Protaphorura taimyrica ( Martynova, 1976 )

Sun, Xin, Chang, Liang & Wu, Donghui, 2015, New species and new records of Protaphorura species from northeast China (Collembola: Onychiuridae), Zootaxa 3920 (2), pp. 381-392 : 388-392

Protaphorura taimyrica ( Martynova, 1976)

Figs 28–44

Onychiurus (Protaphorura) taimyrica Martynova, 1976: 30

Material examined. 5 females and 11 males on slides, China: Heilongjiang province: Maoershan National Forest Park (45°24’N, 127°40’E), litter and soil in the mixed coniferous and broad leaved forest, 0 1 June 2013, Gao Meixiang leg. (GMX-MES-2013); 4 females and 2 males on slides, China: Jilin province: Changbai National Forest Park (42°07’N, 128°06’E, alt. ca 1710 m), litter in the coniferous forest, 28 May 2012, Wu Donghui et al. leg. (CB-12-06, CB-12-07); 1 male on slide, China: Jilin province: Changbai National Forest Park (42°40’N, 128°11’E, alt. ca 760 m), litter in the broad leaved forest, 28 May 2012, Wu Donghui et al. leg. (CB-12-22); 1 female and 1 male on slides, China: Heilongjiang province: Linjiang city (48º04’N, 133º32’E), litter and soil under Betula costata Trautv. , 9 August 2012, Wu Donghui et al. leg. (LD-10-483); 2 females on slides, China: Heilongjiang province: Linjiang city (48º04’N, 133º32’E), litter and soil under Populus davidiana Dode , 9 August 2012, Wu Donghui et al. leg. (LD-10-479); 3 females and 1 male on slides, China: Heilongjiang province: Linjiang city (48º04’N, 133º32’E), litter and soil under Quercus mongolica Fisch. , 9 August 2012, Wu Donghui et al. leg. (LD-10-480); 1 female and 1 male on slides, China: Heilongjiang province: Huachuan city: Donghe country (47º07’N, 131º25’E), litter and soil under Quercus mongolica Fisch. , 7 August 2012, Wu Donghui et al. leg. (LD- 10-459).

Description basing on Chinese specimens. Body color white in alcohol. Size 1.70–1.95 mm in females, 1.55–1.65 mm in males; holotype 1.90 mm. Body slender and elongated.

Pseudocellar formula dorsally: 33/01–22/33342, ventrally: 10/000/0 0 0 0 ( Figs 28, 35 , 44 ); subcoxa 1 of legs with 1, 1, 1 pso respectively. Parapseudocellar formula ventrally: 1/000/ 100001m ( Figs 35 , 40 ); subcoxa 1 of legs with 1, 1, 1 psx respectively. Pseudopores formula dorsally: 00/011/1111, ventrally: 0/111/01m 1m1m ( Figs 28, 35 , 44 ).

Head. Antennae nearly as long as head. Ant. IV with a subapical organite; basolateral ms about 1/4 of segment length from base, above the second proximal row of chaetae ( Fig. 32 ). Ant. III sensory organ composed of 5 papillae, 5 guard chaetae, 2 small sensory rods, 2 granulated sensory clubs and a lateral ms ( Fig. 30 ). Ant. I with 11 chaetae. Ant. II with 18 chaetae. Antennal bases with distinct granulation ( Fig. 28 ).

PAO composed of 27–31 simple vesicles ( Figs 29 , 36 ). 4+4 p-chaetae between postero-internal pso on head ( Figs 28 , 36 ). 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’) ( Fig. 31 ); labial type A, papillae A–E respectively with 1, 4, 0, 3, 3 guard chaetae ( Fig. 31 ). Postlabial chaetae 5+5 along ventral groove, sometimes with asymmetrical chaetae ( Fig. 37 ).

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 ms laterally ( Figs 28 , 44 ). Th. I tergum with 11–14 chaetae ( Fig. 28 ). Abd. I–III and V terga without s’ ( Figs 28 , 42 ). Abd. IV–V terga with several asymmetrical chaetae along the axial line, Abd. VI tergum with m0 axial chaeta ( Figs 28 , 38, 41 ). Ratio M/sp on Abd. V as 1.8–2, M/ AS as 2.8–3 ( Figs 28 , 38, 41 ). Straight lines passing through the bases of chaetae a1 and m1 slightly convergent on Abd. VI tergum ( Figs 28 , 38, 41 ). Th. I–III sterna with 1+1, 1+1, 2+2 chaetae, respectively. Ventral tube with 9+9 distal chaetae and 2+2 basal chaetae, without anterior chaetae. 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 of fold; three manubrial rows of chaetae present posteriorly to dental chaetae ( Figs 35 , 39 , 43 ). Female genital plate with 13–20 chaetae, male genital chaetae plate with 31–35 chaetae. 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. 40 ).

Appendages. Subcoxa 1 of legs I–III with 5, 7 and 5 chaetae, subcoxa 2 with 1, 5 and 5 chaetae, respectively. Tibiotarsi of legs I–III with 22 (11, 8, 3), 24 (11, 8, 5) and 23 (11, 8, 4) chaetae, respectively ( Figs 33, 34 ). Unguis with inner tooth. Unguiculus slender and pointed, as long as inner edge of unguis, without inner basal lamella ( Figs 33, 34 ). Anal spines set on distinct papillae, about 0.6–0.7 times as long as inner edge of unguis ( Figs 28 , 38, 41 ).

Remarks. Protaphorura taimyrica ( Martynova, 1976) was redescribed basing on the type material and other material from Russia by Babenko and Kaprus’ (2014). The main morphological characters of the specimens from northeast China are in accordance with the redescription of Babenko and Kaprus’. In addition, there are variations in our material: some individuals have the dorsal pso formula as 33/012/33342, but none of them show as 33/022/ 33343; all of our specimens lack the psx on the Abd. II sternum as the specimens from Magadan Province (Babenko & Kaprus’ 2014); all of our specimens have 1+1 chaetae on the Th. II sternum (2+ 2 in Russian specimens); straight lines passing through the bases of chaetae a1 and m1 slightly convergent (parallel in Russian specimens).

Until now, in the genus Protaphorura , there are 10 known species which have the dorsal pso formula as 33/ 022/33342 (Bellinger et al. 1996–2014, Babenko & Kaprus’ 2014): P. taimyrica ( Martynova, 1976) from Russia and China, P. spinoidea ( Steiner, 1955) and P. paranemorata ( Selga, 1962) from Spain, P. subnemorata ( Gisin, 1957) from Austria, P. zori ( Martynova, 1975) from Parmir Mountains, P. montana ( Mateos et Arbea, 1986) and P. quercetana ( Mateos et Arbea, 1986) from Spain, P. sensillata ( Khanislamova, 1986) from Bashkiria, P. boedvarssoni Pomorski, 1993 and P. stogovi Pomorski, 1993 from the White Sea shore ( Russia). The main diagnostic characters of them are shown in Table 1 .

The individuals of P. taimyrica who have the dorsal pso formula as 33/012/33342 belong to the ‘oligopseudocellar’ group, as the new species P. genheensis sp. nov. described above. The main differences among them refer to Table 2 .

Figures

FIGURES 28 – 35. Protaphorura taimyrica (Martynova, 1976): 28, dorsal chaetotaxy; 29, PAO; 30, Ant. III sensory organ; 31, labium; 32, Antenna; 33, distal part of leg I; 34, distal part of leg III; 35, chaetotaxy of Abd. II – VI sterna. Scales: 0.1 mm (28, 32 – 35), 0.01 mm (29 – 31).

FIGURES 36 – 41. Protaphorura taimyrica (Martynova, 1976): 36, chaetotaxy of dorsal side of head; 37, chaetotaxy of ventral side of head; 38, chaetotaxy of Abd. IV – VI terga; 39, chaetotaxy of central part of Abd. IV sternum; 40, anal valves; 41, chaetotaxy of Abd. IV – VI terga. Scales: 0.1 mm.

FIGURES 42 – 44. Protaphorura taimyrica (Martynova, 1976): 42, chaetotaxy of Abd. III tergum; 43, chaetotaxy of central part of Abd. IV sternum; 44, chaetotaxy of Th. I – III terga. Scales: 0.1 mm.

Tables

TABLE 2. The main diagnostic characters of the species which have the dorsal pso formula as 33 / 022 / 33342 in the genus Protaphorura.

Ventral psx formula Number of pso on of legs I–III	subcoxa 1	Number of chaetae on Th. Inner I–III sterna	tooth on unguis
continued.
Chaeta m on Chaeta s’ on Abd. Chaeta s’ on Th. I I–III Abd. V	M/AS*	Relative position of prespinal microchaetae on Abd. VI	Length of AS