Colinauropus foliosus, Bu, 2020

Bu, Yun, 2020, First record of the family Colinauropodidae (Myriapoda, Pauropoda) in China, with the description of three new species, ZooKeys 947, pp. 53-70: 53

publication ID

http://dx.doi.org/10.3897/zookeys.947.53723

publication LSID

lsid:zoobank.org:pub:7E8524DC-A5E1-4F8A-BE1F-089CDFFEE7F8

persistent identifier

http://treatment.plazi.org/id/867E5192-CE51-4339-947B-7C17D668C86E

taxon LSID

lsid:zoobank.org:act:867E5192-CE51-4339-947B-7C17D668C86E

treatment provided by

ZooKeys by Pensoft

scientific name

Colinauropus foliosus
status

sp. nov.

Colinauropus foliosus   sp. nov. Figures 7 View Figure 7 , 8 View Figure 8 , 9 View Figure 9

Material examined.

Holotype, female adult with 9 pairs of legs (slide no. SC-PA2017002), China, Sichuan Province, Ganzi Tibetan Autonomous Region, Kangding City, Yala town, 30°06'N, 101°57'E, elev. 3100 m, soil samples from mixed forest, 11-VIII-2017, coll. C.W. Huang. Paratypes, 1 male adult with 9 pairs of legs (slides no. SC-PA2017001) and 1 female adult with 9 pairs of legs (slide no. SC-PA2017003), same data as holotype.

Diagnosis.

Colinauropus foliosus   sp. nov. is characterized by the leaf-shaped pubescent setae on head and tergites; tergite I with one large sclerotized plate; tergites II-IV each with 4 large and 4 small plates; tergite V with 4 large and 2 small middle sclerotized plates; tergite VI with 2 large plates; granules on plates ovoid, each inserted with one fine hair; seta st on tergum of pygidium clavate; bothriotrichum T 3 with thick axis and dense tufted pubescence distally.

Description.

Adult body length 1.28 (-1.32) mm (N = 3); body white-yellow in alcohol, sclerotized plates on tergites brown (Fig. 8A View Figure 8 ).

Head (Figs 7A View Figure 7 , 8D View Figure 8 ). Dorsal setae distinctly differentiated, on first and second rows cylindrical to tapering; on third and fourth rows leaf-shaped and with long pubescence; seta a 3 of second row slender and tapering. Relative lengths of setae, 1st row: a 1 = 10, a 2 = 10 (-12); 2nd row: a 1 = 10 (-11), a 2 = (11-) 12, a 3 = 12 (-13); 3rd row: a 1 = (18-) 20, a 2 = 18 (-20); 4th row: a 1 = 13 (-16), a 2 = (15-) 17, a 3 = 20 (-23), a 4 = 16 (-17); lateral group setae l 1 =18 (-24), l 2 = 18 (-23), l 3 = 25(-32); the ratio a 1/ a 1- a 1 in 1st row (1.6-) 1.7, 2nd row (0.7-) 0.8, 3rd row1.0 (-1.1) and 4th row 0.7 (-0.8). Temporal organs oval in dorsal view, their length (0.8-) 0.9 of their shortest distance apart. Pistil present. Head cuticle with coarse granules.

Antennae (Figs 7C View Figure 7 , 8B, C View Figure 8 ). Antennal segments 1-3 with 2, 2, 3 short cylindrical pubescent setae respectively, and 1 rudimentary seta present on segment 3. Antennal segment 4 with 4 tapering setae and a short, rudimentary u; relative lengths of setae: p = 10, p ' = 7 (-8), p' ’’ = (6-) 7, r = 5 (-6), u = 1; tergal seta p (0.9 of -) 1.0 times as long as tergal branch t; the latter cylindrical, 1.8 (-2.0) times as long as its greatest diameter and 0.7 (-0.9) of sternal branch s, which itself about 2.0 times as long as its greatest diameter. Seta q cylindrical, annulate, 0.8 (-1.0 times as long as) of s. Relative lengths of flagella (base segments included) and base segments: F 1 = 100, bs 1 = 8 (-11); F 2= (35-) 42, bs 2 = (4-) 5; F 3 = (78-) 93, bs 3 = 7 (-9). F 1 (5.8-) 8.6 times as long as t, F 2 and F 3 2.0 (-2.1) and 4.4 (-4.8) times as long as s respectively. Distal calyces spherical; apex of flagella fusiform, on F 1 and F 3 with a short lateral flap. Globulus g 1.7 times as long as wide; about 12 bracts, capsule spherical; width of g (0.4-) 0.6 of the greatest diameter of t. Antennal cuticle granulated.

Trunk. Setae on collum segment cylindrical, annulate; sublateral setae length 22 (-34) μm, (1.4-) 1.7 times as long as submedian setae; sternite process triangular, furcate and granulated; appendages tapering (Fig. 8E View Figure 8 ). Tergite I with 4+4 leaf-shaped setae (22-27 μm) and 1 large sclerotized plate (Fig. 8F View Figure 8 ); Tergites II-IV each with 6+6 setae (18-40 μm), 4 large and 4 small sclerotized plates (Figs 7B View Figure 7 , 8G-I View Figure 8 ); Tergite V with 6+6 slender setae (20-40 μm), 4 large and 2 small sclerotized plates, posterior plates square (Figs 8J View Figure 8 , 9A View Figure 9 ); Tergite VI with 4+2 setae and 2 large plates (Fig. 8K View Figure 8 ), posterior setae 35 μm long, their mutual distance 24 (-26) μm (Fig. 8K View Figure 8 ). Sockets of some setae on tergites and bothriotricha with distinct thickened cuticle surrounded (Figs 7B, D, E View Figure 7 , 8F-J View Figure 8 ). Sclerotized plates with ovoid, brown granules, diameter 1.5-5.0 μm and each with one long curved hair (Figs 7B View Figure 7 , 9A View Figure 9 ). Cuticle granulated or pubescent.

Male genital papillae (Fig. 9E View Figure 9 ) glabrous, subuliform, 1.5 times as long as greatest diameter; seta 0.5 of the length of papilla. Seta on coxa of leg 2 in male with two adjacent setae (only 1 thick setae in female, 20-25 μm), both cylindrical and annulate, one thick and short, 17 μm in length, another slender and longer, 20 μm in length (Fig. 9E View Figure 9 ).

Bothriotricha   . Relative lengths: T 1 = 100, T 2 = (110-) 100, T 3 = (95-) 105, T 4 =114 (-120), T 5 = (115-) 120. T 1, T 2, T 4 and T 5 thin, long, with short erect pubescence on axes (Fig. 7E View Figure 7 ). T 3 cylindrical, with thicker axis and dense tufted pubescence in distal 2/3 part (Fig. 7D View Figure 7 ).

Legs. First and last pair of legs 5-segmented, others 6-segmented (Fig. 9C, D View Figure 9 ). Setae on coxa and trochanter of legs 1-8 cylindrical, annulate (Fig. 9B View Figure 9 ), length 23 (-26) μm and 23 (-27) μm respectively. Seta on coxa of leg 9 cylindrical, annulate, length 22 (-25) μm (Fig. 9D View Figure 9 ). Seta on trochanter of leg 9 furcate, with subcylindrical, annulate, blunt branches, shorter branch about 0.5 of longer one (Fig. 9D View Figure 9 ). Tarsi 1-8 with short, annulate distal seta (6-8 μm) only (Fig. 9C View Figure 9 ). Tarsus of leg 9 tapering, 48 (-55) μm in length, 3.7 (-4.2) times as long as its greatest diameter (Fig. 9F View Figure 9 ), proximal seta slender, pointed, pubescent, 12 (-15) μm in length; distal one cylindrical, annulate, 6 (-8) μm in length, about 0.1 of the tarsal length. Cuticle of tarsus pubescent.

Pygidium. Tergum. Posterior margin straight. Relative lengths of setae: a 1 = 10, a 2 = (8-) 9, a 3 = (12-) 16, st = (7-) 9. Setae a 1 cylindrical, pubescent; a 2 and a 3 slender and pubescent (Figs 7F View Figure 7 , 8K View Figure 8 ); st clavate, pubescent (Fig. 7G View Figure 7 ). Distance a 1- a 1 (0.6-) 0.8 of a 1; distance a 1- a 2 2.0 (-2.5) times as long as a 2- a 3; distance st - st (1.5-) 1.6 times as long as st and (1.7-) 2.0 times as long as distance a 1- a 1.

Sternum (Figs 7G View Figure 7 , 8L View Figure 8 ). Posterior margin straight between b 1. Relative lengths of setae (a 1 =10): b 1 = (25-) 29, b 2 =14 (-15). Seta b 1 cylindrical, thick, annulate; b 2 tapering, short, pubescent. Distance b 1- b 1 (0.7-) 0.8 of length of b 1; distance b 1- b 2 (0.6-) 0.7 of b 2.

Anal plate round, glabrous, 1.5 times longer than broad, lateral margins bulged in middle part, posterior part divided into two round, pubescent branches, two tiny lobes present at inner side (Figs 7G View Figure 7 , 8L View Figure 8 ).

Etymology.

The species name " foliosus   " from the Latin “foliose”, leaf-shaped, referring to the leaf-shaped setae on head and tergites.

Distribution.

China (Sichuan). Only known from the type locality.

Remarks.

Colinauropus foliosus   sp. nov. differs from all other congeners by having 6 sclerotized plates on tergite V, and the posterior two square-shaped, compared with 4 or 8 irregular plates in congeners. It is similar to C. regis   Remy, 1956 in the leaf-shaped setae on tergites, but they can be easily distinguished by the number of sclerotized plates on tergite I and II (1 and 8 in C. foliosus   sp. nov. vs. 2 and 6 in C. regis   ), shape of the setae in the posterior two rows of the head (leaf-shaped in C. foliosus   sp. nov. vs. cylindrical in C. regis   ), and the shape of anal plate (with two round posterior branches in C. foliosus   sp. nov. vs. with two clavate appendages in C. regis   ).