Protaphorura bicampata (Gisin, 1956)

Sun, Xin, Zhang, Bing & Wu, Donghui, 2013, Two new species and one new country record of Protaphorura Absolon, 1901 (Collembola: Onychiuridae) from northeast China, Zootaxa 3673 (2), pp. 207-220 : 208-211

publication ID

https://doi.org/ 10.11646/zootaxa.3693.2.7

publication LSID

lsid:zoobank.org:pub:A47BD6E6-E2DF-4F54-AF4C-7EAA81556DBD

DOI

https://doi.org/10.5281/zenodo.5677209

persistent identifier

https://treatment.plazi.org/id/06041A0E-9657-657B-FF54-FDD0F3128D4E

treatment provided by

Plazi

scientific name

Protaphorura bicampata (Gisin, 1956)
status

 

Protaphorura bicampata (Gisin, 1956)

Figs 1–13 View FIGURES 1 – 7 View FIGURES 8 – 13 & 25 View FIGURES 25 – 29

Onychiurus bicampatus Gisin, 1956: 344 .

Material examined. 18 females and 6 males on slide, China: Heilongjiang: Honghe Farm (47°35’ N, 133°31’ E), 10 Aug. 2012, soil, Zhang Bing leg. – ibid: 15 females and 4 males on slide, 20 Mar. 2012, Zhang Bing leg.; 5 females and one male on slide, China: Heilongjiang: Xinqing national forest park (48°14’ N, 129°29’ E), 0 2 July, 2011, soil, Sun Xin et al. leg.; 3 females and one male on slide, China: Jilin: Baishan: Fusong: Manjiang (alt. 850m, 41°57’ N, 127°34’ E), 0 1 Sept. 2009, soil, Wu Donghui leg.

Description of Chinese specimens. Body color white in alcohol. Size 1.8–2.4 mm in females, 1.7–2.0 mm in males. Body slender and elongated.

Pseudocellar formula dorsally: 33/022/33332, ventrally: 10/000/00000; subcoxa 1 of legs without pso ( Figs 1, 7 View FIGURES 1 – 7 & 8 View FIGURES 8 – 13 ). Parapseudocellar (psx) formula ventrally: 00/000/ 111100; subcoxa 1 of legs without psx ( Figs 1, 7 View FIGURES 1 – 7 & 8 View FIGURES 8 – 13 ). Pseudopores formula dorsally: 00/011/ 111100, ventrally: 00/111/0xxx00 ( Figs 1, 7 View FIGURES 1 – 7 & 8 View FIGURES 8 – 13 ).

Head. Antennae nearly as long as head. Ant. IV with a subapical organite and basolateral ms about 1/4 of segment length from base. Ant. III sensory organ composed of 5 papillae, 5 guard chaetae, 2 small sensory rods, 2 granulated sensory clubs and a lateral ms ( Figs 2 & 3 View FIGURES 1 – 7 ). Ant. I with 10–11 chaetae. Ant. II with 16–17 chaetae. Antennal bases with distinct granulation. PAO composed of 29–40 simple vesicles ( Fig. 4 View FIGURES 1 – 7 ). 4+4 p-chaetae between posterior a-pso on head ( Fig. 1 View FIGURES 1 – 7 ). Mandible with strong molar plate and 4 apical teeth. Maxilla bearing 3 teeth and 6 lamellae. Maxillary palp simple with 1 basal chaeta and 2 sublobal hairs. Labral chaetae formula 4/342. Labium with 7 proximal, 4 basomedian (E, F, G and f) and 6 basolateral chaetae (a, b, c, d, e, e’); labial type A, papillae A– E respectively with 1, 4, 0, 3, 3 guard chaetae ( Fig. 5 View FIGURES 1 – 7 ). Postlabial chaetae 5+5 along ventral groove ( Fig. 8 View FIGURES 8 – 13 ).

Body chaetotaxy. Dorsal chaetotaxy usually with some asymmetry, well differentiated into macro-, meso- and microchaetae. Chaetae s very weakly marked. Th. II–III terga with microsensilla laterally ( Fig. 1 View FIGURES 1 – 7 ). Th. I tergum with 13–14 chaetae (chaetotaxy type i 3 m) ( Figs 1 & 6 View FIGURES 1 – 7 ). Abd. I–III and V terga with chaeta s’ ( Figs 1 View FIGURES 1 – 7 & 25 View FIGURES 25 – 29 ). Abd. IV tergum with m0 axial chaeta, Abd. V tergum with m0 and p0 axial chaetae, Abd. VI tergum with m0 axial chaeta (rarely with a0) ( Fig. 1 View FIGURES 1 – 7 ). Ratio M/sp on Abd. V as 1.4–1.6. Straight lines passing through the bases of chaetae a1 and m1 distinctly convergent on Abd. VI tergum ( Fig. 1 View FIGURES 1 – 7 ). Anal spines present on distinct papillae, 0.6 times as long as inner edge of unguis.

Th. I–III sterna with 1+1, 2+2, 2+2 chaetae, respectively. Ventral tube with 8–10 distal chaetae and 2+2 basal chaetae, without anterior chaetae ( Fig. 11 View FIGURES 8 – 13 ). Furca reduced to cuticular pocket with 2+2 dental chaetae––1+1 chaetae located on a cuticular fold, remaining 1+1 chaetae located distinctly below the fold; three manubrial rows of chaetae present posteriorly to dental chaetae ( Fig. 10 View FIGURES 8 – 13 ). Female genital plate with 25–40 chaetae, male genital plate with 35–50 chaetae ( Fig. 12 View FIGURES 8 – 13 ). Male ventral organ absent. Anal valves with numerous acuminate chaetae; each lateral valve with a0, 2a1 and 2a2; upper valve with chaetae a0, 2a1, 2b1, 2b2, c0, 2c1, 2c2 ( Fig. 13 View FIGURES 8 – 13 ).

Appendages. Subcoxa 1 of legs I–III with 5, 7 and 6–7 chaetae, subcoxa 2 with 1, 5 and 5 chaetae, respectively. Tibiotarsi of legs I–III with 22 (11, 8, 3), 21 (11, 8, 2) and 22–23 (11, 8, 3 or 4) chaetae, respectively. Unguis with small inner denticle. Unguiculus slender and pointed, as long as inner edge of unguis, without inner basal lamella ( Fig. 9 View FIGURES 8 – 13 ).

Ecology. In China, this species was first found in farmland planted with soya bean, but was later also found in marshland and forest.

Remarks. Protaphorura bicampata (Gisin, 1956) is characterized by the pso formula on the body, the absence of the pso on subcoxa 1 of the legs, the presence of chaeta s’ on Abd. I–III and V terga and the straight lines passing through the bases of chaetae a1 and m1 distinctly convergent on Abd. VI tergum. This species was first reported from Denmark by Gisin (1956) and later from Iceland (Bödvarsson 1967), Siberia (Martynova 1976), Britain (Hopkin 1997) and Norway (Fjellberg 1980, 1998). Pomorski (1990) considered P. islandica (Bödvarsson, 1959) to be a synonym of P. bicampata , since the only difference between them was the absence of one pso on the Abd. V tergum. Later (Pomorski 1998), he described Polish specimens as P. bicampata , but with the dorsal pso formula 33/ 022/33333 (as in P. islandica ). Fjellberg (1998) mentioned P. bicampata from dry localities and P. islandica from wet localities. Specimens mentioned by Pomorski (1998) are also from wet localities. We therefore reject the synonymy presented by Pomorski (1990).

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