Lepidocyrtus pallidus Reuter 1890
- Dataset
- New data clarifying the taxonomy of European members of the Lepidocyrtus pallidus - serbicus group (Collembola, Entomobryidae)
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Collembola
- order
- Entomobryomorpha
- family
- Entomobryidae
- genus
- Lepidocyrtus
- species
- Lepidocyrtus pallidus
description
Labrum chaetae 4 / 554, prelabral chaetae ciliated, all labral chaetae smooth and pointed. Labrum intrusion inverted V-shaped, labral edge with four rounded papillae. Outer maxillary palp with two smooth chaetae and three smooth sublobal chaetae. Clypeus with ten ciliated chaetae (3 in row pf, 5 in row f, and 2 in row L). Labial palp with lateral process on papilla E slightly curved, not reaching top of papilla. Labium chaetotaxy formed by 5 smooth chaetae (a 1 ‒ a 5) in anterior row; basal row with formula M 1 M 2 rEL 1 L 2 (Fig. 4), all ciliated except r which is vestigial, ratio of r / M ~ 0.05. Ventral cephalic grove with 4 + 4 ciliated chaetae. Dorsal cephalic macrochaetotaxy formula A 0 A 2 a A 2 S 3 Pa 5 (Fig. 5). Eye patches dark blue, eyes well visible. Diameters of eye A ‒ F about the same; eyes G and H smaller (A: G ≈ 2.7; A: H ≈ 1.7). Interocular chaetotaxy with s, t, p, q chaetae and 3 ‒ 4 intraocular scales. Body macrochaetae 00 / 0101 + 2. Th. II to abd. I dorsal chaetotaxy the same as described for L. florae sp. nov. (Figs 20 – 22). Abd. II – III with the same dorsal chaetotaxy as described for L. weidneri and L. pallidus in Hüther (1971), except for mesochaeta a 7 on abd. III which is ciliated in the examined specimens. Abd. IV (Fig. 6) with the same dorsal chaetotaxy as described for L. pallidus in Hüther (1971); on trichobothrial complex chaeta D 1 p two times longer than chaetae C 1 p and T 3 (Fig. 7); one female from sample LP 380 with one extra accessory chaeta of trichobotrium T 2 located between chaetae m and a only on the left side of the body. Abd. V dorsal chaetotaxy as in Fig. 8. Trochanteral organ with 16 ‒ 21 smooth spiny chaetae forming a V shape pattern. Unguiculus acuminate with finely serrated outer edge. Inner edge of unguis with a basal pair of teeth 50 % along its length, and two unpaired teeth at 75 % and 95 %, respectively. Of the basal pair teeth one tooth is much larger than the other, the proximal unpaired tooth is very strong, and the distal one is very weak and difficult to see in many specimens. This unguis morphology match the description done by Hüther for L. weidneri (Hüther 1971: pg 163, Figs 13 – 15). Tibiotarsal tenent hair spatulate. Ventral tube with a maximum of 13 + 13 ciliated chaetae on anterior side and 18 on posterior side. Lateral flap with a maximum of 10 laterodistal chaetae (7 smooth and 3 ciliated). Manubrium with 2 + 2 ciliated apical chaetae on anterior side. Manubrial plate with 2 inner chaetae and 3 – 4 chaetae outer to the 2 pseudopores. Dental tubercle absent.
discussion
Discussion. Based on the redescription of L. pallidus by Hüther (1971: pg. 164) and Gisin (1965: Fig. 1 p), the presence or absence of dorsal cephalic macrochaeta A 3 cannot be argued with certainty. Comments in later papers (Rusek 1985, Traser 2000, Mateos 2008, Winkler & Traser 2012) suggested that this macrochaeta is present. Thanks to the present study of freshly collected specimens of L. pallidus, we can draw the conclusion that this species lacks the dorsal cephalic macrochaeta A 3 and its dorsal head macrochaetae formula can therefore be described as A 0 A 2 a A 2 S 3 Pa 5. It is noteworthy to mention, that the figure of dorsal head of L. pallidus as provided by Fjellberg (2007: Fig. 79 M) erroneously misses macrochaetae A 2 and A 2 a (A. Fjellberg pers. comm.).
materials_examined
Material examined. Three specimens (1 male and 2 females) on slides from garden compost, Vilanova (Philadelphia, USA), position N 40 ° 01 ’ 30.7 ” W 75 ° 21 ’ 04.0 ”, deposited at the UB (sample LP 361), 28. xii. 1999, Arne Fjellberg leg. Five specimens (3 males and 2 females) on slides from Nerium oleander L. soil imported from Germany, Oslo (Norway, exact position unknown), deposited at the UB (sample LP 380), 15. v. 2014, Arne Fjellberg leg. Three females from soil of highly humanized area, Songjiang Qu (Shangai, China), position N 31 ° 05 ’ 46.3 ” E 121 ° 11 ’ 17.1 ”, deposited at the UB (sample LP 467), 30. viii. 2016, Bing Zhang leg. Description based on specimens from three world localities. Body length 0.8 ‒ 1.3 mm (without head nor furca). Th. II not projecting over the head. Head, antennae, trunk and legs up to the femurs bluish-grey. Head apically and laterally bluish-grey, posteriorly white with blue marbling. Blue shades also on manubrium (Fig. 3 a). Antennae, legs beyond coxae, posterior side of the manubrium and ventral tube without scales. (non European species L. fimicolus is also included) “? ”, impossible to establish with the available current information; M, macrochaeta; shM, short macrochaeta; cM, ciliated macrochaeta; cm, ciliated mesochaeta; sm, smooth mesochaeta; ab, above; be, below. Features L. pseudosinelloides 1, 2 L. serbicus 3, 4 L. tomosvaryi 5 L. isabellae 6 L. arrabonicus 7, 8 L. fimicolus 9 L. weidneri 10, 11 L. pallidus 12,13, 14 L. florae sp. nov. Colour diffuse bluish-grey pale-light purple white greyish-blue to dark dark blue light violet-gray to granulated blue diffuse bluish-grey dark blue bluish-black almost black Max length (mm) 2.0 1.9 1.0 1.6 1.35 1.2 1.6 1.6 1.1 Ant. IV apical bulb absent present 4 / absent 3 absent absent absent absent absent absent absent Head macrochaetae A 0 (?) A 2 A 3 M 2 S 3 Pa 5 2 A 0 A 2 aA 2 A 3 M 2 S 3 Pa 5 A 0 A 2 aA 2 A 3 M 2 S 3 Pa 5 A 0 A 2 aA 2 A 3 M 2 S 3 Pa 5 A 0 A 2 aA 2 A 3 Pa 5 A 0 A 2 aA 2 S 3 Pa 5 A 0 A 2 aA 2 S 3 Pa 5 11 A 0 A 2 aA 2 S 3 Pa 5 13,14 A 0 A 2 aA 2 A 3 S 3 Pa 5 Eyes G & H strongly reduced strongly reduced slightly reduced slightly reduced slightly reduced slightly reduced strongly reduced strongly reduced slightly reduced Ocular chaeta q absent 2 absent absent absent absent 7 / present 8 present present present present Labial chaeta R ciliated ciliated ciliated ciliated ciliated spine-like ciliated spine-like ciliated Labial ratio R / M 2 ~ 0.75 ~ 0.7 ~ 0.7 ~ 0.7 ~ 0.6? ~ 0.2 – 0.5 ~ 0.05 ~ 0.7 Abd. II chaeta Li? absent absent absent absent present absent absent absent Abd. II chaeta a 2 p absent present present present absent present present present absent Abd. II chaeta m 3 e present present 3 / absent 4 absent absent present present present present present Abd. II chaeta m 5? M M M shM shM shM shM shM Abd. II ratio m 3 / m 5 ?? ~ 1.6 ~ 1.6 4 – 5 8? ~ 2.7 ~ 2.5 ~ 4.6 – 5.4 Abd. III chaeta a 7? cm cm cM sm 7 / cm 8 sm sm sm / cm 14 cm Abd. III chaeta d 3? present 3 / absent 4 present present present absent absent absent present Abd. IV chaeta m' absent absent absent absent absent absent / present absent absent / present 14 absent Abd. IV ratio D 1 / a ~ 1 2 ~ 1.5 ~ 1.5 ~ 1.3 ~ 1 ~ 1 ~ 1 ~ 1 ~ 1 Abd. IV C 1 p - T 3 - D 1 p smooth 2 smooth smooth smooth smooth 7 / ciliated 8 smooth / ciliated ciliated ciliated ciliated Abd. IV ratio D 1 p / T 3 ~ 1 2 ~ 1 ~ 1 ~ 1 ~ 1 7 / 1.4 – 1.9 8 ~ 2 ~ 2 ~ 2 1 – 1.4 Abd. IV F 2 cM cM cM cM cM? sm cM / sm 14 cM Abd. IV F 2 – E 2 F 2 be E 2 2 F 2 be E 2 F 2 be E 2 F 2 be E 2 F 2 be E 2? F 2 ab E 2 F 2 be / ab 14 E 2 F 2 be E 2 Dental tubercle absent absent present absent absent absent absent absent absent
Name
- Synonyms
- Lepidocyrtus arrabonicus sensu Traser 2000
- Lepidocyrtus isabellae sensu Winkler 2017
- Lepidocyrtus pseudosinelloides sensu Gisin 1967
- Lepidocyrtus serbicus sensu Gruia & Popa 2005
- Lepidocyrtus tomosvaryi sensu Winkler & Traser 2012
- Homonyms
- Lepidocyrtus pallidus Reuter 1890
- Lepidocyrtus pallidus Reuter 1890