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

Seira dinizi Gama, 1988

Figs 2B , 10‒13 , 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. 2B ) ; head mac M 4i, S4, Pa 4 and Pp 6 absent, eyepatches with 3 interocular chaetae (q and r absent) ( Fig. 10E ) ; labral papillae conical, outer papillae reduced to square projection ( Fig. 10C ); 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. 11A ); Th III‒ Abd III with 1 1‒14, 5, 3 and 1 central mac respectively ( Figs 11 B‒E ) ; 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. 13F ).

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) , Veril, near and away from the sea to island southeast, 16 m, 17.vi.2001, 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) , 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. 2B ). 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. 13E ).

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. 10A ). Clypeal formula with 4 (l1‒2), 3 (f), 3 (pf0‒1) ciliate chaetae, l1 acuminate, l2 largest, and 2 frontal smaller ( Fig. 10B ). Two inner labral papillae conical, outer papillae reduced to square projections ( Fig. 10C ). Maxillary palp with smooth apical appendage (a.a.) and basal chaeta (b.c.) weakly ciliated, thicker and 1.44 longer than apical ( Fig. 10D ). Eye A larger, H smaller, with 3 interocular chaetae (v, p, t); head dorsal chaetotaxy ( Fig. 10E ) 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. 10F ).

Thorax chaetotaxy ( Figs 11A‒B ). 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‒E , 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. 13H ).

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‒C ). Trochanteral organ with about 15 spine-like chaetae ( Fig. 13D ). 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. 13E ). 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‒G ). 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.

Figures

FIGURE 2A–G. Seira spp., habitus: A, S. domestica; B, S. dinizi; C‒D, S. ferrarii: C, in natural habitat, courtesy of Francisco Rodríguez (http://www.biodiversidadvirtual.org/insecta rium/Seira-ferrarii-img750580.html), D, in alcohol; E‒G, S. pini: E, paratype, F, specimen with pigmentation in legs from Monegros (Spain), G, specimen depigmented on Th II to Abd III and with one median spot on Abd IV from Monegros (Spain). Scale bars: 0.5mm.

FIGURE 10A–F. Seira dinizi: head; A, Ant III apical organ; B, clypeal chaetotaxy; C, labral papillae; D, maxillary outer lobe; E, dorsal cephalic chaetotaxy; F, postlabial ventral head, arrow indicates normal ciliated chaetae.

FIGURE 11A–E. Seira dinizi: dorsal chaetotaxy; A, Th II; B, Th III; C, Abd I; D, Abd II; E, Abd III.

FIGURE 13A–H. Seira dinizi: A, subcoxa I; B, subcoxa II; C, subcoxa III; D, trochanteral organ; E, collophore chaetotaxy (lateral view); F, manubrium ventral chaetotaxy; G, manubrial plate and subapical chaetae (dorsal view); H, female genital plate.