Hypogastrura manghe, Jia, Junli, Skarżyński, Dariusz & Konikiewicz, Marta, 2011

Jia, Junli, Skarżyński, Dariusz & Konikiewicz, Marta, 2011, A taxonomic study on Hypogastrura Bourlet, 1839 (Collembola, Hypogastruridae) from China, Zootaxa 2981, pp. 56-62 : 57

Hypogastrura manghe sp. nov.

Figs 1–11

Type material. Holotype female on slide, litter under Quercus variabilis Blume, Mang He Nature Reserve, 900m a. s. l., Taihang Mountains, Jincheng City, Shanxi Province, China, 22.ix.2010, leg. Junli Jia & ChenJun Wang. Paratypes: 5 females and 3 males on slides, 18 specimens in alcohol, same data as holotype. Holotype and 22 paratypes deposited in the collection of the College of Life Science, Shanxi Normal University, Linfen, Shanxi, China, 5 paratypes deposited in the collection of the Department of Biodiversity and Evolutionary Taxonomy, Wrocław University, Poland.

Etymology. The new species is named after Manghe river.

Description. Body length up to 2.2 mm. Body color dark brown in live specimens, grey or grey-black with irregular brown-yellow stripe in alcohol, ventrally yellow. Granulation fine and uniform, 8–10 granules between setae p1 on abd. V. Head with slightly protruding tegumentary humps between setae d2, sd1 and oc2

Dorsal chaetotaxy of thorax and abdomen as in Figs 1, 2 . Chaetotaxy of head typical of the genus. Body setae moderately long, sometimes slightly serrated. Differentiation in micro- and macrochaetae poor. Body sensilla (s) about two times longer than microchaetae, smooth. Th. I with 3 + 3 setae. Th. II with setae m2, m3-4, m6 and additional m2’. Th. III with setae m3, m4, m6 and additional setae in position m2’ or m3’. Abd. I–III with additional setae a3 and p3’. Abd. IV with setae p3, p7 and some supernumerary ones. Subcoxa I–III with 1, 2, 3 setae respectively.

Ant. IV with trilobed apical vesicle, subapical organite, microsensillum, 9–11 cylindrical curved sensilla (3 lateral and 6–8 dorsal) and about 30–45 ventroapical modified sensilla. These are broadened and flattened at tips ( Figs 6, 7 ). Ant. III-organ with two long (lateral) and two short (internal) curved sensilla ( Fig. 6 ). Microsensillum on ant. III present ( Fig. 7 ). Ant. I with 7 setae.

Ocelli 8 + 8. Postantennal organ with 4 lobes, size subequal to nearest ocellus, accessory tubercle absent ( Fig. 9 ).

Labrum without apical papillae. Labral setae 5, 5, 4, prelabrals 4. Head of maxilla with lamellae 1, 2, 4 and 5 distinctly longer than maxillary teeth. Lamellae 1 and 4 with long marginal filaments and denticles, lamellae 2 and 5 with marginal filaments only ( Fig. 10 ). Maxillary outer lobe with 1 sublobal hair. Labial palp typical of the genus with some guard setae (especially b3-4 and d4) broadened at the tips ( Fig. 11 ).

Tibiotarsi I, II, III with 19, 19, 18 setae respectively, without distinctly differentiated tenent hair. Claws with inner tooth and two pars of lateral teeth. Empodial appendage with broad basal lamella and apical filament reaching inner tooth or slightly beyond.

Ventral tube with 4 + 4 setae. Retinaculum with 4 + 4 teeth.

Furca well developed ( Fig. 5 ). Dens with fine and uniform granulation and 6 setae. Mucro narrow, bent inwards with low outer lamella. Granulated basal part displaced inwards, its distal margin forms small sharp processus. Ventroapical part of dens and ventrobasal part of mucro with strong cuticular plates ( Figs 3, 4 ). Ratio dens: mucro 2.2–2.6: 1.

Anal spines short set on high basal papillae ( Fig. 2 ).

Remarks. H. manghe sp. nov. is a member of the H. trybomi group, since it has a labrum without distal papillae, empodial appendages with broad basal lamella, and setae m6 on th. II–III present. The new species having prolonged maxillary lamellae and 6 setae on the dens resembles H. hexasetata from China (2 paratypes were studied: Hubei Province, Xianfeng County, Laoliba village, 1000 m a.s.l, 23 September 1997, collector unknown, deposited at the collection of the Institute of Plant Physiology and Ecology, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences), but it clearly differs in the shape of the apical vesicle on ant. IV (in H. manghe sp. nov. trilobed; in H. hexasetata simple), the shape of the sensilla in the ventral file on ant. IV (in H. manghe sp. nov. broadened and flattened at tips; in H. hexasetata pointed), and the degree of plurichaetosis (in H. manghe sp. nov. setae m2' on th. II and p3 on abd. I–III present, in H. hexasetata absent).

Figures

FIGURES 1 – 5. H. manghe sp. nov.: 1, chaetotaxy of th. II; 2, chaetotaxy of abd. III – VI; 3, mucro and apical part of dens, dorsal view; 4, mucro and apical part of dens, ventral view; 5, dens and mucro. Abbreviations in text.

FIGURES 6 – 11. H. manghe sp. nov.: 6, chaetotaxy of ant. III – IV, dorsal side; 7, chaetotaxy of ant. III – IV, ventral side; 8, claw III with empodial appendage; 9, postantennal organ and ocelli; 10, head of maxilla; 11, labium. Abbreviations in text.