Lepidocyrtus (Acrocyrtus) huizhouensis Ma, 2019, sp. nov.
Creators: name: Ma, Yitong
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Entognatha
Collembola
Entomobryidae
Lepidocyrtus
Lepidocyrtus huizhouensis

description: Lepidocyrtus (Acrocyrtus) huizhouensis sp. nov.
urn:lsid:zoobank.org:act: 84932A79-4AF3-4A55-B732-77B63164F3AC
Figs 1–9, 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.
Notes: – absent; + present; –/+ absent or present.
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 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). Ant. III with 6 to 11 rods distally (Fig. 2B). Ant. II with 3 rods distally (Fig. 2C). Ant. I with 3 dorsal spiny mic (Fig. 3B). Lateral process (l.p.) of labial palp straight, tip apically pointed and not reaching apex of papilla E (Fig. 2D). Subapical chaeta of maxillary outer lobe subequal to apical one, appendages on sublobal plate not clearly seen (Fig. 2E). 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 F–G). Labral chaetae 4/5, 5, 4, all smooth; labral papillae 4, inner papillae apically rounded, outer papillae truncate (Fig. 3A). Frontal area of dorsal head with 5+5 or 6+7 clubbed chaetae (Fig. 3 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).
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). Trochanteral organ with 23 smooth, spiny chaetae (Fig. 4B). 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).
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 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 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 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 A−B). Abd. V with 3 S-chaetae (Fig. 8 A−B).
VENTRAL TUBE. Anterior face with 21 ciliate chaetae (Fig. 8C). Posterior face with 1+1 smooth chaetae and 19 ciliate chaetae apically, not clearly seen proximally (Fig. 8D). Lateral flap with 5 smooth and 9 ciliate chaetae (Fig. 8E).
FURCULA. Manubrium ventrally with 3 apical ciliate chaetae per side (Fig. 9A), manubrial plaque (dorsally) with 18−21 ciliate chaetae and 2 pseudopores on each side. Dental tubercle conically pointed (Fig. 9 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 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).
description: Published as part of Ma, Yitong, 2019, Two new species of Lepidocyrtus Bourlet s. lat. (Collembola: Entomobryidae) from China, pp. 1-21 in European Journal of Taxonomy 565 on pages 2-11, DOI: 10.5852/ejt.2019.565, http://zenodo.org/record/3491729