Entomobrya egleri Arle & Guimaraes 1978
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 egleri

description: Entomobrya egleri Arlé & Guimarães, 1978   
Figs 12–20, Table 2  
 Entomobrya egleri Arlé & Guimarães, 1978: 12, figs 24–30, Brazil, Pará state, Santo Antônio de Tauá municipality [currently “Santo Antônio do Tauá”] (original description).   
 Typological note. The type material of E. egleri deposited at MNRJ was destroyed in the fire of September 2018, while the paratypes deposited at MPEG were lost (Orlando T. Silveira, personal communication). The neotype is herein designated from specimens collected near to the type locality (Fig. 20), according to ICZN (2000) (see chapter 16, article 75.3.4, 75.3.6, and article 76). The specimens fit all morphological characteristics presented in the original description (Arlé & Guimarães 1978).   
 Examined type material. Neotype male designed on slide (INPA-CLL 0000273): Brazil, Pará state, Ananindeua municipality, “Águas Lindas” neighborhood, forest of “Jerusalém” street, 01°23’58”S, 48°22’35”W (Fig. 20), 25 m, 13–15.viii.2021, pitfall-trap, SS Viana coll.   
 Other examined material. One specimen in alcohol (INPA): same date as neotype except, 01°23’59”S, 48°22’39”W, 35 m. One specimen in alcohol (INPA): idem, except “ Águas Brancas ” neighborhood, “II de Junho ” street, “ Jardim Amazônia II” condominium, 01°23’24.1”S, 48°22’25.1”W (Fig. 20), 23 m, 27–29.iv.2021. One male and 1 female on slides and 2 specimens in alcohol (INPA): Belém municipality, “Guamá” neighborhood, forest of Federal University of Pará, 01°28’02”S, 48°26’40”W, 10 m, 05–07.i.2022, pitfall-trap, GC Tavares coll. One specimen in alcohol (INPA): idem, except Museu Paraense Emílio Goeldi, 01°27’07”S, 48°26’38”W, 9 m, 97– 13.i.2014, RS Sovano coll. One female on slide (INPA): Belterra municipality, National forest of “Tapajós”, “Pini” stream, 03°07’47.6”S, 55°06’39.0”W, 33 m, 16–21.ix.2016, malaise-trap, AMO Pes, G Amora & GD Gomes coll. One female on slide and 1 specimen in alcohol (INPA): idem, except Rurópolis municipality, “Luz” stream, 03°59’24.1”S, 54°53’24.6”W, 75 m, 15–23.ix.2016. One female and 1 juvenile on slides and 3 specimens in alcohol (INPA): idem, except waterfall of “ Grin ”, near to “ BR 163 ” road, 04°05’40.61”S, 55°00’53.29”W, 70 m, 05– 06.xi.2012, pitfall-trap, JMC Nascimento coll. One female on slide (INPA): idem, except 04°06’09.9”S, 54°58’53.3”W, 102 m, 06–07.x.2012. One male and 3 females on slides and 12 specimens in alcohol (INPA): Capitão Poço municipality, Ecological reserve of “São Geraldo Magela”, 01°47’57.47”S, 47°05’32.94”W, 73 m, 07–27.ix.2019, malaise-trap, FJ Sosa coll. Two specimens in alcohol (INPA): idem, except 14–21.vii.2019. One male and 2 females on slides (INPA): Marajó island, Soure municipality, Extractive reserve of “Marinha de Soure”, 00°41’38.48”S, 48°33’19.00”W, 15 m, 18–24.i.2020, malaise-trap, JJ Corrêa-Neto coll. Six specimens in alcohol (INPA): idem, except 00°35’29.36”S, 48°32’51.07”W, 18 m. One male on slide and 1 specimen in alcohol (INPA): idem, except 00°37’21.02”S, 48°36’32.54”W, 16 m, 07–12.iii.2020. One specimen in alcohol (INPA): idem, except 00°38’52.29”S, 48°29’23.88”W, 26 m, 20–26.iii.2020. One specimen in alcohol (INPA):idem, except 00°39’12.88”S, 48°32’43.37”W, 18 m, 27.xi–03.xii.2020. 1 female on slide (INPA): idem, except 00°40’47.34”S, 48°36’01.07”W, 18 m, 02–08.ii.2020. One male on slide and 6 specimens in alcohol (MPEG): Melgaço municipality, National Forest of “Caixuanã”, “Ferreira Penna” scientific station (ESECAFLOR), 01°43’35”S, 51°26’36”W, 45 m, iv.2012, pitfall-trap, DA Cunha coll. Two females on slides and 2 specimens in alcohol (INPA): Santarém municipality, Alter do Chão district, “Norato” island, 02°30’00.0”S, 54°57’00.0”W, 2 m, 27.iv.2002, pitfall-trap, D Rodrigues coll. One juvenile on slide (INPA): Acre state, Mâncio Lima municipality, National park of “Serra do Divisor”, near to “Cachoeirinha” stream, affluent of river “Môa”, 07°29’42.6”S, 73°41’55.9”W, 253 m, 20–26.vii.2022, pitfall-trap, HLMS Ferreira coll. Six specimens in alcohol (INPA): Manoel Urbano municipality, State Park of “Chandless”, 09°24’43”S, 69°54’16”W, 223 m, 05–13.x.2016, pitfall-trap, IPS Santos coll. Two specimens in alcohol (INPA): idem, except 09°22’40”S, 69°55’12”W, 212 m. Two males on slides (INPA): idem, except 09°23’01”S, 69°55’37”W, 203 m. One specimen in alcohol (INPA): idem, except 09°23’55”S, 69°54’14”W, 222 m. Three males on slides and 8 specimens in alcohol (INPA): Rio Branco municipality, Zoobotanical Park of Federal University of Acre, 09°57’23”S, 67°52’16”W, 170 m, 17–19.xii.2012, yellow plate-trap, SS Gadelha coll. Two specimens in alcohol (INPA): idem, except 15–17.xii.2012. One specimen in alcohol (INPA): idem, except 14–19.xii.2012, malaise-trap. One female in slide (INPA): Senador Guiomard municipality, “São Francisco” farm, near to “BR-317” road, 10°05’43”S, 67°34’24”W, 207 m, 13–27.vii.2014, malaise-trap, DRR Fernandes & DF Nogueira coll. One female in slide (INPA): Amazonas state, Benjamin Constant municipality, “BR-307” road, km 10, 04°26’09.1”S, 70°05’18.1”W, 90 m, 08–10.iv.2014, malaise-trap, A Plant, JT Câmara, FF Xavier & Gil Miranda coll. Two females on slides and 3 specimens in alcohol (INPA): Canutama municipality, Extractive Reserve “Canutama”, “Purus” river, 06°32’S, 64°22’W, 44 m, 01–10.iv.2013, malaise-trap, A Somavilla & M Oliveira coll. One male on slide (INPA): Careiro Castanho municipality, Reserve of “Programa de Pesquisa em Biodiversidade-PPBIO”, “AM-354” road, 03°40’42”S, 60°19’41”W, 29 m, 11–13.xii.2013, malaise-trap, JA Rafael, JT Câmera & FF Xavier coll. One female on slide (INPA): Manaus municipality, “Embrapa Amazônia Ocidental”, in cultivation of organic Guaraná, 02°53’29.14”S, 59°58’45.80”W, 97 m, 28.ix.2012, Möerick-trap, K Schoeninger coll. One specimen in alcohol (INPA): idem, except forest near to cultivation of conventional Guaraná, 02°53’42.18”S, 59°59’10.58”W, 14.ix.2012. Two males on slides and 2 specimens in alcohol (INPA): forest of the INPA, “ Bosque da Ciência ”, 03°05’54”S, 59°59’09”W, 94 m, i.1991 – xii.1994, pitfall-trap, C Martius coll. Two males on slides and 3 specimens in alcohol (INPA): idem, except 21.v.2012, P Bartholomay coll. Three specimens in alcohol (INPA): idem, except 26–31. vii.2012, NG Cipola coll. One female on slide (INPA): idem, except 12.v.2014, suspended-trap, R Klepper coll. Two females on slides and 13 specimens in alcohol (INPA): forest of the INPA, “campus II”, 03°05’48”S, 59°59’23”W, 78 m, 31-viii–13.ix.2021, malaise-trap, E Viegas & M Soares coll. Four specimens in alcohol (INPA): idem, except 03°05’49”S, 59°59’19”W, 93 m, 01–03.vi.2013, GC Tavares coll. One juvenile of 1 st instar, 2 juveniles in 2 nd instar, 1 juvenile in 3 rd instar, 1 juvenile in 4 th instar, 1 juvenile in 5 th instar, 2 juveniles in 6 th instar and 1 male and 2 female subadult, all on slides and 9 specimens in alcohol, 3 in each institution (CC / UFRN, MNRJ, MZUSP): idem, except 12–15.viii.2022, pitfall-trap, NG Cipola & SS Viana coll. Four specimens in alcohol (INPA): Federal University of Amazonas, 3°05’59”S, 59°58’17”W, 83 m, 22–27.viii.2012, pitfall-trap, MBCS Graça & NG Cipola coll. One specimen in alcohol (INPA): Manicoré municipality, State Park “Matupiri”, “BR-319” road, 04°59’2.39”S, 61°34’30.00”W, 40 m, vii.2008, winkler-trap, JS Araújo & FB Baccaro coll. Two males on slides and 4 specimens in alcohol (INPA): Nova Olinda do Norte municipality, “Terra Preta” thorp, near to “Abacaxis” river, 04°22’27.4”S, 58°38’34.4”W, 40 m, 22–24.v.2019, möerick-trap, PCS Barroso coll. One specimen in alcohol (INPA): Novo Airão municipality, National Park of “Anavilhanas”, “Santo Antônio” community, 02°43’53.0”S, 60°49’31.8”W, 25 m, 11–12.vi.2016, white plate-trap, DD Silva coll. Two females on slides and 1 specimen in alcohol (INPA): Presidente Figueredo municipality, “AM-270” road margin, km 18, 02°02’48”S, 59°52’01”W, 143 m, 30.viii.2014, plate-trap, NG Cipola & FGL Oliveira coll. Three specimens in alcohol (INPA): idem, except “ Mutum ” waterfall, near to entrance, 01°58’05.4”S, 59°36’21.9”W, 65 m, 20.x.2019, white plate-trap, TM Almeida coll. One specimen in alcohol (INPA): idem, except trail of “ Neblina ” waterfall, 02°01’47.2”S, 59°35’24.1”W, 169 m, 05.vi.2021, pitfall-trap, NG Cipola & SS Viana coll. Two specimens in alcohol (INPA): Rio Preto da Eva municipality, “Flor do Campo” farm, “AM-010” road margin, km 57, 02°43’33.1”S, 59°51’05.7”W, 117 m, 19–21.vi.2023, pitfall-trap, BM Medeiros & SS Viana coll. One male on slide and 1 specimen in alcohol (INPA): Rondônia state, Porto Velho municipality, Ecological Station “Cuniã”, 08°11’27.3”S, 63°45’59.1”W, 78 m, 19–20.vi.2013, pitfall-trap, MC Ramos coll. One female on slide (INPA): Roraima state, Amajari municipality, “Serra do Tepequém”, 03°46’33”N, 61°43’35”W, 32 m, 15–31.vii.2015, malaise-trap, PCS Barroso & Boldrini coll. One female on slide (INPA): idem, except 15–30.vi.2015. One female on slide and 1 specimen in alcohol (INPA): Caracaraí municipality, National Park of “Viruá”, 01°27’34”N, 61°00’24”W, 65 m, 16.i–6.ii.2013, pitfall-trap, IPS Santos coll. One female and 1 male on slide (INPA): idem, except 01°29’12”N, 61°00’57”W, 66 m, 21–29.v.2015, malaise-trap, SS Gadelha & DRR Fernandes coll. Four females on slides and 24 specimens in alcohol (INPA): idem, except National Park of “Serra da Mocidade”, Ron, 630 m, 15–26.i.2016, yellow tray-trap, FF Xavier, R Boldrini, P Barroso coll.   
 Diagnosis. Head pigmented or not, dorsal trunk usually with an depigmented irregular spot; Th III–Abd II generally with a transverse band (Figs 12–14); Ant IV without the apical bulb; pl1–2 smooth, pl1 bifurcate and pl2 normal or bifurcated (Fig. 15C); head macrochaetotaxy with 6–9 ‘ An ’, 3–4 ‘ A ’ (A3 mac rarely present), 2–4 ‘ M ’, 8–9 ‘ S ’, 1 ‘ Ps ’, 4 ‘ Pa ’, 1–2 ‘ Pi ’, 2 ‘P m ’, 0–1 ‘ Pmp ’, 4 ‘ Pp ’, 1 ‘ Ppe ’ and 3 ‘ Pe ’ mac, respectively (Fig. 15D); labral inner papillae with 2–3 projections, outer with 3 projections (Fig. 16A); labial papilla E l.p. conical and almost reaching the base of a.a. (Fig. 16B); Th II internally with 9 anterior, 5–10(13) median and 12–20(21) posterior mac; Th III–Abd I with 19–23(26) and 6–10 mac, respectively; Abd II–III with 3–5 and 0 inner mac, respectively; Abd IV with 15–23 inner and 15–19 outer mac (Figs 17A–C); unguiculus III ai lamella smooth and pe serrated (Fig. 18E); collophore anteriorly with 3(4) distal mac (Fig. 19A); dens distally with 2 rows of large modified chaetae (Fig. 19D); mucro proximal tooth larger than distal one, basal spine surpassing the apex of the proximal tooth (Fig. 19E).   
 Redescription. Total length (head + trunk) of specimens 1.46–2.78 mm (n=4), neotype 1.46 mm. Specimens pale or dark yellowish with violet to black pigments on distal half of or completely on Ant IV, proximal and distal region of the Ant III–II, Ant I basally pigmented, or absent pigments on Ant I–III; head dorsally with irregular spots strongly or weakly pigmented, or entirely absent; irregular patches over the entire head, dorsal region eventually with a depigmented spot; Th III–Abd II with a transverse band heavily or weakly pigmented, rarely absent; Abd III laterally with a longitudinal and irregular stripe; Abd IV with two irregular transverse bands (median and posterior), rarely absent; Abd V–VI distally with a transversal stripe, eventually depigment centrally; coxa I–III and collophore (distally) irregularly pigmented or not; femur I–III eventually with a longitudinal stripe, but always with 1 distal spot; tibiotarsus I–III depigment, rarely with 1 proximal and 1 distal spot; eyepatches black (Figs 12–14).   
 Head. Antenna variable, subequal, shorter or longer than the trunk length (Figs 12G–L, 13E–H, 14F–J), ratio antennae: trunk = 1.21–0.80: 1 (n=4), neotype 0.80: 1; antennal ratio as I: II: III: IV = 1: 1.4–1.77: 1.05–1.59: 1.45–2.58 (n=4), neotype 1: 1.40: missing: 2.58. Ant IV weakly annulated on its distal 2/3 and devoid of apical bulb, with 4 apical finger-shaped sens and numerous sens of different sizes. Ant III sense organ with 2 club-shaped sens, 3 guard sens, 3 elongated sens and at least 3 finger-shaped sens (Fig. 15A). Ant II dorsally with about 8 elongated sens and 3–5 mac; ventrally with 4 apically acuminate mac (Fig. 15B). Ant I dorsally with about 4 elongated sens, 2–9 mac and 2 smooth mic at the base (Fig. 15B). 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. 15D) with 6–9 ‘ An ’, 3–4 ‘ A ’ (A3 mac rarely present), 2–4 ‘ M ’, 8–9 ‘ S ’, 1 ‘ Ps ’, 4 ‘ Pa ’, 1–2 ‘ Pi ’, 2 ‘ Pm ’, 0–1 ‘ Pmp ’, 4 ‘ Pp ’, 1 ‘ Ppe ’ and 3 ‘ Pe ’ mac, respectively. Clypeal formula with 4 (l1–2), 7–13 (f, 1 unpaired), 3 (pf0–1) ciliate chaetae, l1–2 longer and apically acuminate, 2 f and pf0 larger, 2 f and pf1 slightly larger than the others, others subequal (Fig. 15C). Labral inner papillae with 2–3 projections, outer papillae with 3 projections (one outer projection sometimes secluded) and subequal to the inner papillae (Fig. 16A). Prelabral chaetae smooth, pl1 equally or subequally bifurcated, pl2 normal, equally or subequally bifurcated (Fig. 15C). Labial papilla E l.p. conical and almost reaching the base of a.a. (Fig. 16B). Maxillary palp b.c. 1.22 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 smaller, both present or absent (Fig. 16C). Cephalic groove with 11–13 ciliate chaetae of different lengths; postlabial formula with 3–4 (G1–4), 4 (X2–4), 4 (H1–4) chaetae plus 1 chaeta between the series (Fig. 16D).   
 Thorax chaetotaxy (Fig. 17A). Th II a, m and p series (excluding the anterior collar) with 9, 5–13 (3 mac rarely present) and 12–21 mac (1 mac rarely present), respectively. Th III a, m and p series with 6–7, 5–6 (1 mac rarely present) and 8–13 (2 mac rarely present) mac, respectively. Ratio Th II: III = 1.85–1.51: 1 (n=4), neotype 1.51: 1.   
 Abdomen chaetotaxy (Figs 17B–C). Abd I a, m and p series with 0–2, 5–7 and 1 mac, respectively. Abd II a, m and p series with 0–2, 4–5 and 0–2 mac, respectively. Abd III a, m and p series with 0–1, 3 and 2 mac, respectively. Abd IV with 15–23 inner mac of A–C series and 15–19 outer mac of T–Fe series; about 14 sens (ps type I and others type II) and 19 posterior mes. Abd V a, m and p series with 4, 3, and 4 mac, respectively. Ratio Abd III: IV = 1: 7.31–10.35 (n=4), neotype 1: 10.35.   
 Legs (Figs 18A–E). Subcoxa I with 3 chaetae, 1 posterior chaeta and 2 psp; subcoxa II with an anterior row of 10 chaetae and about 26 anterior chaetae; posterior row of 5 chaetae, 2 anterior chaetae, 1 posterior chaeta and 3 psp; subcoxa III with one row of 10 chaetae, about 32 anterior chaetae and 2 psp (Figs 18A–C). Trochanteral organ with 19–30 spine-like chaetae (Fig. 18D). Tibiotarsus I–III with 9–10 inner finely ciliate mac; 1 outer apically acuminate mac at the base. Unguis b.t. on proximal 2/4, m.t. on distal 1/4 and smaller than b.t., a.t. minute and on distal 1/8. Unguiculus I–III lamellae (ae, ai, pe, pi) smooth and acuminate, except III with pe serrated; ratio unguis: unguiculus = 1: 0.56. Tibiotarsus III smooth chaeta 1.17 longer than the unguiculus; tenent hairs 0.93 shorter than the unguis (Fig. 18E).   
Collophore (Fig. 19A). Anterior side with about 17–22 ciliate chaetae, 3–4 distal mac (1 mac rarely present) and about 13–18 chaetae of different sizes widely distributed on the corpus; posterior side with about 52 ciliate chaetae of different sizes widely distributed on the corpus (10 unpaired) and distally 1 smooth chaeta; lateral flap with 13–17 chaetae, 7 smooth and 6–10 ciliate.  
 Furcula (Figs 19B–E). Manubrium ventrally with 2 subapical and about 26 distal ciliate chaetae of different sizes. Manubrial plate dorsally with 4–11 chaetae of different sizes and 3 psp. Dens dental lobe with 2 (bs1 and bs2) thicker ciliate chaetae, bs1 subequal to bs2. Dens tightly crenulate on its distal 1/7; distally with 2 rows (1 inner and 1 outer) of larger modified chaetae, 1 inner chaeta distally larger than the others. Mucro proximal tooth larger than the distal tooth, mucronal spine surpassing the proximal tooth apex.   
 Variations. Entomobrya egleri specimens from different localities mostly show similar variations, especially on the body color pattern (Figs 12–14) and polymorphisms (mac or mes, mac present or absent) in the dorsal chaetotaxy of the head and Th II – Abd IV (Figs 15D, 17). However, some atypical variations were found in some populations, as head A3 mac present only in a specimen from Belterra and another from Melgaço municipality (Pará state) (Fig. 15D). In four specimens from Roraima state (Amajari and Caracaraí municipality) on one side of Th II there are p4, m4ip, m5 and m5a mac (Fig. 17A), although these last three mac are only present in two specimens. Other atypical variations are in a specimen from Rurópolis and another from Belterra municipality (Pará state), with Th III p1ip and p2e mac present on both sides (absent in specimens from other localities), although this Belterra specimen also has m1 mac present on both sides (Fig. 17A), besides 1 extra mac on one side of the colophore anteriorly (Fig. 19A). These atypical and isolated variations among the populations may be evidence of potential speciation, but a study based on molecular data is necessary to determine if they represent a cryptic species complex.   
 Distribution. In the original description, E. egleri was registered in three states (Pará, Amapá and Tocantins), and later in Amazonas state as well (Arlé & Guimarães 1978; Oliveira & Deharveng 1995). Here, the distribution of the species is expanded to another three states (Acre, Rondônia and Roraima) from the Brazilian Amazon (Fig. 20).   
 Remarks. Entomobrya egleri closely resembles E. uambae Arlé, 1959 from Mato Grosso state, by the presence of a transverse band of dark pigment on Th II–Abd III, Ant IV apical bulb absent, prelabral chaetae pl1–2 smooth, papilla E I.p. conical-shaped, and overall dorsal macrochaetotaxy pattern (Figs 12–14, 15C, 16B). However, E. egleri differs from this species by Ant I with 4 elongated sens (absent in E. uambae), Ant II with 8 elongated dorsal sens and 4 ventral mac (5 dorsal sens and no ventral mac in E. uambae) (Figs 15B, 30C), labral outer papillae with 3 projections (2 in E. uambae) (Figs 16A, 31A), Abd IV with 19 posterior mes (16 in E. uambae) (Figs 17C, 32C), unguiculus III ai lamella acuminate (slightly truncate in E. uambae) (Figs 18E, 33G), collophore with 3 distal mac (6 in E. uambae) (Figs 19A, 34A), and distal dens with two rows (inner and outer) of modified mac (only 1 inner in E. uambae) (Figs 19D, 34D). 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 18-29, DOI: 10.11646/zootaxa.5452.1.1, http://zenodo.org/record/11232742