Entomobrya bicyana Viana & Morais & Cipola 2024, sp. nov.
Creators: name: Viana, Stéphanie Dos Santos
name: Morais, José Wellington De
name: Cipola, Nikolas Gioia
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Collembola
Entomobryomorpha
Entomobryidae
Entomobrya
Entomobrya bicyana

description: Entomobrya bicyana sp. nov. Viana & Cipola   
Figs 48–53, 72, Table 3  
 Type Material. Holotype male on slide (INPA-CLL 0000354): Brazil, Tocantins state, Palmas municipality, Ecological farm of “Taquaruçu”, 10°15’S, 48°08’W (Fig. 72), 619 m, 13–20.v.2013, pitfall-trap, AS Lopes coll. Thirty four paratypes: 5 males and 8 females on slides and 9 specimens in alcohol (INPA-CLL 0000355-368), 1 male and 4 females on slides (CC / UFRN), 4 females on slides (MNRJ), and 3 females on slides (MZUSP), same date as holotype.   
 Other examined material. One male on slide (ABAM / UFMT): Mato Grosso state, Santa Cruz do Xingu municipality, State Park of “Xingu”, 09°51’22.50”S, 52°29’23.00”W (Fig. 72), 273 m, 11–13.ii.2021, pitfall-trap, I Fagner & M Penhavek coll.   
 Diagnosis. Dark blue pigments on head, Th II to Abd I, distal 2/3 of Abd IV, Abd V with a thin transverse band of pigment (Figs 48A–B); Ant IV with a bilobed apical bulb (Fig. 49A); pl1–2 chaetae weakly serrated (Fig. 49D); head macrochaetotaxy with 5–6 ‘ An ’, 4 ‘ A ’, 3–4 ‘ M ’, 7–8 ‘ S ’, 1 ‘ Ps ’, 4 ‘ Pa ’, 2 ‘ Pi ’, 2 ‘ Pm ’, 1 ‘ Pmp ’, 4 ‘ Pp ’, 1 ‘ Ppe ’ and 4 ‘ Pe ’ mac, respectively (Fig. 50A); labral papillae apically rounded, inner eventually truncate (Fig. 50B); labial papilla E l.p. finger-shaped and almost reaching the base of a.a. (Fig. 50C); Th II internally with 6–7 anterior, 2–3 median and 13–16 posterior mac; Th III–Abd I with 21–27 and 9–12 mac, respectively; Abd II–III with 4–5 and 1–2 inner mac, respectively; Abd IV with 6–10 inner and 13–16 outer mac (Figs 51A–C); unguiculus III ai and pi lamellae excavate, pe serrated (Fig. 52E); collophore anteriorly with 3 distal mac (Fig. 53A); dens distally only with regular chaetae; mucro proximal tooth larger than the distal one, basal spine surpassing the apex of the proximal tooth (Fig. 53D).   
 Description. Total length (head + trunk) of specimens 1.00– 1.52 mm (n=4), holotype 1.00 mm. Specimens pale white to yellowish with dark blue pigments on head, Th II to Abd I entirely, distal 2/3 of Abd IV, Abd V with a thin transverse band of pigment; coxa I–III and collophore (except for the distal region) completely pigmented. Ant II proximal region and Abd VI with weak bluish pigments, eyepatches black (Figs 48A–B).   
 Head. Antenna shorter than the trunk length (Fig. 48B), ratio antennae: trunk = 0.57–0.84: 1 (n=3), holotype 0.77: 1; antennal ratio as I: II: III: IV = 1: 1.01–1.88: 1.34–1.83: 2.08–2.88 (n=4), holotype 1: 1.63: missing: 2.88. Ant IV weakly annulated on its distal 3/4, distally with a bilobed apical bulb, 1 lateral pin projection, at least 3 apical finger-shaped sens, and numerous sens of different sizes (Fig. 49A). Ant III sense organ with 2 finger-shaped sens, 3 guard sens and numerous sens of different sizes (Fig. 49B). Ant II dorsally with about 2 inner elongated sens, 3 dorsal and 2 ventral mac (Fig. 49C). Ant I dorsally with 4 mac and 3 smooth mic at the base, without elongated sens (Fig. 49C). Eyes A and B larger, G and H slightly smaller than the others, with 4 interocular mes (v, s, p, t); head dorsal chaetotaxy (Fig. 50A) with 5–6 ‘ An ’, 4 ‘ A ’, 3–4 ‘ M ’, 7–8 ‘ S ’, 1 ‘ Ps ’, 4 ‘ Pa ’, 2 ‘ Pi ’, 2 ‘ Pm ’, 1 ‘ Pmp ’, 4 ‘ Pp ’, 1 ‘ Ppe ’ and 4 ‘ Pe ’ mac, respectively. Clypeal formula with 4 (l1–2), 10 (f), 5 (pf0–2) ciliate chaetae, l1–2 longer and ciliate, apically acuminate, 4 f and pf2 smaller than the others, others subequal (Fig. 49D). Prelabral chaetae weakly serrated (Fig. 49D). Four apically rounded labral papillae, inner papillae slightly truncated (Fig. 50B). Labial papilla E l.p. finger-shaped and almost reaching the base of a.a. (Fig. 50C). Maxillary palp b.c. 1.05 longer than t.a. Basolateral and basomedian labial fields with M1–2, R, E, L1–2 ciliate, M2 and R subtly smaller than the others, both present or absent. Cephalic groove with 8 ciliate chaetae of different sizes; postlabial formula with 4 (G1–4), 3 (X2–4), 4 (H1–4) chaetae (Fig. 50D).   
 Thorax chaetotaxy (Fig. 51A). Th II a, m and p series (excluding the anterior collar) with 6–7, 2–3 and 13–16 mac, respectively. Th III a, m and p series with 7–9, 4–5 and 10–13 mac, respectively. Ratio Th II: III = 1.79–1.06: 1 (n=4), holotype 1.65: 1.   
 Abdomen chaetotaxy (Figs 51B–C). Abd I a, m and p series with 2–3, 6–8 and 1 mac, respectively. Abd II a, m and p series with 1–2, 4 and 0 mac, respectively, plus el mac present. Abd III a, m and p series with 2, 3–4 and 1–2 mac, respectively, plus 3 extra mac or mes laterally.Abd IV with 6–10 inner mac of A–C series and 13–16 outer mac of T–Fe series; about 11 sens (ps type I and others type II) and 9 posterior mes. Abd V a, m, pa and p series with 4, 3, 2 and 4–6 mac, respectively. Ratio Abd III: IV = 1: 4.05–6.57 (n=4), holotype 1: 5.90.   
 Legs (Figs 52A–E). Subcoxa I with 3 chaetae and 2 psp; subcoxa II with an anterior row of 7–8 chaetae and about 12 anterior chaetae; posterior row of 5 chaetae, 1 anterior and posterior chaeta and 2 psp; subcoxa III with one row of 8 chaetae, about 14 anterior chaetae and 2 psp (Figs 52A–B). Trochanteral organ with 18 spine-like chaetae, 4 anterior, 3 posterior, 6 internal, 1 apical and 4 on the distal arm (Fig. 52C). Tibiotarsus I–III with 6 inner finely ciliate mac. Unguis b.t. on proximal 1/3, m.t. on distal 1/3 and smaller than b.t., a.t. minute and on distal 1/7. Unguiculus I–III lamellae (ae, ai, pe, pi) smooth and acuminate, except unguiculus I and III ai and pi excavate, only unguiculus III pe serrated. Ratio unguis: unguiculus = 1: 0.61. Tibiotarsus III smooth chaeta 1.06 longer than the unguiculus; tenent hair 1.23 larger than the unguis (Figs 52D–E).   
Collophore (Fig. 53A). Anterior side with about 13 ciliate chaetae, 3 distal mac and about 10 chaetae of different sizes widely distributed on the corpus; posterior side with about 19 ciliate chaetae of different sizes widely distributed on the corpus (3 unpaired) and distally with 1 smooth chaeta; lateral flap with 11–12 chaetae, 7 smooth and 4–5 ciliate.  
 Furcula (Figs 53B–D). Manubrium ventrally with 2 subapical and about 10 distal ciliate chaetae of different sizes. Manubrial plate dorsally with 5 chaetae of different sizes and 3 psp (Fig. 53C). Dens dental lobe with 2 (bs1 and bs2) thicker ciliate chaetae, bs1 subequal to bs2. Dens tightly crenulate on its distal 1/4; distally only with regular chaetae. Mucro proximal tooth larger than distal one, mucronal spine surpassing the proximal tooth apex (Fig. 53D).   
 Distribution. Known from Tocantins and Mato Grosso State, Brazil (Fig. 72).   
 Etymology. Refers to the two blue pigmented regions of the body (Figs 48A–B) present in new species (from Latin: bi —two, and from Greek: cyano —blue).   
 Remarks. Entomobrya byciana sp. nov. resembles E. ataquensis Arlé, 1959 from Serra da Mantiqueira (Minas Gerais and São Paulo states), by body almost completely pigmented (Figs 48A–B), Ant IV apical bulb present (Fig. 49A), and unguiculus ai lamella excavate (Figs 52D–E). However, E. bicyana sp. nov. differs from this species by And II to Abd IV with a depigmented transverse band (Figs 48A–B), while E. ataquensis has the body almost completely pigmented (sometimes Abd IV–VI depigmented). The new species also differs by Ant IV bilobed apical bulb (Fig. 49A) (unilobed on E. ataquensis), unguiculus III pe lamella serrated (smooth in E. ataquensis), and proximal mucronal tooth larger than the apical one (subequal in E. ataquensis) (Figs 52D–E). Other differences between these species are summarized in Table 3.
description: Published as part of Viana, Stéphanie Dos Santos, Morais, José Wellington De & Cipola, Nikolas Gioia, 2024, Taxonomic revision of Entomobrya Rondani, 1861 (Collembola: Entomobryidae: Entomobryinae) from the Brazilian Amazon, pp. 1-110 in Zootaxa 5452 (1) on pages 66-71, DOI: 10.11646/zootaxa.5452.1.1, http://zenodo.org/record/11232742