Lepidocyrtus rapitalai Giuga & Jordana & Baquero 2023, sp. nov

Autor: Giuga, Luca, Jordana, Rafael, Baquero, Enrique
Rok vydání: 2023
Předmět:
DOI: 10.5281/zenodo.7701304
Popis: Lepidocyrtus rapitalai Giuga & Jordana sp. nov. Figs 4–6; Table 4 Type locality. Western Sicily, Palermo, Camporeale; 37.906002N, 13.072977 E; 510−520 m a.s.l. Type material. Holotype: Female on slide (RAPITALÀ_FSA_#1L_05- II), Camporeale, Palermo Province, Sicily, vineyards on soil, 01.iv.2021, leg. L. Giuga. Paratypes: three specimens (#1L_05-I female, #1L_05- III male, #3i_08 male) on slide, same data as holotype. Holotype and three paratypes deposited at MZNA. Diagnosis. Ant I−III and legs scaled. Ant III sense organ with two curved and expanded sensilla. Head Mc Pa 5 present; A 0, A 2 and A 3 as Mc; posterior labial row with M 1, M 2, R, E, L 1 and L 2 ciliated Mc; labrum with a 1 apically branched chaetae. Th I–III without Mc; Abd II with m 3 as ciliated Mc; Abd IV with four median Mc (Sm, B 4-6), three non-fan-shaped ciliated mic above anterior bothriotrichum; claw with three internal teeth: two basal and one unpaired; empodium acuminate and serrate; manubrial plate with two internal and 2−3 external chaetae and two pseudopores. Description. Body length up to 1.45 mm, including head (mean 1.11 mm, n = 4 adults), excluding antennae (holotype: 0.95 mm). Color pale except blue dark on ocular patches, interocular area, coxae, end of Ant II−IV. Scales on Ant I−III ventral and dorsal head and body, coxae I−III, femora-tibiotarsus I−III, dorsally and ventrally on manubrium and only dorsally on dens; manubrium and dens length 200 µm and 228µm respectively (n = 4); nonannulated part of dens 2.5 times the length of mucro. Head. Antennal head ratio 1.51 (n= 4). Ant IV without apical bulb; subapical organite and accessory sensillum as in Fig. 4E; Ant III sense organ with two curved and expanded sensilla (Fig. 4F), and three guard sensilla; Ant II with one distal similar to Ant III expanded sensillum. Head Mc Pa 5 present, A 0, A 2 and A 3 as ciliated Mc smaller than An (although of a different size from the large Mc present in other species, or in other parts of its body; on the other hand the insertion is clearly greater than those of the mic); also with a pair of smaller supplementary Mc A 2a between A 0 and A 2; present only the chaeta p intraocular; head dorsal chaetotaxy (Fig. 4A) with 7−8 Ant (An) ciliated Mc; four prelabral ciliated chaetae; labrum with three rows, ‘a’ row with a 1 apically branched chaetae (more than two branches), a 2 smooth chaetae, ‘m’ and ‘p’ with five smooth chaetae (Fig. 4B). Four labral papillae, with two or three projections (Fig. 4D). Maxillary palp bifurcated with three sublobal appendages. Labial papilla (l.p.) E with finger-shaped process not reaching at base of apical appendage. Labial row with M 1 *, M 2, R*, E, L 1, and L 2 ciliated Mc (M 1 and R 85 % of M 2) (Fig. 4G). Postlabial chaetotaxy with 3 +1 ciliated central Mc along the groove (Fig. 4C). 11+ 11 spinelike chaetae on posterior dorsal head (Fig. 4A). Thorax (Fig. 5A). Th II and Th III without Mc; Th II with ‘ms’ and ‘al’ in antero-lateral position, at level of ‘a’ row; Th III with a 1 −a 3, a 5 –a 6, m 2 −m 4, m 6, p 1 −p 6 present; lateral tergite with three mes and the lateral sensillum (al). Abdomen. Abd I with 12 chaetae: a 1 –a 3, a 5 –a 6; m 2 −m 6; p 5 −p 6 (with the ‘ms’ near a 6) (Fig. 5A). Ventral tube as in Figure 6D. Abd II (Fig. 5A) a 2 (a), a 3, a 6 and a 7 as smooth mic, a 5 as bothriotrichum, and lm and ll above a 5; a 2p (p) present as smooth mic; m 2 as bothriotrichum, m 3 (B) and m 5 as Mc, m 3e (q 1), m 4, and m 6 as smooth mic, and m i above m 2; a 2p, p 4 (q 2), p 5 –p 7 as smooth mic, ‘as’ above m 3. Abd III (Fig. 5B) with two Mc (pm 6 and p 6) and with 18 microchaetae; three bothriotricha a 5, m 2, and m 5. Bothriotricha a 5 surrounded by three anterior chaetae (li, lm, and ll) and three posterior ones (am 6, em, and im). Abd IV without s chaetae over bothriotrichum T 2. In central area of the tergum four Mc present: Sm, B 4, B 5, and B 6. The remaining chaetotaxy as in Fig. 5B. Abd V with S-chaetae as, acc.p4 and acc.p5 (Fig. 5B). Legs. Scales on legs (including all coxae). Trochanteral organ ‘V’ shaped with about seven spine-like chaetae (n =4) three on each rami and one on the center. Claw with three teeth on inner edge: basal pair at 50 %, an unpaired median at 65%; two lateral teeth intermediate to base and paired, and one more basal dorsal tooth. Empodium acuminate, 0.61 times the length of claw, with pe lamella serrated, other lamellae smooth (ae, ai, pi). Tita III distally with one inner smooth chaeta longer than empodium; tenent hair spatulated, smooth, as long as claw (22 µm in length) (Fig. 6C). Furcula. Manubrium with scales dorsally and ventrally. Dens with scales only dorsally (Fig. 6A); manubrium and dens length 200µm and 228 µm respectively (n =4); manubrial plate (dorsally) with two internal chaetae, with 2−3 external chaetae, and 2 psp (Fig. 6B). Non-ringed area of dens 2,5 times the length of mucro (Fig. 6A). Pseudopores. Following the nomenclature of Mateos et al. (2021) the pseudopores observed are: antenna: Ant I, 1; Ant II, 1; Ant III, 1. Head dorsal (cephalic int Ant I), 1. Body dorsal: Th II, 1; Th III, 1; Abd I, 1; Abd II, 1; Abd III, 1; Abd IV, 1. Body ventral: Th I, 1; Th II, 1; Th III, 1; Abd I - ant. VT base, 1; Abd I - post. VT base, 1; Abd II, (4). Legs: coxa I, 2; coxa II, 2; coxa III, 2. Furca dorsal: manubrial base, 1; manubrial plate, 2. Macrochaetotaxy. Reduced formula (from Gisin 1965, 1967a, b): R 0 R 1 R 2 001/00/0101+3/0, paBq 1 q 2, M 1 *M 2 R*EL 1 L 2 (*85% of M 2). Ecology and distribution. All specimens were obtained in the same locality, in vineyard soil. According to the available data of presence, L. rapitalai sp. nov. occurs with a low frequency. Etymology. The specific epithet refers to the presence of this species in the Rapitalà district and to the homonymous winery that is located on it. Discussion. L. rapitalai sp. nov. belongs to the species of lignorum -group; all of them have trunk macrochaetotaxy formula 00/0101+3 (Mateos 2011); the species of this group with A 0, A 2, A 3 and Pa 5 as Mc are: L. barbulus Mateos, 2011, L. chorus Mateos & Lukić, 2019, L. fuscocephalus Mateos, 2022 in Mateos & Álvarez-Presas 2022, L. instratus Handschin, 1924, L. intermedius Mateos, Escuer & Alvarez-Presas, 2018 in Mateos et al., 2018, L. juliae Mateos, 2011, L. labyrinthi Baquero & Jordana, 2021 in Baquero et al., 2021, L. lignorum (Fabricius, 1793), L. milagrosae Mateos, 2022 in Mateos & Álvarez-Presas, 2022, L. paralignorum Baquero & Jordana, 2021 in Baquero et al., 2021, L. peisonis Traser & Christian, 1992, L. pulchellus Denis, 1926, L. ruber Schött, 1902, L. semicoloratus Mateos, 2022 in Mateos & Álvarez-Presas, 2022, L. tellecheae Arbea & Jordana, 1990, L. traseri Winkler, 2016, L. uzeli Rusek,1985, L. vexillosus Loksa & Bogojević, 1967, L. violaceus (Geoffroy, 1762), and L. rapitalai sp. nov. With respect to all of them the new species is separated by having labial R chaeta as Mc, labrum with a 1 apically branched chaetae, claw with three teeth on inner edge, and by other characters shown in Table 4. The species L. intermedius, L. vexillosus and L. ruber have not been included in the Table 4 because, although they can be considered as belonging to the lignorum -group (Mateos 2020), they differ from the rest of species by lacking A 3 (like Mc), the first two, and Pa 5 (as Mc), the third. In relation to the new denomination of the Mc Sm on Abd IV (Zhang et al. 2019), it must be considered that this chaeta has been called C 1 in the descriptions of Lepidocyrtus, Pseudosinella and other genera since the work of Szeptycki (1979). This must be taken into account when referring to previously described species since in them it is not known whether the chaeta is C 1 or Sm.
Published as part of Giuga, Luca, Jordana, Rafael & Baquero, Enrique, 2023, Three new species of Collembola from Sicily with first record of the genus Superodontella Stach, 1949 from Italy, pp. 559-576 in Zootaxa 5249 (5) on pages 567-568, DOI: 10.11646/zootaxa.5249.5.3, http://zenodo.org/record/7701301
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