Lepidocyrtus (Acrocyrtus) huizhouensis, Ma & Ma, 2019

Ma, Yitong, 2019, Two new species of Lepidocyrtus Bourlet s. lat. (Collembola: Entomobryidae) from China, European Journal of Taxonomy 565, pp. 1-21 : 2-11

publication ID	https://doi.org/ 10.5852/ejt.2019.565
publication LSID	lsid:zoobank.org:pub:86D073C6-481E-4929-B978-100C36A911B6
DOI	https://doi.org/10.5281/zenodo.5612354
persistent identifier	https://treatment.plazi.org/id/84932A79-4AF3-4A55-B732-77B63164F3AC
taxon LSID	lsid:zoobank.org:act:84932A79-4AF3-4A55-B732-77B63164F3AC
treatment provided by	Plazi
scientific name	Lepidocyrtus (Acrocyrtus) huizhouensis
status	sp. nov.

Treatment

Lepidocyrtus (Acrocyrtus) huizhouensis sp. nov.

urn:lsid:zoobank.org:act:84932A79-4AF3-4A55-B732-77B63164F3AC

Figs 1–9 View Fig View Fig View Fig View Fig View Fig View Fig View Fig View Fig View Fig , Table 2 View Table 2

Diagnosis

Blue pigment distrubuted on antennae, head, body tergites, manubrium, femora and tibiotarsi. Irregular patches present on Th. II–III. Scales present on Ant. I–II, femora and tibiotarsi. Ant. III with 6 to 11 rods distally. Labial chaetae M and R ciliate, m, e, l 1 and l 2 smooth. Frontal area of dorsal head with several clubbed chaetae. C1 on Abd. IV smooth mic. Subapical tooth of mucro much smaller than apical tooth.

Etymology

Named after the type locality, Huizhou City.

Type material

Holotype

CHINA: ♀; Guangdong Province, Huizhou City, Longmen County, Shangping Village ; 23°38′31.31″ N, 113°50′38.68″ E; in litter; collection no. 1125; 24 Aug. 2010; Yitong Ma leg.; with aspirator; on slide; NTU. GoogleMaps

Paratypes

CHINA: 2 ♀♀; same collection data as for holotype; on slides; NTU .

Description

MEASUREMENTS. Body (head + trunk) length up to 2.07 mm, holotype 2.07 mm long.

COLOUR. Body completely dark blue with depigmented spots; anterior head, distal collophore and dens depigmented; eyepatches dark ( Fig. 1 View Fig A–B).

SCALES. Scales ciliate, oval to circular, present on Ant. I–II, both sides of head, thoracic and abdominal tergites, femora and tibiotarsi, and ventral side of furcula. Other appendages without scales.

HEAD. Antenna 0.33–0.35 times as long as body. Antennal segment ratio of I:II:III:IV = 1.00:2.00– 2.62:1.64–2.09:3.29–4.20, in holotype 1.00:2.27:1.73:3.36. Ant. IV without apical bulb ( Fig. 2A View Fig ). Ant. III with 6 to 11 rods distally ( Fig. 2B View Fig ). Ant. II with 3 rods distally ( Fig. 2C View Fig ). Ant. I with 3 dorsal spiny mic ( Fig. 3B View Fig ). Lateral process (l.p.) of labial palp straight, tip apically pointed and not reaching apex of papilla E ( Fig. 2D View Fig ). Subapical chaeta of maxillary outer lobe subequal to apical one, appendages on sublobal plate not clearly seen ( Fig. 2E View Fig ). Labial chaetae MmRel 1 l 2, M and R ciliate, others smooth; M and R 0.81–0.83 and 0.47–0.54 times as long as m, respectively ( Fig. 2 View Fig F–G). Labral chaetae 4/5, 5, 4, all smooth; labral papillae 4, inner papillae apically rounded, outer papillae truncate ( Fig. 3A View Fig ). Frontal area of dorsal head with 5+5 or 6+7 clubbed chaetae ( Fig. 3 View Fig B–D). Head dorsal chaetotaxy with 6 median (M), 6 sutural (S), 3 interocular, 3 postsutural (Ps), 5 postoccipital anterior (Pa), 2 postoccipital medial (Pm), 6 postoccipital posterior (Pp) and 2 postoccipital external (Pe) mic ( Fig. 3B, D View Fig ).

THORAX. Th. II protruded over head and thorax, without mac. Chaetotaxy of anterior part of Th. II not clearly seen, 6 (p1−6) mic on posterior part. Th. III with 16 (a1−4, a6−7, m2, m4−6, p1−6) smooth mic ( Fig. 4A View Fig ). Trochanteral organ with 23 smooth, spiny chaetae ( Fig. 4B View Fig ). Tenent hair weakly ciliate, shorter than inner side of unguis, with tip strongly clavate. Unguis with 3 inner teeth, basal pair located at a distance of 0.34−0.45 from base of inner edge of unguis, distal one smaller than basal pair and at a distance of 0.63−0.72 from base. Unguiculus acuminate, with outer edge serrate ( Fig. 4C View Fig ).

ABDOMEN. Abd. IV 4.00–6.25 times as long as Abd. III along dorsal midline, in holotype 4.21 times. Abd. I with 1 ms and 12 (a1−3, a5−6, m2−6, p5−6) mic ( Fig. 5 View Fig A–B). Abd. II with 1 central S-chaeta (as), 12 (a3, a6−7, m3e, m4, m6−7, p4−7, p5p) mic, 8 (mi, m1, a2, li, lm, ll, 2 supplements) ciliate, accessory fan-shaped chaetae and 2 (m3 and m5) ciliate mac ( Fig. 5 View Fig C−D). Abd. III with 1 central S-chaeta (as) and 1 lateral ms, 7 (a3, m3−4, m7, p3, p5, p7) mic, 10 (mi, m1, a2, li, lm, ll, a6, im, em, emp sometimes absent) ciliate, accessory fan-shaped chaetae and 3 (am6, pm6, p6) ciliate mac ( Fig. 6 View Fig A−B), a7 absent. Abd. IV with 1 anterior (as) and 1 posterior (ps) short S-chaetae, about 25 median elongate S-chaetae, all black as short S-chaetae, 23 (A2−6, B2−3, C1−4, C1p, D1p, D2−3, T1, T3, T5−7, E1, F1−2) mic, 5 (m, a, D1, pi, pe) ciliate, accessory fan-shaped chaetae, 3 (B4−6) median ciliate mac and 7−9 (E2−4, E4p, E4p2, F3, Te3) lateral ciliate mac ( Fig. 7 View Fig A−B). Abd. V with 3 S-chaetae ( Fig. 8 View Fig A−B).

VENTRAL TUBE. Anterior face with 21 ciliate chaetae ( Fig. 8C View Fig ). Posterior face with 1+1 smooth chaetae and 19 ciliate chaetae apically, not clearly seen proximally ( Fig. 8D View Fig ). Lateral flap with 5 smooth and 9 ciliate chaetae ( Fig. 8E View Fig ).

FURCULA. Manubrium ventrally with 3 apical ciliate chaetae per side ( Fig. 9A View Fig ), manubrial plaque (dorsally) with 18−21 ciliate chaetae and 2 pseudopores on each side. Dental tubercle conically pointed ( Fig. 9 View Fig B−C). Distal smooth part of dens about 1.42–1.62 times as long as mucro. Mucro bidentate and basal tooth much smaller than apical tooth, basal spine reaching apex of basal tooth with an accessory spinelet ( Fig. 9 View Fig D−E).

Remarks

Among the 28 species of the subgenus Acrocyrtus Yosii, 1959 , there are only five which have clubbed chaetae on the frontal area of the dorsal head, i.e., Lepidocyrtus (Acrocyrtus) heterolepis Yosii, 1959 , L. (A.) himachalensis Baquero & Jordana, 2015 , L. (A.) liewthatchimi Yoshii, 1982 , L. (A.) solomonensis Yosii, 1960 and L. (A.) transiens Yoshii, 1982 . The new species also has clubbed chaetae and is most similar to L. (A.) heterolepis Yosii, 1959 in colour pattern, but the differences between the two species are great. A spinelet is present and the distribution of smooth chaetae distally on the posterior face of the ventral tube is 1+ 1 in the former, but a spinelet is absent and there are 3+3 smooth chaetae in the latter.

The new species is also similar to L. (Lanocyrtus) pallidus Reuter, 1890 in colour patten, but a dental tubercle and clubbed chaetae on the frontal area of the dorsal head are present in L. (A.) huizhouensis sp. nov., while absent in L. (L.) pallidus ( Table 2 View Table 2 ).