Heptacanthella yinae, Gao & Potapov & Bu, 2022

Gao, Yan, Potapov, Mikhail & Bu, Yun, 2022, A new blind genus of Anurophorinae (Collembola: Isotomidae) with seven anal spines from Northwest China, Zootaxa 5104 (1), pp. 80-88 : 82-86

publication ID	https://doi.org/ 10.11646/zootaxa.5104.1.4
publication LSID	lsid:zoobank.org:pub:2A1CF95E-B7DF-47E4-9F8B-37ABEA6A05F7
DOI	https://doi.org/10.5281/zenodo.6316717
persistent identifier	https://treatment.plazi.org/id/F91B87CA-FF98-FF9A-BFA3-C584F7943D22
treatment provided by	Plazi
scientific name	Heptacanthella yinae
status	sp. nov.

Treatment

Heptacanthella yinae View in CoL sp. nov.

Figures 1–21 View FIGURES 1–10 View FIGURES 11–14 View FIGURES 15–23

Material examined. Holotype: female (slide No. XJ-C2016086 ) ( SNHM), Northwest China, Xinjiang Province, Bole city, Hariturege Park , 45°08’N 81°46’E, 1125 m alt., soil samples from the forest of Populus euphratica , 31- VIII-2016, collected by Cheng-Wang Huang. GoogleMaps Paratypes: 10 females (slide Nos. XJ-C2016085 , XJ-C2016087 , XJ- C2016094, XJ-C2016099 – XJ-C2016101 ) , 8 males (slide Nos. XJ-C2016088 – XJ-C2016093 , XJ-C2016102 , XJ- C2016103), same data as holotype GoogleMaps . Non-type specimens: 1 juvenile (Slide No. XJ-C2016104 ), same data as holotype GoogleMaps . Holotype and most paratypes are deposited in Shanghai Natural History Museum ( SNHM), 1 female ( XJ-C2016099 ) and 1 male ( XJ-C2016103 ) paratypes are deposited in Shanghai Entomological Museum ( SEM), 1 female (XJ- C2016085) and 1 male ( XJ-C2016093 ) paratypes are deposited in Moscow State Pedagogical University ( MSPU) .

Description. Body slender ( Fig. 1 View FIGURES 1–10 ), females 1.15 mm long on average (1.1–1.2 mm, n=11), males 0.93 mm (0.86–1.0 mm, n=8), holotype 1.12 mm. Pigmentation and eyes absent ( Fig. 2 View FIGURES 1–10 ). Cuticle reticulated ( Figs 10 View FIGURES 1–10 , 16 View FIGURES 15–23 ). PAO extremely narrow, weakly constricted medially ( Figs 2, 10 View FIGURES 1–10 ), 33–40 μm long and 3–4 μm wide, 1.5–1.6 times as long as claw 3 (20–26 μm). Head with short dorsal setae, a0 seta 10–11 μm long ( Fig. 2 View FIGURES 1–10 ). Labral formula as 4/554. Labium with complete set of components. Ventral side of head as shown in Fig. 3 View FIGURES 1–10 . Inner mouth parts heavily sclerotised.

Antenna (160–185 μm) slightly shorter than head (175–200 μm). Ant. I with 11 setae, 2 ventral s (longer one 7–10 μm and shorter one 4–5 μm), 1 dorsal and 1 ventral bms (3 μm) ( Figs 4 View FIGURES 1–10 , 12 View FIGURES 11–14 ). Ant. II with 15–16 setae, 3 bms (4 μm) and 1 curved medial lateral s (7–10 μm) ( Figs 4 View FIGURES 1–10 , 12 View FIGURES 11–14 ). Ant. III with 21–22 setae, 2 slender s (8–10 μm), 2 short s (3–4 μm), 1 slender lateral s (5–6 μm) and 1 dorsal bms ( Figs 5 View FIGURES 1–10 , 11 View FIGURES 11–14 ). Ant. IV with 7 thicker s-setae, 8 slender s-setae, 1 organit, 1 subapical micro s-seta, and numerous ordinary setae ( Figs 6, 7 View FIGURES 1–10 , 11 View FIGURES 11–14 ). Length ratio of antennal segments as 1: 1.7–2.0: 1.5–1.6: 2.6–2.8.

Ordinary setae and s-setae on body well differentiated ( Figs 13–21 View FIGURES 11–14 View FIGURES 15–23 ). Tergal s-setae on Th. II–Abd. IV distinctly shorter than ordinary setae ( Figs 14 View FIGURES 11–14 , 15–19 View FIGURES 15–23 ). S-setae thin and short. S- and ms-setae formula 33/22224 (s), 10/001 (ms) ( Figs 14–21 View FIGURES 11–14 View FIGURES 15–23 ). Thorax: Th. II and III each with 1 dorsal medial s and 2 anterolateral s, 6–8 μm, and 1 ms (4–5 μm) present on Th. II only ( Figs 14–17 View FIGURES 11–14 View FIGURES 15–23 ). Abdomen: Abd. I–IV each with 1 dorsal medial s (8–11 μm) and lateral s (6–9 μm), and 1 ms (5–6 μm) present on Abd. III ( Figs 14 View FIGURES 11–14 , 18, 19, 21 View FIGURES 15–23 ). Abd. V with two slender and long medial s-setae (10–12 μm) and two rod-like lateral s-setae (8–10 μm) ( Figs 13, 14 View FIGURES 11–14 , 24, 26 View FIGURES 24–27 ). Macrochaetotaxy 1, 1 / 2, 2, 3, 3 ( Figs 14–15, 18–19 View FIGURES 11–14 View FIGURES 15–23 ). Macrosetae 50–70 μm long. Axial setae on Th. II–Abd. IV as 10(12), 8 / 6, 6, 6, 8 ( Figs 14–15, 18–19 View FIGURES 11–14 View FIGURES 15–23 ). Ml macroseta (55–70 μm) on Th. II 3.3–4.0 times as long as p1 seta (17–21 μm) ( Fig. 16 View FIGURES 15–23 ). Sterna of Th. I–III without setae.

Ventral tube with 3+3 laterodistal and 4 posterior setae in one transversal row ( Fig. 8 View FIGURES 1–10 ). Claw of normal shape ( Fig. 9 View FIGURES 1–10 ), 20–25 μm long, without inner and lateral teeth. Unguiculus simple, without lamella, 7–10 μm long, 0.3–0.5 as long as claw 3 ( Fig. 9 View FIGURES 1–10 ). Tibiotarsus I–III with 21, 21, 22 setae respectively, without additional setae. Tibiotarsus without clavate tenent setae ( Fig. 9 View FIGURES 1–10 ). Furca and tenaculum completely absent. Retinacular field without setae ( Fig. 22 View FIGURES 15–23 ). Furcal subcoxa with 6+6 or 6+7 setae, including two macrosetae (45–50 μm) in medio-lateral position ( Fig. 23 View FIGURES 15–23 ). Manubrial field with 5–6 setae ( Fig. 23 View FIGURES 15–23 ). Abd. V with 4 short spines (p1 and p2) arranged in one transverse row, equal in length, 15–18 μm ( Figs 13–14 View FIGURES 11–14 , 20 View FIGURES 15–23 ). Abd. VI with 3 strongly chitinised, robust spines (m0 and m1), middle spine (35–38 μm) longer than 2 lateral ones (25–30 μm) ( Figs 13–14 View FIGURES 11–14 , 20 View FIGURES 15–23 ). All spines set on large papillae.

Female genital plate with 3 pairs of circumgenital setae and 2+2 sensilliform eugenital setae ( Figs 24, 25 View FIGURES 24–27 ). Male genital plate of juvenile specimens with 9–13 minute circumgenital setae ( Figs 26, 27 View FIGURES 24–27 ).

Etymology. The new species is dedicated to Professor Wenying Yin for her contribution to the knowledge of soil fauna from China, and to express our great gratitude for her instructions.

Distribution. Known only from the type locality in Xinjiang province (NW China) ( Fig. 28 View FIGURE 28 ).