Pacificampa wudonghuii Sendra, 2021

Sendra, Alberto, Komerički, Ana, Lips, Josiane, Luan, Yunxia, Selfa, Jesús & Jiménez-Valverde, Alberto, 2021, Asian cave-adapted diplurans, with the description of two new genera and four new species (Arthropoda, Hexapoda, Entognatha), European Journal of Taxonomy 731, pp. 1-46 : 24-28

Pacificampa wudonghuii Sendra sp. nov.

urn:lsid:zoobank.org:act:447EE93A-F466-4C66-827A-0751A259070F

Figs 51–64

Etymology

This species is dedicated to Professor Wu Donghui, from the Northeast Institute of Geography and Agroecology (NEIGAE), Chinese Academy of Sciences, Changchun ( China), for his enthusiastic contribution and support to the knowledge of Northern China soil and cave biodiversity.

Type material

Holotype

CHINA • ♀; Liaoning Province, Benxi, Huanren, Xianren Dong ; 17 May 2019, L. Deharveng, A. Bedos and Wu Donghui leg.; labelled “CHILN19-005-holotype”; NEIGA-diplura-01.

Paratypes

CHINA • 1 ♀, 1 juvenile, same collection data as for holotype; labelled “CHILN19-005-female paratype”; MZB ( MCNB) 2020-1160 • 1 juvenile; same collection data as for preceding; labelled “CHILN19- 005-juvenile paratype”; MZB ( MCNB) 2020-1161 • 1 ♀; Liaoning Province, Benxi, Huanren, Pylon cave ; 17 May 2019; L. Deharveng, A. Bedos and Wu Donghui leg.; labelled “CHILN19-007-female paratype”; MZB ( MCNB) 2020-1164 .

Other material examined

CHINA • 1 ♂, same collection data as for holotype; mounted on an aluminium stage and coated with palladium-gold; Coll. AS.

Description

BODY. Length 6.5–6.9 mm in females; 3.9 mm in one juvenile. Epicuticle smooth under optical microscope but well reticulated under high magnifications as one can see irregular polygonal structures of variable sizes with scattered external glands either visible or covered with secretion ( Figs 51, 53 ); body with smooth clothing setae.

HEAD. Antennae broken in all specimens; central antennomeres with two whorls of distal barbed macrosetae and uneven short setae; in addition, with single distal whorl of up to 8–12 gouge sensilla of 22–29 µm long ( Fig. 51 ) and among them one or two small coniform sensilla (5 µm long). Proximal antennomeres with typical trichobothria disposition with bacilliform sensillum (9–10 µm long) on third antennomere in ventral position, between c–d macrosetae ( Fig. 52 ). Plain frontal process with one anterior macrosetae, longer than clothing setae. Three macrosetae along each side of insertion line of antennomere and x setae with length ratios of a / i / p / x, 42/55/42/45, respectively, in holotype ( Fig. 54 ). Large suboval labial palps, each with enlarged coniform latero-external sensillum near two gard setae and eight normal setae on anterior portion, up to 150 neuroglandular setae in medial and posterior positions.

THORAX. Thoracic macrosetae distribution: pronotum has 1+1 ma, 1+1 la, 1+1 lp macrosetae; mesonotum has 1+1 ma, 1+1 la and 2+2 lp macrosetae; and metanotum has 1+1 ma and 1+1 lp macrosetae. Long macrosetae with long barbs in distal three-fourths; marginal setae longer than clothing setae, which are barbed from distal half to three-fourths. Legs elongated, metathoracic legs reach posterior border of seventh abdominal segment. Mesothoracic and metathoracic femora have one dorsal macroseta each, barbed along distal three-fourths ( Fig. 55 ), absent in prothoracic femora. Calcars with two or three long barbs in middle ( Fig. 56 ). Prothoracic and mesothoracic tibia with one short ventral macrosetae with one apical barb and two in metathoracic tibia ( Fig. 57 ). Each tarsus with two separated ventral rows of thicker and longer setae among clothing setae, and a few setiform sensilla ( Fig. 58 ). Three long smooth dorsal tarsal and one ventral setae. Subequal elbowed claws with smooth ventral surface ridged on dorsal side that can be mistaken for lateral crests under optical microscopes, between a blunt unguiculus and without lateral processes ( Figs 59–60 ).

ABDOMEN. Distribution of abdominal macrosetae on tergites ( Fig. 61 shows 1+1 ma on III in the paratype from Grotte du Pylone, but absent in Xianren Dong Cave types; 1+1 ma, 1+1 la and 2+2 lp on IV–VII; 1+1 mp and 3+3 lp on VIII and 1+1 mp and 5+5 lp on IX abdominal; ma and la macrosetae with barbs in distal half to one third and shorter than mp and lp macrosetae, which bear long barbs along distal four-fifths. Urosternite I with 7+7 macrosetae ( Fig. 62 ); urosternites II to VII with 4+4 macrosetae ( Fig. 63 ); urosternite VIII with 1+1 macrosetae ( Fig. 64 ); urosternal macrosetae of varying lengths, with one apical to twenty distal long barbs. Stylus setae smooth, apical and subapical setae shorter than ventromedial seta ( Fig. 63 ).

SECONDARY SEX CHARACTERS. Female urosternite I with subcylindrical appendages, each bearing up to 40 glandular a 1 setae in apical field. Male urosternite I with thick short, and subcylindrical appendages, each with large apical field of about 220 glandular a 1 setae ( Fig. 62 ).

Taxonomic affinities

Pacificampa wudonghuii sp. nov. shares with P. birsteini Chevrizov, 1978 , P. caesa Chevrizov, 1978 and P. nipponica Sendra, 2018 the same distribution of notal macrosetae (1+1 medial anterior, 1+1 lateral anterior, and 1+1 lateral posterior macrosetae on pronotum; 1+1 medial anterior, 1+1 lateral anterior, and 2+2 lateral posterior macrosetae on mesonotum; and 1+1 medial anterior and 1+1 lateral anterior macrosetae on metanotum). An undescribed species mentioned by Ferguson (1997) from northeastern China also has this setal distribution. However, P. wudonghuii sp. nov. differs from other species of Pacificampa in having 1+1 medial anterior, 1+1 lateral anterior, and 2+2 lateral posterior macrosetae on the fourth urotergite ( Fig. 61 ), a pattern distribution that begins on the fifth urotergite for the other species. In addition, the larger male appendages have more abundant glandular a 1 setae in P. wudonghuii sp. nov. ( Fig. 62 ) than in the other species of Pacificampa .

Figures

Figs 51‒54. Pacificampa wudonghuii Sendra sp. nov. 51. Gouge sensilla (gs) of antennomeres. 52. Sensillum of the third antennomeree (sIII). 53. Surface of the notum with external glands (eg). 54. Frontal process with anterior (a), intermediate (i) and posterior (p) macrosetae of the insertion line of antennae and x setae.

Figs 55‒60. Pacificampa wudonghuii Sendra sp. nov. 55. Dorsal macrosetae on the metathoracic femur. 56. Joint between tibia and tarsus with calcars. 57. Ventral macroseta on the tibia. 58. Lateral side of the tarsus. 59. Pretarsus. 60. Detail of the pretarsus.

Figs 61‒64. Pacificampa wudonghuii Sendra sp. nov. 61. Urotergites III–VIII and IX abdominal segment, left side (holotype, NEIGA-diplura-01). 62. Male first urosternite with glandular a 1 setae. 63. Fourth urosternite, right side. 64. Male eighth urosternite.