Seira burgersi

Cipola, Nikolas Gioia, Arbea, Javier, Baquero, Enrique, Jordana, Rafael, Morais, José Wellington De & Bellini, Bruno Cavalcante, 2018, The survey of Seira Lubbock, 1870 (Collembola, Entomobryidae, Seirinae) from Iberian Peninsula and Canary Islands, including three new species, Zootaxa 4458 (1), pp. 1-66: 51-59

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Seira burgersi

sp. nov.

Seira burgersi  sp. nov. Cipola & Arbea

Figs 3B, D View Figure , 35‒41View FIGURE 35View FIGURE 36View FIGURE 37, Tables 1‒2

Diagnosis. Body black with legs yellowish ( Figs 3B, D View Figure ); AntAbout Ant I‒II enlarged and with scales spiral-shaped ( Figs 35 A ‒D View Figure ); head macAbout mac M 4i, S4 and Pa4 present, Pp6 absent, eyepatches with 3‒4 interocular chaetae (q absent, r eventually absent) ( Fig. 36E View Figure ); prelabral inner chaetae smooth ( Fig. 36C View Figure ); labral papillae large and rounded ( Fig. 36D View Figure ); Th II with 7‒11 medio-central macAbout mac (m1‒2 complex) and PmA‒PmC groups with 9‒12, 3, 7‒8 macAbout mac, respectively ( Fig. 37 A View Figure ); Th III ‒ AbdAbout Abd III with 13‒17, 8‒9, 5 and 1 central macAbout mac, respectively, plus several pspAbout psp laterally on these segments ( Figs 37B‒E View Figure ); AbdAbout Abd IV with 17‒18 central and 22 lateral macAbout mac ( Fig. 38 A); tibiotarsi with about 18 robust inner macAbout mac finely ciliate and apically acuminate ( Figs 39C‒E View Figure , 40G View Figure ); unguis apical tooth present ( Fig. 40H View Figure ); unguiculus outer edge discretely serrated distally and with one small proximal tooth ( Fig. 40H View Figure ); manubrium ventrally with 0/4 subapical and 20 apical chaetae ( Fig. 41B View Figure ).

Type material. Holotype female on slide (EHL0004/MNCN): Spain, Huelva province, Minas de Riotinto municipality (37°39'11''N, 06°37'10''W)GoogleMaps  , under stones, 445m, 18. iii.2014, A  . Burgers coll. Paratypes on slides ( MNCNAbout MNCN), 2 females, same data as holotype  . Paratypes on slides (INPA): 3 females and 3 specimens in alcohol: El Campillo (37°40'57.08''N, 6°36'25.99''W), under stones, 358 m, 19.04.2017, A  . Burgers leg.

Description. Total length ( head + trunk) of adult specimens 3.83‒5.56 mm (n=4), holotype 5.56 mm. Alive specimens completely black, except AntAbout Ant II-IV base depigmented, and trochanters to unguis lightly yellow ( Fig. 3B View Figure ). Specimens in alcohol with similar color pattern, butAbout but dark purple pigments on body; eyepatches black ( Fig. 3D View Figure ). Scales present on AntAbout Ant I to two basal third of AntAbout Ant III, ventral and dorsal head, thorax and abdomen dorsally, legs (except empodia), anterior collophore, dorsal and ventral manubrium and dentes ventrally ( Figs 39C‒E View Figure , 41 A View Figure ). AntAbout Ant I‒II densely covered by scales heavily ciliated, elongated in spiral-shape with rounded or truncate apex ( Fig. 35 A, C‒D View Figure ).

Head. Antennae shorter than body length, antennal ratio as I: II  : III: IV = 1: 1.6 0‒1.76: 1.20‒1.25: 1.81‒2.16 (n=3), holotype 1: 1.76: 1.25: 2.16 ( Figs 3B, D View Figure , 35B View Figure ). AntAbout Ant IV annulated, with apically bilobed apical bulb retractile and blunt sens ( Fig. 36 A View Figure )  . Ant III apical organ with two rod-like sens, 3 guard sens, and several blunt sens of different sizes ( Fig. 36B View Figure ). AntAbout Ant I‒II enlarged ( Figs 35 A ‒B View Figure )  . Clypeal formula with 4 (l1‒2), 3 (f), 9 (pf0‒2) ciliate chaetae, l1 acuminate, l2 largest, and 2 prefrontal smaller ( Fig. 36C View Figure ). Four labral papillae large and rounded ( Fig. 36D View Figure ). Maxillary palp with smooth apical appendage (a.a.) and basal chaeta (b.c.) weakly ciliated, thicker and 0.88 smaller than apical. Eyes A and B larger, G and H smaller, with 3‒4 interocular chaetae (v, p, r, t), r eventually absent; head dorsal chaetotaxy ( Fig. 36E View Figure ) with 10‒12 ‘An’ macAbout mac (An 1, An 2‒3), 4 ‘A’ macAbout mac (A 0, A 2‒3, A 5), 4 ‘M’ macAbout mac (M1‒2, M 4i ‒4), 8 ‘S’ macAbout mac (S0‒6), 1 ‘Ps’ macAbout mac ( Ps 2), 5 ‘Pa’ macAbout mac ( Pa 1‒5), 2 ‘Pm’ macAbout mac ( Pm 1, Pm 3), 4 ‘Pp’ macAbout mac ( Pp 1‒3, Pp 5)  , and 4 ‘Pe’ macAbout mac (Pe 2‒4 plus Pe 3p)  . Basomedian and basolateral labial fields with M1‒2, R (smaller), E, L1‒2. Postlabial ventral chaetotaxy with about 18 ciliate chaetae, postlabial formula 4 (G1‒4), 3 (H2‒4), 4 (J1‒4), basal chaeta (b.c.) largest ( Fig. 36F View Figure ).

Thorax chaetotaxy ( Figs 37 A ‒B View Figure ). Th II, series ‘a’ with 4  ‒5 mac (a5ip‒5p and one unnamed rarely present); series ‘m’ with 11‒14 mac (m1‒2 complex, m 4i ‒4p), 4 mac present or absent; series ‘p’ with 20‒ 24 macAbout mac (p1ip4‒1p4p, p2a‒2ep2, p 3i 2‒3p, p5), p1ip4 and p 3i as macAbout mac or micAbout mic, p1p5 and p1p4p eventually absent  . Th III, series ‘a’ with 6‒7 mac (a 1i ‒6), a2 rarely absent; series ‘m’ with 1‒ 2 macAbout mac (m1, m6), m1 generally as micAbout mic; series ‘p’ with 10  ‒12 mac (p1ip‒1p, p2a2‒2ea, p3, p5‒6), p1ip and p2ea mac rarely absent; 2 extra central and 10 lateral pspAbout psp present  . Th ratio as II: III = 1: 0.53‒0.59 (n=4), holotype 1: 0.59. 

Abdomen chaetotaxy ( Figs 35 E View Figure , 37C‒E View Figure , 38 A ‒B)  . Abd I, series ‘a’ with 4 mac (a 1i ‒3); series ‘m’ with 4‒5 mac (m 2i ‒4), m 4i rarely absent, and 11 lateral psp present. Abd II, series ‘a’ with 2 mac (a2–3); series ‘m’ with 4 mac (m3‒3e, m5), and 3 lateral psp present. Abd III, series ‘m’ with 3 mac (m3, am6, pm6); series ‘p’ with 1 mac (p6), and 12 lateral psp. AbdAbout Abd IV with 17‒18 central macAbout mac of series ‘A’ to ‘T’ (A 3a‒6, Ae 7, B1‒6, C1, C4, T1 and one unnamed present or absent)  , and 22 lateral macAbout mac of series ‘E’ to ‘Fe’ (E2‒4p, Ee 7, Ee 10, F1‒3, Fe 2‒5 and five of uncertain homology); at least 4 sens (as? and ps type I and 2 type II)  , and posteriorly with 7 mes present. Abd V, series ‘a’ with 1 mac (a5); series ‘m’ with 4 mac (m2‒3, m5‒5e); series ‘p’ with 5 mac (p1, p3‒5, ap6); one extra sens next to acc.p4 sens rarely present. AbdAbout Abd ratio as III: IV = 1: 3.9 7‒5.33 (n=4)  , holotype 1: 4.88.

Legs. Subcoxa I with 6 chaetae and 2 psp; subcoxa II with an anterior row of 9 chaetae, posterior row with 7 chaetae, 2 posterior chaetae and 8 psp; subcoxa III with one row of 12 chaetae, 5 anterior chaetae in a row and 2 posterior pspAbout psp ( Figs 40 A ‒C View Figure ). Trochanter I‒II inner side with 9 and 11 spine-like chaetae, respectively, surrounded by ciliate chaetae ( Figs 39 A ‒B View Figure ; 40D‒E View Figure )  . Trochanteral organ with about 64 spine-like chaetae ( Fig. 40F View Figure ). Tibiotarsi inner side armed by 18 robust mac finely ciliate and apically acuminate, outer side with one basal largest and one acuminate and elongated chaeta ( Figs 39C‒E View Figure , 40G View Figure ). Unguis with basal and median teeth with the same length, apical tooth smaller. Unguiculus with all lamellae acuminate, pe lamella serrated distally and with small proximal tooth, other lamellae (ai, ae, pi) smooth; ratio unguis: unguiculus = 1: 0.52 ( Fig. 40H View Figure )  . Tibiotarsus III distally with inner smooth chaeta 1.11 larger than unguiculus; and outer tenent hair capitate, discretely ciliate, and 0.78 smaller than unguis.

Collophore ( Fig. 41 A View Figure )  . Anterior side with 14 ciliate chaetae, including 2 distal mac and 3 proximal long acuminate chaetae; posterior side with 20 ciliate chaetae, of which 2 distal thickest; lateral flap with 3 smooth chaetae (one small posteriorly) and about 29 ciliate chaetae.

Furcula ( Figs 41B‒C View Figure ). Manubrium ventrally with formula 1, 0, 0, 0/ 4 (subapical), 20 (apical) ciliate chaetae and approximately 23 elongated apical scales per side; manubrium dorsally with 6 subapical ciliate chaetae; manubrial plate with 8‒9 ciliate chaetae and 3 psp.

Etymology. The species was named after André Burgers, who collected the specimens.

Remarks. In general, S. burgersi  sp. nov. is similar to S. pallidipes  by body black with legs yellowish and overall dorsal macrochaetotaxy, head with macAbout mac M 4i, S4 and Pa4, and AbdAbout Abd I‒ III with 9, 5 and 1 central macAbout mac respectively. However, S. burgersi  sp. nov. differs from this species by Th II with up to 11 medio-central macAbout mac (up to 10 in S. pallidipes  ) and 7‒8 macAbout mac in PmC group (9 in S. pallidipes  ); Th III with up to 17 central macAbout mac (15 in S. pallidipes  ), and AbdAbout Abd IV with 22 lateral macAbout mac (19 in S. pallidipes  ). Other features that differ S. burgersi  sp. nov. from S. pallidipes  are prelabral inner chaetae smooth ( ciliate in S. pallidipes  ), collophore with 14 anterior and 20 posterior chaetae (9 and 12 in S. pallidipes  ), and manubrium with formula 1, 0, 0, 0/ 4 ( subapical), 20 ( apical) ciliate chaetae (0, 0, 2, 2/4, 18 in S. pallidipes  ).

The Ant I‒II enlarged with elongated spiral-shaped scales present in S. burgersi  sp. nov. ( Figs 3B, D View Figure , 35A‒D View Figure ) is an unprecedented characteristic recorded in the genus (probably autapomorphic), as well as in Entomobryoidea, since somehow similar characteristics were observed only in some species of Dicranocentroides  Imms (1912) ( Paronellidae  ) ( Kim et al. 1999; Hazra & Mandal 2015). Species like S. meyerae  (Coates, 1969) comb. nov., S. pectinifera  Jacquemart, 1980 (in 1980b) and S. timiae  Jacquemart, 1980 (in 1980c) also have modified scales in antennae and dorsal macrochaetotaxy smilar to S. burgersi  sp. nov., and for that reason these species are closely related. However, in these species (except S. burgersi  sp. nov.) the antennal scales have different morphologies (non-spiral) and are associated with modified chaetae (branched in S. pectinifera  and spine-like in S. meyerae  comb. nov. and S. timiae  ), plus the dorsal macrochaetotaxy is clearly less dense when compared to the new species. Seira burgersi  sp. nov. also differs from these species by another exclusive characteristic, the presence of numerous lateral psp on Th II‒Abd III ( Figs 37B‒E View Figure ). Other comparisons among species are presented in Tables 1 and 2.


Anguilla National Trust


Instituto do Meio Ambiente


University of Aberdeen


Parasitic Seed Plants


Museo Nacional de Ciencias Naturales


Butler University


Mar Ivanios College (Zoology museum)