Plazi
scientific name	Multivesicula zhengi
status	sp. nov.

Treatment

Multivesicula zhengi View in CoL sp. nov.

Figures 1–19 View FIGURES 1–10 View FIGURES 11–15 View FIGURES 16–19 , Tables 1 View TABLE 1 , 2 View TABLE 2

Material examined. Holotype: female, (slide No. XJ-2016081-3), Northwest China, Xinjiang Province, Urumuchi City, Baiyanggou , 43°25’ N 87°09’E, elev. 2000 m, soil samples from coniferous forest, 4-IX-2016, C.W. Huang coll. GoogleMaps Paratypes: 5 females (slides Nos. XJ-2016068, XJ-2016077-2, XJ-2016077-3, XJ-2016077-4, XJ-2016077- 5), same data as holotype. All type specimens are deposited in Shanghai Natural History Museum ( SNHM) GoogleMaps .

Diagnosis. Postantennal organ composed of 48–52 vesicles arranged in 4 irregular rows; pseudocelli formula of 11/122/11111: with one pair on Th. I and two pairs on each of Th. II and III; seta px on Abd. IV present, setae a2 and a4 on Abd. V as macrosetae; sensillum p3 on Abd. V weakly differentiated.

Description. Adult body 0.59 mm long on average (0.56–0.66 mm, n = 6), holotype 0.56 mm. Dorsal setae well differentiated into micro- and macrosetae ( Figs 1, 7–10 View FIGURES 1–10 ). Granulations on body coarse. Pso formula as 11/122/11111 from head to abdomen, 7–8 μm in diameter, type I ( Figs 4 View FIGURES 1–10 , 18 View FIGURES 16–19 ). On Th. I pso set behind seta m2, close to hind margin ( Fig. 6 View FIGURES 1–10 ). Th. II and III each with two pairs of pso, subdorsal one between setae p3/p4, close to p3, lateral one posterior to seta m5 ( Figs 6–7 View FIGURES 1–10 ); pso on Abd. I–IV posterior to seta p3 ( Figs 8–11 View FIGURES 1–10 View FIGURES 11–15 ), on Abd. V between the borders of Abd. V and VI ( Fig. 12 View FIGURES 11–15 ).

Cephalic seta a0 and sd5 as mesosetae, 10–11 μm, c1 absent, oc2 as macroseta, 14–15 μm long ( Fig. 2 View FIGURES 1–10 ). Postantennal organ ellipse shaped, 15–16 μm long and 6–7 μm wide, composed of 48–52 round vesicles irregularly arranged in four rows, 48 on holotype ( Figs 4 View FIGURES 1–10 , 18 View FIGURES 16–19 ). Labrum with 4/5/4 setae. Labium with 5 papilla, 6 apical guard setae, 6 proximal setae, 4 basomedian setae, and 5 basolateral setae ( Fig. 3 View FIGURES 1–10 ).

Antenna (70–80 μm) shorter than head (90–100 μm), 70 μm in holotype. Antennal segment IV with five thickened sensilla a–e, without basal heel; sensilla a, c, e long and curved toward inner side, b straight and short, d small and short, curved toward inner side ( Fig. 16 View FIGURES 16–19 ). Small microsensillum, subapical organite and one apical vesicle present ( Fig. 16 View FIGURES 16–19 ). Antennal organ III ( Fig. 16 View FIGURES 16–19 ) consists of two small sensory rods concealed behind one large papilla and two thick sensory clubs bent toward each other, with four guard setae; one large ventral sensory club present ( Fig. 17 View FIGURES 16–19 ).

Legs short, without clavate tibiotarsal hairs ( Fig. 19 View FIGURES 16–19 ). Coxa, trochanter, femur and tibiotarsus with 3/7/7; 6/6/5; 10/10/10; 15/15/14 setae on leg I, II and III respectively. Claw 10 μm long ( Fig. 19 View FIGURES 16–19 ), with short empodial appendage (3–4 μm). Anal lobes with seta 12' and l3' ( Fig. 15 View FIGURES 11–15 ). Anal spines short, 10 μm long ( Fig. 12 View FIGURES 11–15 ).

Adult chaetotaxy given in Figs 6–15 View FIGURES 1–10 View FIGURES 11–15 and Table 1 View TABLE 1 . Microsensilla present on Th. II–III, lateral sensilla thick, 17–19 μm long ( Figs 6–7 View FIGURES 1–10 ). Thorax with 0, 2, 2 ventral setae. Abd. I–III with 2+2 axial setae each segment, with setae m3 and m4 present ( Figs 8–10 View FIGURES 1–10 ). Abd. IV with setae m4 and px present, p1 as macrosetae (13–15 μm), p2 as microseta (8–10 μm) ( Fig. 11 View FIGURES 11–15 ). Abdominal segment V ( Fig. 12 View FIGURES 11–15 ) with sensillum p3 slightly differentiated, 10–14 μm in length; seta a2 (20–22 μm) and a4 as macroseta (22–25 μm). Crescentic ridges on abdominal segment VI present ( Fig. 12 View FIGURES 11–15 ).

Ventral tube with 4+4 apical setae and 2+2 basal setae ( Fig. 5 View FIGURES 1–10 ). Abd. II, III and IV with 20, 22, and 26 ventral setae respectively ( Figs 13–14 View FIGURES 11–15 ). Female genital plate with 6+6 pregenital setae, 3 circumgenital setae, one pair of eugenital setae and 2 pairs of post-genital setae ( Fig. 15 View FIGURES 11–15 ).

Distribution. China (Xinjiang), only known from the type locality.

Etymology. We dedicate this new species in honor of the late Professor Zhemin ZHENG (1932–2021) who was a well-known orthopterist for his great contribution to the knowledge of Chinese grasshoppers.

Remarks. The genus Multivesicula contains six species in the world: M. columbia Rusek, 1982 , M. punctata Rusek, 1982 and M. dolomitica Rusek, 1982 described from Canada, M. giljarovi Rusek, 1982 from Russia, M. ampla Christiansen & Bellinger, 1980 from USA and M. aliciae ( Palacios-Vargas & Díaz, 1996) from Mexico ( Bellinger et al. 1996 –2021). Multivesicula zhengi sp. nov. can be easily distinguished from all above known species by the presence of one pair of pso on Th. I and two pairs of pso on Th. II, pso formula as 11/122/11111, the presence of seta m3 on Th. II and III and seta a2 on Abd. V, and the weakly differentiated sensillum p3 on Abd. V. The differences between all seven species in the genus are given in Table 2 View TABLE 2 .