Seira dinizi Gama, 1988,

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: 18-23

publication ID

publication LSID

persistent identifier

treatment provided by


scientific name

Seira dinizi Gama, 1988


Seira dinizi Gama, 1988 

Figs 2BView FIGURE 2, 10‒13View FIGURE 10View FIGURE 11, Tables 1‒2

Seira dinizi Gama, 1988  (in Gama 1988a): 77, fig. 1, Canary Islands, Spain (orig. descr.), not examined. Yoshii, 1990: 535, figs 1A ‒F, Ilha de São Miguel Island, Azores Macaronesia, Portugal (descr.). Baquero et al., 2014: 1577 (compared). Cipola et al., 2014a: 494 (cit.)

Diagnosis. Body bluish ( Fig. 2BView FIGURE 2)  ; head mac M 4i, S4, Pa 4 and Pp 6 absent, eyepatches with 3 interocular chaetae (q and r absent) ( Fig. 10EView FIGURE 10)  ; labral papillae conical, outer papillae reduced to square projection ( Fig. 10CView FIGURE 10); Th II with 4 medio-central mac (m1‒ 1i, m2‒ 2i) and PmA ‒PmC groups with 6‒7, 3 and 3‒5 mac respectively ( Fig. 11AView FIGURE 11); Th III ‒ Abd III with 1 1‒14, 5, 3 and 1 central mac respectively ( Figs 11 B ‒EView FIGURE 11)  ; Abd IV with 12‒13 central and 17‒19 lateral mac ( Fig. 12A)  ; unguis apical tooth present; unguiculus outer edge serrated and without proximal tooth; manubrium ventrally with 2/4 subapical and 16 apical chaetae ( Fig. 13FView FIGURE 13).

Examined material. 3 males, 8 females and 18 juveniles on slides and 119 specimens in alcohol ( EIC6001-2 / INPA and JIAP)  : Canary Islands, Province of Las Palmas, Isla of Montaña Clara (29°17'35''N; 13°31'59''W)GoogleMaps  , Veril, near and away from the sea to island southeast, 16 m,, pitfall-traps, B. Rodríguez coll  . 1 male, 4 females and 1 juvenile on slides (EIC6005-6/JIAP): idem, except volcanic pit (29°17'35''N; 13°32'05''W), 256 m, x.2001. 1 juvenile on slide (EIC4376/JIAP): El Hierro Island, Frontera municipality (27°45'14''N; 18°00'34''W)GoogleMaps  , near Cave, 141 m, 06.x.2000, P. Oromí coll.

Description based on the listed specimens. Total length ( head + trunk) of specimens 1.88‒2.00 mm (n=3). Specimens pale white with blue pigment heavily on Ant I ‒IV and diffuse on head, trunk and legs; eyepatches black ( Fig. 2BView FIGURE 2). Scales present on Ant I to basal half of Ant III, ventral and dorsal head, thorax and abdomen dorsally, legs (except empodia), and manubrium and dentes ventrally. Collophore without scales ( Fig. 13EView FIGURE 13).

Head. Antennae shorter than body length, antennal ratio as I: II  : III: IV = 1: 1.84‒1.9: 1.96‒2.01: 2.16‒2.71 (n=2). Ant IV not annulated, with simple apical bulb and blunt sens. Ant III apical organ with two rod-like sens, 3 guard sens and several blunt sens of different sizes ( Fig. 10AView FIGURE 10). Clypeal formula with 4 (l1‒2), 3 (f), 3 (pf0‒1) ciliate chaetae, l1 acuminate, l2 largest, and 2 frontal smaller ( Fig. 10BView FIGURE 10). Two inner labral papillae conical, outer papillae reduced to square projections ( Fig. 10CView FIGURE 10). Maxillary palp with smooth apical appendage (a.a.) and basal chaeta (b.c.) weakly ciliated, thicker and 1.44 longer than apical ( Fig. 10DView FIGURE 10). Eye A larger, H smaller, with 3 interocular chaetae (v, p, t); head dorsal chaetotaxy ( Fig. 10EView FIGURE 10) with 6 ‘An’ mac ( An 1, An 2‒3), 3‒4 ‘A’ mac (A0, A2‒3, and A5, rarely as mic), 3 ‘M’ mac (M1‒2, M4), 7 ‘S’ mac (S0‒3, S5–6), 1 ‘Ps’ mac ( Ps 2), 4 ‘Pa’ mac ( Pa 1‒3, Pa 5), 2 ‘Pm’ mac ( Pm 1, Pm 3), 4 ‘Pp’ mac (Pp 1‒3, Pp 5)  , and 2 ‘Pe’ mac (Pe2‒3). Basomedian and basolateral labial fields with M1‒2, R, E, L1‒2, M1 and R smaller. Postlabial ventral chaetotaxy with about 17 ciliate chaetae, postlabial formula 4 (G1‒4), 3 (H2‒4), 4 (J1‒4), J2 and one proximal smaller; basal chaeta absent ( Fig. 10FView FIGURE 10).

Thorax chaetotaxy ( Figs 11A ‒BView FIGURE 11). Th II, series ‘a’ with 4 mac (a 5i ‒5p and one unnamed anteriorly); series ‘m’ with 7 mac (m 1i ‒1, m 2i ‒2, m 4i ‒4p); series ‘p’ with 13‒16 mac (p 1i 2p ‒1p, p2a ‒2ep2, p3, p5), p 1i 2p and p2e rarely absent, p2ep2 generally as mac. Th III, series ‘a’ with 4‒6 mac (a 1i ‒5), a1 generally as mac and a5 present or absent; series ‘m’ without mac; series ‘p’ with 9‒10 mac (p 1i ‒1p, p2a ‒2ea, p3, p5‒6), p2e generally as mac. Th ratio as II: III = 1: 0.6 1‒0.77 (n= 3). 

Abdomen chaetotaxy ( Figs 11C ‒EView FIGURE 11, 12A ‒B). Abd I, series ‘a’ without mac; series ‘m’ with 5 mac (m 2i ‒4). Abd II, series ‘a’ with 1 mac (a2); series ‘m’ with 3 mac (m3‒3e, m5). Abd III, series ‘m’ with 2 mac (m3, pm6); series ‘p’ with 2 mac (p6, p 7i). Abd IV with 12‒13 central mac of series ‘A’ to ‘T’ (A3‒6, Ae 7, B3‒6, C1, C4, T1, T7), T7 as mac or mes, and 17‒19 lateral mac of series ‘D’ to ‘Fe’ (D3p, E2‒4p, F1‒3p, Fe 2‒6), F3p and Fe 6 as mac or mes; at least 3 sens (as? and ps type I and one type II)  , and posteriorly with 6 mes present. Abd V, series ‘a’ with 1 mac (a5); series ‘m’ with 4 mac (m2‒3, m5‒5e); series ‘pa’ with 2 mac (p3a, p6ai); series ‘p’ with 6 mac (p0‒1, p3‒5, ap6). Abd ratio as III: IV = 1: 2.55‒3.57 (n= 3)  . Female genital plate with two pairs (superior and inferior) of small smooth chaetae ( Fig. 13HView FIGURE 13).

Legs. Subcoxa I with 3 chaetae and 2 psp; subcoxa II with an anterior row of 10 chaetae, posterior row of 3 chaetae and 3 psp; subcoxa III with one row of 9 chaetae, 1 anterior chaeta and 2 posterior psp ( Figs 13A ‒CView FIGURE 13). Trochanteral organ with about 15 spine-like chaetae ( Fig. 13DView FIGURE 13). Unguis with median and apical teeth with the same length, basal teeth smaller. Unguiculus with all lamellae acuminate, pe lamella serrated and without proximal tooth, other lamellae (ai, ae, pi) smooth; ratio unguis: unguiculus = 1: 0.59. Tibiotarsus III distally with inner smooth chaeta 1.08 larger than unguiculus; and outer tenent hair capitate, discretely ciliate, same length as unguis  .

Collophore ( Fig. 13EView FIGURE 13). Anterior side with 12 ciliate chaetae, including 2 distal mac, 1 apically acuminate chaeta; posterior side with 1 thicker ciliate chaeta; lateral flap with 1 smooth chaeta and 12 ciliate chaetae.

Furcula ( Figs 13F ‒GView FIGURE 13). Manubrium ventrally with formula 1, 2, 2, 2/4 (subapical), 16 (apical) ciliate chaetae and approximately 4 elongated apical scales per side; manubrium dorsally with 5 subapical ciliate chaetae; manubrial plate with 4 ciliate chaetae and 3 psp.

Remarks. In the original description of Seira dinizi  the species was found in most of the Canary Islands and the characteristics reported were only the dorsal coloration and macrochaetotaxy pattern ( Gama 1988a). The specimens analyzed here from Isla de Montaña Clara and El Hierro corroborate with the characteristics of the original description and for this reason justify the redescription.

Gama (1988a) compared S. dinizi  with S. ferrarii  because of shared apparent reduction in dorsal macrochaetotaxy, but S. dinizi  differs more clearly from this species by body color with diffuse bluish pigment (with stripes on trunk of S. ferrarii  ), Th II without mac a5ip (present in S. ferrarii  ), Th II with 2 lateral mac (4 in S. ferrarii  ) and Abd I ‒II without mac a3 and m3ep (present in S. ferrarii  ). Particularly, S. dinizi  is more similar to Seira dori  Gruia, Poliakov & Broza, 2000 from Israel and S. taeniata  (sensu Yoshii, 1990) from Cape Verde, Macaronesia, by head macrochaetotaxy reduced, Th II with 4 medio-central mac, Abd II ‒III with 3 and 1 central mac, respectively; and Abd IV with 12 central mac (at least in S. dori  ). However, S. dinizi  differs from these species by Th II PmA and PmC groups with 6‒7 and 3‒5 mac, respectively (5 and 6 in S. dori  , 5 and 5 in S. taeniata  ); by the number of Th III with up to 14 central mac in S. dinizi  (p 1i and p1p present), while there are 12 central mac in S. dori  (p 1i and p1p absent) and only 8 in S. taeniata  , respectively; and by the number of Abd I with 5 central mac in S. dinizi  and 4 in S. taeniata  . Other characteristics that differentiate S. dinizi  from the mentioned species include the bluish body colour pattern (restricted to Abd III in S. dori  ); unguiculus with outer lamella serrated and without basal tooth, while this lamella is smooth in S. dori  and S. taeniata  and the basal tooth is present in S. dori  . Other comparisons among species are presented in Tables 1 and 2.


Nottingham City Natural History Museum


Instituto do Meio Ambiente


University of Aberdeen


Instituto Nacional de Pesquisas da Amazonia


Anguilla National Trust


Mar Ivanios College (Zoology museum)


Forssa Museum of Natural History