Lepidocyrtinus dayi ( Yosii, 1959 )

Cipola, Nikolas Gioia, Morais, José Wellington De & Bellini, Bruno Cavalcante, 2020, Review of Lepidocyrtinus Börner, 1903 (Collembola, Entomobryidae, Seirinae): the African species, Zootaxa 4898 (1), pp. 1-110 : 25-31

Lepidocyrtinus dayi ( Yosii, 1959)

Figs 2 , 18–22 , Tables 1 and 3

Seira (Lepidocyrtinus) dayi Yosii, 1959: 14 , Figs 7 A–G, South Africa, Cape Town, Skeleton Gorge.

Seira dayi ; Coates 1968: 454 (combination); Janion-Scheepers et al. 2015: 69, Africa South (catalog).

Typological note. The type material of L. dayi stat. nov. (Scheepers, personal communication) is probably lost. Thus, here its neotype is designated, according to ICZN (2000, chapter 16, article 72.4.5.), since the specimen fits all morphological characteristics presented in the original description and was collected from the type locality ( Fig. 2 ), Kirstenbosch, Cape Town.

Examined type material. Neotype female designed on slide ( SAM / IZIKO): South Africa, Cape Town, Ta-ble Mountain National Park, Kirstenbosch , 33°58’55.0”S, 18°25’25.0”E ( Fig. 2 ), Afrotemperate Forest , 400 m, 12.ii.2009, Pitfall trap, C Uys coll.

Other examined material. 2 females in slides ( INPA): same data as neotype . 1 female in slide and 1 specimens in alcohol ( INPA): South Africa, Cape Town, Table Mountain National Park, Orange Kloof , 34°00’12.3”S, 18°23’25.8”E, Afrotemperate Forest , 130 m, 28.i.2009, Sugar-baited Ant trap, C Uys coll. 6 specimens in alcohol ( CC / UFRN): Cecilia-Rooikat , 33°59’36.9”S, 18°25’11.0”E, in Fynbos, 430 m, 21.ii.2009, Sugar-baited Ant trap, C Uys coll. 4 females in slides and 11 specimens in alcohol ( CC / UFRN): Tokai , 34°03’54.3”S, 18°24’10.2”E, in Pine Plantation, 300 m, 19.i.2009, Sugar-baited Ant trap, C Uys coll.

Diagnosis. Body all dark blue but depigmented in dorsal head, few trunk parts, tibiotasus and dens distally ( Fig. 18 ); head mac A0, A2–3, A5, M1–2, S0–3, S5–6, Pa3, Pm3, Pp3 and Pp5 present, M4i as mac or mic; prelabral chaetae smooth; labial papilla E with l.p. apically pointed and surpassing the base of a.a. ( Figs 19B , D–E); Basolateral and basomedian labial fields with chaetae R, E, L1 ciliated, R subequal or slightly smaller than the others, l2 smooth; Th II not projected anteriorly and with 32–34 anterior, 9 median (m1ip, m4i–4p present) and 18–20 posterior mac (p2ep, p2ep2, p3 mac); Th III–Abd II with 11, 5, 3 central mac respectively; Abd IV with 11–12 central mac and 14 lateral mac ( Figs 20 , 21B ); unguis a.t. absent; unguiculus with pe lamella serrated and with small proximal tooth; collophore anteriorly with 5 spine-like chaetae and 3 ciliated chaetae apically acuminate, posteriorly without spines, smooth chaeta absent ( Fig. 22E ); manubrium ventrally with 0/2 subapical chaetae; manubrial plate without blunt mac; dens with 1 blunt mac apically nipple-like ( Figs 22 F–G).

Description. Total length (head + trunk) of specimens 2.20–2.55 (n=4). Specimens with dark blue pigments all over the body, except for posterior dorsal head, trunk intersegments membranae, Abd IV anteriorly, tibiotasus, and collophore and dens distally; eyepatches black ( Fig. 18 ). Scales present on Ant I to proximal half of Ant III, dorsal and ventral head, dorsal thorax and abdomen, legs (except empodia), anterior collophore, ventral and dorsal manubrium and dens ventrally.

Head. Antennae smaller to trunk length; ratio antennae: trunk = 1: 1.98 (n=1); antennal segments ratio as I: II: III: IV = 1: 1.42: 1.83: 2.14. Ant IV annulated on distal fourth-fifths, apical bulb apically bilobed. Ant III annulated on distal half, apical organ with 2 rods, 3 spiny guard sens, s-blunt sens of different sizes and ciliated chaetae. Ant I dorsally with 1 inner mac and 3 smooth mic at base, without spines ( Fig. 19A ). Eyes A, B and C larger, G and H smaller, others subequal, and with 5 ‘IO’ chaetae; head dorsal macrochaetotaxy with 9–10 An, 4 A, 3–4 M, 7 S, 1 Pa, 1 Pm and 2 Pp mac ( Fig. 19E ). Clypeal formula with 4 (l1–2), 4 (ft), 3 (pf0–1) ciliated chaetae, l1–2 larger than others and apically acuminate, 1 ft smaller, others subequal. Prelabral chaetae smooth and not bifurcated. Labral p0 chaeta generally with median filament ( Fig. 19B ). Labral inner and outer papillae rounded, not projected ( Fig. 19C ). Maxillary palp with smooth t.a. and b.c. weakly ciliated, thicker and 1.13 longer than the t.a. Labial papilla E with l.p. apically pointed and surpassing the base of a.a. ( Fig. 19D ). Basolateral and basomedian labial fields with chaetae M1–2, R, E, L1 ciliated, R subequal or slightly smaller than others, l2 smooth. Ventral head with about 30–31 ciliated chaetae, postlabial formula with 4 (G1–4), 3 (H2–4), 4 (J1–4) chaetae, about 14 thin posterior chaetae with different lengths, and 1 larger b.c. surrounding the cephalic groove ( Fig. 19F ).

Thorax chaetotaxy ( Fig. 20 A–B). Th II not projected anteriorly, a, m and p series with 32–34, 9 and 18–20 mac, respectively. Th III a, m and p series with 4, 1 and 8 mac, respectively. Ratio Th II: III = 1.95–1.26: 1 (n=4).

Abdomen chaetotaxy ( Figs 20 C–D, 21A–C). Abd I a, m and p series with 1, 4 and 0 mac, respectively. Abd II a, m and p series with 1, 3 and 0 mac, respectively, m3e absent. Abd III a, m and p series with 0, 3 and 1 mac, respectively. Abd IV with 11–12 central mac on A–T series and 14 lateral mac on E– Fe series; at least 9 sens (ps type I, others type II) and 10 posterior mes. Abd V a, m and p series with 1, 3 and 5 mac, respectively. Ratio Abd III : IV = 1: 4.26–5.25 (n= 4).

Legs. Subcoxa I with 5 chaetae, 1 anterior chaeta present or absent and 2 psp; subcoxa II with an anterior row of 11–12 chaetae, posterior row of 6 chaetae and 4 psp; subcoxa III with one row of 13 chaetae, 3 anterior chaetae and 2 posterior psp ( Fig. 22 A–C). Trochanteral organ with about 38 spine-like chaetae ( Fig. 22D ). Tibiotarsus not subdivided, modified chaetae absent. Unguis with 3 inner teeth, b.t. subequal to m.t. in length, a.t. absent. Unguiculus with all lamellae smooth and acuminate, except pe serrated and with a small proximal tooth.

Collophore. Anterior side with 18–19 chaetae, 5 proximal spine-like chaetae, 1 thin and 7–8 normal ciliated chaetae, 3 ciliated chaetae apically acuminate and 2 mac distally; posterior side with 15 chaetae, 13 thin ciliated chaetae widely distributed and 2 ciliated chaetae distally; lateral flap with about 30–31 chaetae, 4–5 smooth and 26 ciliated ( Fig. 22E ).

Furcula. Manubrium ventral formula with 1, 2, 2, 0/2 (subapical), 12–20 (apical) ciliated chaetae plus approximately 16 elongated apical scales per side ( Fig. 22F ); manubrial plate with 5 mac ciliated and apically acuminate (no blunt), 7–11 ciliated chaetae of different sizes and 3 psp. Dens dorsally with 1 proximal blunt mac finely ciliated and apically nipple-like ( Fig. 22G ).

Remarks. Lepidocyrtinus dayi resembles L. barnardi (see the remarks of this species and Tables 3 and 4 ).

Figures

FIGURE 2. Map of Lepidocyrtinus species recorded from continental Africa analysed in this study, including the type locality (red star) of L. annulicornis.

FIGURE 7A–D. Lepidocyrtinus sp.: legs; A, trochanter III (inner side), arrows indicate small spines on outer side; B, empodial complex I (anterior side in laterodorsal view), green arrow indicates the pair of large lateral teeth, red arrow unpaired basomedi- an teeth, white arrows unguiculus lamellae; C, empodial complex II (posterior side in lateral view), b.t. is the pair of basal teeth (anterior and posterior) and m.t. median tooth, arrow indicate small tooth on pe lamella of unguiculus; D, empodial complex III (posterior side in lateral view); green arrow indicates inner smooth chaeta, red arrow indicate minute pretarsal chaeta, and white arrow small tooth on pe lamella of unguiculus. Scale bars: A–D (0.02 mm).

FIGURE 18. Lepidocyrtinus dayi, habitus of a specimen fixed in alcohol (lateral view), Ant IV missing. Scale bars: 1 mm.

FIGURE 19A–F. Lepidocyrtinus dayi: head; A, left Ant I chaetotaxy (dorsal side); B, chaetotaxy of the clypeus, prelabral and labral posterior row; C, labral papillae (ventral side); D, labial papillae E (right side), arrow indicates l.p.; E, dorsal chaetotaxy (left side); F, complete postlabial chaetotaxy (right side).

FIGURE 20A–D. Lepidocyrtinus dayi: dorsal chaetotaxy; A, Th II; B, Th III; C, Abd I; D, Abd II.

FIGURE 21A–C. Lepidocyrtinus dayi: dorsal chaetotaxy; A, Abd III, B, Abd IV; C, Abd V.

FIGURE 22A–G. Lepidocyrtinus dayi; A–C, subcoxa I–III (outer side), respectively; D, trochanteral organ (inner side); E, collophore chaetotaxy (lateral view); F, manubrium ventral chaetotaxy; G, chaetotaxy of the manubrial plate and proximal dens (lateral view).