Lepidocyrtinus paucisensillum, Cipola & Morais & Bellini, 2020

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: 55-61

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Lepidocyrtinus paucisensillum

sp. nov.

Lepidocyrtinus paucisensillum   sp. nov. Cipola & Bellini

Figs 2 View FIGURE 2 , 45–49 View FIGURE 45 View FIGURE 46 View FIGURE 47 View FIGURE 48 View FIGURE 49 , Tables 1 View TABLE 1 and 3

Type Material. Holotype female on slide ( NHMLA): Republic of the Congo, Poll Departament , Nagbe, LesioLouna Reserve, 03°16’S, 15°28’E ( Fig. 2 View FIGURE 2 ), 18.viii.2008, Malaise trap, B Brown coll. 3 paratypes on slides: 1 male and 1 female ( NHMLA), plus 1 female ( INPA-CLL 000036), same data as holotype. GoogleMaps  

Diagnosis. Body with dark blue pigments on Ant II–III internally and posterior head to coxa I and Th II laterally ( Fig. 45 View FIGURE 45 ); head mac A0, A2–3, A5, M1–2, S0–3, S5–6 and Pp5 present; prelabral chaetae ciliated; labial papilla E with l.p. apically finger-shaped and reaching the base of a.a. ( Figs 46 View FIGURE 46 D–E); basolateral and basomedian labial fields with chaetae R (subequal to others), E, L1–2 ciliated; Th II projected anteriorly and with 13–14 anterior, 7 median (m4–4p present, m1ip and m4i mac absent) and 11 posterior mac (p2ep mac, p3 mic); Th III–Abd II with 8–9, 5, 3–4 central mac respectively; Abd IV with 16–18 central mac and 12–13 lateral mac ( Figs 47 View FIGURE 47 , 48B View FIGURE 48 ); unguis a.t. present; unguiculus pe lamella serrated and with a small proximal tooth; collophore anteriorly with 12 spine-like chaetae and 4 ciliated chaetae apically acuminate, posteriorly without spines, smooth chaeta present ( Fig. 49E View FIGURE 49 ); manubrium ventrally with 2/2 subapical chaetae; manubrial plate with 3 blunt mac abruptly acuminate at the apex; dens with 9 blunt mac apically nipple-like ( Figs 49 View FIGURE 49 F–G).

Description. Total length of body (head + trunk) 2.44–4.32 mm (n=4), holotype 4.32 mm. Specimen pale white with dark blue pigments present on inner side of the Ant I–III forming a longitudinal strip, posterolateral dorsal head, Th II lateral margin and all coxa I. Light blue pigments present on Th III laterally and femur III distally; eyepatches dark ( Fig. 45 View FIGURE 45 ). Scales present on Ant I to proximal half of Ant III, ventral and dorsal head, dorsal thorax and abdomen, legs (except empodium), anterior collophore, ventral and dorsal manubrium and dens ventrally.

Head. Ant IV missing in all specimens, antennae probably subequal or smaller than the trunk length ( Fig. 45 View FIGURE 45 ); ratio antennae: trunk = 1: 1.56–2.23 (n=3), holotype 1: 2.23 (Ant IV missing); antennal segments ratio as I: II: III = 1: 1.25–1.37: 2.26–2.65, holotype 1: 1.29: 2.28. Ant III annulated on distal three fourths, apical organ with 2 clubshaped sens, 3 spiny guard sens and s-blunt sens of different sizes ( Fig. 46A View FIGURE 46 ). Ant I dorsally with 5 median mac and 5 smooth mic at base, without spines ( Fig. 46B View FIGURE 46 ). Eyes A and B slightly larger, G and H smaller, others subequal, and with 5 ‘IO’ chaetae; head dorsal macrochaetotaxy with 10 An, 4 A, 3 M, 7 S, 1 Ps and 1 Pp mac ( Fig. 46E View FIGURE 46 ). Clypeal formula with 4 (l1–2), 2 (ft), 3 (pf0–1) ciliated chaetae, l1–2 larger than others, l1 apically acuminate, others subequal ( Fig. 46C View FIGURE 46 ). Prelabral chaetae ciliated and not bifurcated. Labral p0–1 larger than the others, p0 without median filament. Labral papillae with two inner conical projections, outer papillae absent. Maxillary palp with smooth t.a. and b.c. weakly ciliated, thicker and 1.14 longer than the t.a. Labial papilla E with l.p. finger-shaped and reaching the base of a.a. ( Fig. 46D View FIGURE 46 ). Basolateral and basomedian labial fields with chaetae M1–2, R (subequal to others), E, L1–2 ciliated. Ventral head with about 23 ciliated chaetae, postlabial formula with 4 (G1–4), 3 (H2–4), 3 (J1–3) chaetae (H2 and J2 larger than the others), 7 thin posterior chaetae, and 3 larger chaetae, 1 b.c. surrounding the cephalic groove ( Fig. 46F View FIGURE 46 ).

Thorax chaetotaxy ( Fig. 47 View FIGURE 47 A–B). Th II projected anteriorly, a, m and p series with 13–14, 7 and 11 mac, respectively. Th III a, m and p series with 2, 1 and 7–8 mac, respectively. Ratio Th II: III = 1.81–1.69: 1 (n=4), holotype   1.81: 1.

Abdomen chaetotaxy ( Figs 47 View FIGURE 47 C–D, 48A–C). Abd I a, m and p series with 1, 4 and 0 mac, respectively. Abd II a, m and p series with 1, 3–4 and 0 mac, respectively. Abd III a, m and p series with 0, 3 and 1 mac, respectively. Abd IV with 16–18 central mac on A– T series and 12–13 lateral mac on E– Fe series; at least 4 posterior sens (ps type I, others type II) and 9 posterior mes. Abd V a, m and p series with 1, 4 and 6 mac, respectively. Ratio Abd III: IV = 1: 3.64–4.98 (n= 4), holotype   1: 4.98.

Legs. Subcoxa I with 7 chaetae on a row and 2 psp; subcoxa II with an anterior row of 13 chaetae, posterior row of 5 chaetae, plus 1 extra chaeta and 7 psp; subcoxa III with one row of 12 chaetae and 2 posterior psp ( Fig. 49 View FIGURE 49 A–C). Trochanteral organ with about 63 spine-like chaetae ( Fig. 49D View FIGURE 49 ). Tibiotarsus sometimes subdivided on distal two thirds, outer side with 4 larger ciliated chaetae apically acuminate, inner side with 6 mac weakly ciliated. Unguis with 4 inner teeth, b.t. subequal to m.t. in length, a.t. smaller. Unguiculus with all lamellae smooth and acuminate, except pe serrated and with a small proximal tooth; ratio unguis: unguiculus = 1: 0.65. Tibiotarsal smooth chaeta 0.83 smaller than unguiculus and tenent hair 0.86 smaller than unguis outer edge.

Collophore. Anterior side with 22 chaetae, 12 proximal spine-like chaetae, 3 ciliated chaetae, 5 ciliated chaetae apically acuminate and 2 mac distally; posterior side with 11 chaetae, 9 thin ciliated chaetae widely distributed and 1 ciliated and 1 smooth chaetae distally; lateral flap with about 42 chaetae, 11 smooth and 31 ciliated ( Fig. 49E View FIGURE 49 ).

Furcula. Manubrium ventral formula with 1, 2 2, 2/2 (subapical), 2/16 (apical) ciliated chaetae of different sizes plus approximately 15 elongated apical scales per side ( Fig. 49F View FIGURE 49 ); manubrial plate with 3 blunt mac weakly ciliated abruptly acuminate at the apex, 6 ciliated chaetae of different sizes and 3 psp. Dens dorsally with 9 blunt mac finely ciliated and apically nipple-like ( Fig. 49G View FIGURE 49 ).

Etymology. The name of new species, paucisensillum   , refers to the few (from Latin: pauci) sensilla seen in Abd IV.

Remarks. Lepidocyrtinus paucisensillum   sp. nov. resembles L. ryozoi   nom. nov. in Th II with 5 central mac in m1–2 group, Th III to Abd II with 9, 5, 4 central mac, respectively, unguis a.t. present and dens with at least 9 blunt mac ( Table 3). However, L. paucisensillum   differs from this species by dark blue pigments on Ant II–III internally and on posterior head to coxa I and Th II laterally ( Fig. 45 View FIGURE 45 ), while in L. ryozoi   there are pigments on all Ant III–IV, and distally on femur and tibiotarsus I–III (see Yosii 1959). In chaetotaxy they differ by Th II with p3 mic and Th III without p1p2 mac (opposite in L. ryozoi   ), in Abd IV with 6–7 (anterior), 4 (median) and 6–7 (posterior) central mac (8, 5 and 4 in L. ryozoi   ), and manubrial plate with 3 blunt mac abruptly acuminate at the apex (apically nipple-like in L. ryozoi   ) ( Figs 12 View FIGURE 12 A–B, D, 47A–B, 48B, 49G).


Tavera, Department of Geology and Geophysics


Royal British Columbia Museum - Herbarium