Entomobrya acreanensis 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 acreanensis

description: Entomobrya acreanensis sp. nov. Viana & Cipola   
Figs 36–41, 72, Table 2  
 Type Material. Holotype female on slide (INPA-CLL 0000306): Brazil, Acre state, Manuel Urbano municipality, State Park of “Chandless”, T1-4500 grid, 09°24’43”S, 69°54’16”W (Fig. 72), 223 m, 05–13.x.2016, pitfall-trap, IPS Santos coll. Thirty five paratypes: 1 male on slide (INPA-CLL 0000307) and 4 specimens in alcohol (INPA-CLL 0000325–27): same date as holotype. One male on slide (INPA-CLL 0000308) and 2 specimens in alcohol (INPA-CLL 0000315–16): idem, except T1-1500 grid, 09°23’26”S, 69°55’15”W, 208 m. One male and 3 females on slides (INPA-CLL 0000309–312) and 7 specimens in alcohol (INPA-CLL 0000317–322): idem, except T1-2500 grid, 09°23’52”S, 69°54’58”W, 215 m. One specimens in alcohol (INPA-CLL 0000323–324): idem, except T1- 3500 grid, 09°24’17”S, 69°54’38”W, 225 m. One specimen in alcohol (INPA-CLL 0000328): idem, except T1-500 grid, 09°23’01”S, 69°55’37”W, 203 m. Two females on slides (INPA-CLL 0000313–314) and 1 specimen in alcohol (INPA-CLL 0000329): idem, except T2-2500, 09°23’29”S, 69°59’28”W, 212 m. One specimen in alcohol (INPA-CLL 0000330): idem, except T2-3500, 09°23’55”S, 69°54’14”W, 222 m. Four paratypes on slides (CC / UFRN), 1 female same date as holotype, 1 male and 1 female as T1-2500 grid, 09°23’52”S, 69°54’58”W, 215 m, and 1 male T2-2500 grid, 09°23’29”S, 69°59’28”W, 212 m. Three paratypes on slides (MNRJ), 2 males as holotype, except T1-2500 grid, 09°23’52”S, 69°54’58”W, 215 m, 1 female T1-500 grid, 09°23’01”S, 69°55’37”W, 203 m. Two paratypes on slides (MZUSP), 1 female T1-2500 grid, 09°23’52”S, 69°54’58”W, 215 m, 1 female T2-4500 grid, 09°24’21”S, 69°53’52”W, 234 m.   
 Other examined material. Three males and 1 female on slides and 3 specimens in alcohol (INPA): Brazil, Acre state, Rio Branco municipality, Zoobotanical Park of Federal University of Acre, 09°57’23”S, 67°52’16”W (Fig. 72), 170 m, 15–17.xii.2012, yellow plate-trap, SS Gadelha coll. One male and 1 female on slides (INPA): idem, except 14–15.xii.2012.   
 Diagnosis. Body entirely heavily or weakly pigmented with violet pigments, Abd IV dorsally with a knife-shaped paler (depigmented) area, coxa I–III and trochanter I–III pigmented, femur I–III sometimes with 1 distal spot, and manubrium pigmented on its proximal region (Figs 36A–D). Ant IV without the apical bulb; pl1–2 smooth and bifurcated (Fig. 37C); head macrochaetotaxy with 7–9 ‘ An ’, 3 ‘ A ’, 4–5 ‘ M ’, 8–9 ‘ S ’, 0–1 ‘ Ps ’, 3–4 ‘ Pa ’, 2 ‘ Pi ’, 2 ‘ Pm ’, 1–2 ‘ Pmp ’, 4 ‘ Pp ’, 1 ‘ Ppe ’ and 3 ‘ Pe ’ mac, respectively (Fig. 37D); labral inner papillae with 2–3 projections, outer with 2 small projections (Fig. 38A); labial papilla E l.p. conical and reaching the base of a.a. (Fig. 38B); Th II internally with 7–8 anterior, 5–8 median and 16–19 posterior mac; Th III–Abd I with 20–24 and 10–11 mac, respectively; Abd II–III with 3–4 and 0 inner mac, respectively; Abd IV with 14–21 inner and 22–26 outer mac (Figs 39A–C); unguiculus III ai lamella smooth and pe serrated (Fig. 40E); collophore anteriorly generally with 3 distal mac (Fig. 41A); dens distally with 2 rows of large modified chaetae (Fig. 41D); mucro proximal tooth larger than the distal one, basal spine surpassing the proximal tooth (Fig. 41D).   
 Description. Total length (head + trunk) of specimens 1.62–1.78 mm (n=4), holotype 1.62 mm. Specimens pale white with dark violet pigments on Ant IV distally, proximal and distal Ant III, proximal Ant I, body enterily heavily or weakly pigmented, except by small irregular depigmented regions on head and trunk, including Abd IV dorsally with a knife-shaped paler area; Abd V–VI depigmented centrally; coxa I–III and trochanter I–III pigmented with irregular spots; femur I–III depigmented or weakly pigmented, sometimes with 1 distal spot; collophore pigmented on its proximal region; manubrium entirely pigmented or weakly pigmented on its proximal region; eyepatches black (Figs 36A–D).   
 Head. Antenna subequal to the trunk length (Figs 36C and 36D), ratio antennae: trunk = 1.05–0.99: 1 (n=4), holotype 1.00: 1; antennal ratio as I: II: III: IV = 1: 1.50–1.60: 1.38–1.58: 2.05–2.29 (n=4), holotype 1: 1.60: 1.38: 2.26. Ant IV weakly annulated on its distal 3/4 and devoid of apical bulb, with 3 apical finger-shaped sens, and numerous sens of different sizes. Ant III organ with 2 sickle-shaped sens, 3 guard sens, 1 elongated sens and at least 8 sens of different sizes (Fig. 37A). Ant II dorsally with about 11 elongated sens, 5 dorsal and 4 ventral mac (Fig. 37B). Ant I dorsally with 2 elongated sens, 5 mac and 2–3 smooth mic at the base (Fig. 37B). Eyes A and B larger, G and H slightly smaller than the others, with 6 interocular mes (q, v, s, p, r, t); head dorsal chaetotaxy (Fig. 37D) with 7–9 ‘ An ’, 3 ‘ A ’, 4–5 ‘ M ’, 8–9 ‘ S ’, 0–1 ‘ Ps ’, 3–4 ‘ Pa ’, 2 ‘ Pi ’, 2 ‘ Pm ’, 1–2 ‘ Pmp ’, 4 ‘ Pp ’, 1 ‘ Ppe ’ and 3 ‘ Pe ’ mac, respectively. Clypeal formula with 4 (l1–2), 11 (f, 1 unpaired), 3 (pf0–1) ciliate chaetae, l1–2 longer and apically acuminate, 2 f and pf0–1 larger than the others, others subequal (Fig. 37C). Prelabral chaetae smooth, pl1 bifurcated equally or unequally, pl2 normal or bifurcated unequally (Fig. 37C). Labral inner papillae with 2–3 projections, outer papillae with 2 small projections (Fig. 38A). Labial papilla E l.p. conical-shaped and reaching the base of a.a. (Fig. 38B). Maxillary palp b.c. 1.05 longer than t.a.; sublobal plate with 3 inner appendages (sb1–3). Basolateral and basomedian labial fields with M1–2, R, E, L1–2 ciliate, M2 and R subtly smaller than the others, M2 present or absent. Cephalic groove with 10 ciliate chaetae of different sizes; postlabial formula with 4 (G1–4), 3 (X2, X, X4), 4 (H1–4) chaetae (Fig. 38C).   
 Thorax chaetotaxy (Fig. 39A). Th II a, m and p series (excluding the anterior collar) with 7–8, 5–8 and 16–19 mac, respectively. Th III a, m and p series with 6–8, 4 and 10–12 mac, respectively. Ratio Th II: III = 1.70–1.43: 1 (n=4), holotype 1.70: 1.   
 Abdomen chaetotaxy (Figs 39B–C). Abd I a, m and p series with 2, 7 and 0–2 mac, respectively. Abd II a, m and p series with 0–1, 5, and 2 mac, respectively, plus 2 extra mac. Abd III a, m and p series with 0–1, 3 and 1 mac, respectively, plus 2 extra mac or mes laterally. Abd IV with 15–21 inner mac of A–C series and 22–26 outer mac of T–Fe series, about 11 sens (ps type I and others type II), and 15 posterior mes. Abd V a, m, pa and p series with 3, 2–3, 1 and 4–5 mac, respectively. Ratio Abd III: IV = 1: 6.52–9.34 (n=4), holotype 1: 6.52.   
 Legs (Figs 40A–E). Subcoxa I with 3 chaetae and 2 psp; subcoxa II with an anterior row of 8 chaetae and about 14 anterior chaetae; posterior row of 4–7 chaetae, 0–1 anterior chaeta and 3 psp (Figs 40A–B); subcoxa III with one row of 8 chaetae, about 37 anterior chaetae and 2 psp. Trochanteral organ with 31 spine-like chaetae, 5 anterior, 4 posterior, 15 internal, 1 apical and 6 on the distal arm (Fig. 40D). Tibiotarsus I–III with 9 inner finely ciliate mac. Unguis b.t. on proximal 1/3, m.t. on distal 1/3 and subequal than b.t., a.t. minute and on distal 1/6. Unguiculus I–III lamellae (ae, ai, pe, pi) smooth and acuminate, except III pe serrated with 1 small proximal tooth; ratio unguis: unguiculus = 1: 0.50. Tibiotarsus III smooth chaeta 1.00 subequal to the unguiculus; tenent hair 0.47 smaller than the unguis (Fig. 40E).   
Collophore (Fig. 41A). Anterior side with about 24–29 ciliate chaetae, 3 distal mac and about 21–26 chaetae of different sizes widely distributed on the corpus; posterior side with about 70 ciliate chaetae of different sizes widely distributed on the corpus (8 unpaired), distally with 1 smooth chaeta; lateral flap with 10–19 chaetae, 6–7 smooth and 4–12 ciliate.  
 Furcula (Figs 41B–D). Manubrium ventrally with 2 subapical and about 45 distal ciliate chaetae of different sizes. Manubrial plate dorsally with 4–7 chaetae of different sizes and 2 psp. Dens dental lobe with 2 (bs1 and bs2) thicker ciliate chaetae, bs1 subequal to bs2. Dens tightly crenulate on 1/8; distally with 3 large modified chaetae on inner side, 1 inner chaeta distally larger than others. Mucro proximal tooth larger than the distal one, mucronal spine surpassing the apex of the proximal tooth.   
 Distribution. Known only from Acre state, Brazil (Fig. 72).   
 Etymology. Refers to the state where the species was collected, Acre (Fig. 72).   
 Remarks. Entomobrya acreanensis sp. nov. resembles E. albitrigona sp. nov. by densely pigmented body in some specimens (Figs 36A–D, 42A–B), Ant IV apical bulb absent (Fig. 43A), prelabral chaetae smooth and bifurcate (Figs 37C – 43C), labial papilla E l.p. conical (Figs 38B, 44B), overall dorsal macrochaetotaxy pattern (Figs 39A–C, 45A–C) and mucro proximal tooth larger than the distal one (Figs 41D, 47D). However, E. acreanensis sp. nov. sometimes has a dark violet body, except for the Abd IV anteriorly depigmented (or it can be weakly pigmented) (Figs 36A–D), while E. albitrigona sp. nov. has a depigment triangle-shaped region extendend from Th II to Abd IV anterior part (Figs 42A–B). Entomobrya acreanensis sp. nov. also differs by 2–3 projections on labral papillae (1 in E. albitrigona sp. nov.) (Figs 38A, 44A), unguiculus III ai lamella acuminate and pe serrated (ai slightly truncate and pe smooth in E. albitrigona sp. nov.) (Figs 40E, 46E), and manubrial plate with 4–7 ciliate chaetae and 2 psp (7–10 chaetae and 3 psp in E. albitrigona sp. nov.) (Figs 41C, 47C).   
 The head dorsal chaetotaxy of E. acreanensis sp. nov. differs by ‘ An ’ and ‘ M ’ series with 7–10 and 4–5 mac, respectively (6–7 and 2–3 in E. albitrigona sp. nov.) (Figs 37D, 43D), Th II a, m and p series with 7–8, 5–8 and 16–19 mac respectively (Th II 3–7, 5–6 and 12–19 mac in E. albitrigona sp. nov.), and Abd IV with 14–21 inner and 22–26 outer mac (15–20 inner and 10–13 outer in E. albitrigona sp. nov.) (Figs 39A–C, 45A–C). Other differences between these species are summarized in Table 2.
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 51-59, DOI: 10.11646/zootaxa.5452.1.1, http://zenodo.org/record/11232742