Seira glabra Godeiro & Bellini, 2013

Godeiro, Nerivânia N. & Bellini, Bruno C., 2015, Two new species and two detailed chaetotaxy descriptions of Seira (Collembola: Entomobryidae) from Brazil, Zootaxa 3972 (2), pp. 208-230 : 225-229

Seira glabra Godeiro & Bellini, 2013 detailed dorsal chaetotaxy

Figs 14–16

Analyzed material. Holotype male, Brazil, Paraíba, Areia 24–27.xi.2011. Bellini, B.C. col. Paratypes: one male and one female, same data as holotype. Type material deposited at Collembola Collection of Museu Nacional/ UFRJ, Rio de Janeiro, number 2416 CM/ MNRJ.

Dorsal head chaetotaxy. ‘An’ series with 9+9 setae; one microseta between An1 and An2 (atypical); one super-numerary macroseta next to An3a2; three super-numerary microsetae next to An3; ‘A’ series with A4 present; A0, A2, A3 and A5 as macrosetae; A1 and A4 as microsetae; three super-numerary microsetae above A0; ‘M’ series with 5+5 setae; M1 and M4 as macrosetae; M2, M3 and M 4i as microsetae; one super-numerary microseta above M3; ‘S’ series with 5+5 setae; S0 and S4 absent (atypical); S1 and S6 as macrosetae; S2 as macroseta or microseta; S3 and S5 as microsetae; Interocular series with 5+5 microsetae: r, s and t as mesosetae; p and q as microsetae; ‘Ps’ series with 3+3 microsetae (Ps2, Ps3 and Ps5); Ps4 absent (typical of Seira , see Soto- Adames 2008); One supernumerary macroseta above Ps5; ‘Pa’ series with 6+6 setae; Pa1, Pa3 and Pa5 as macrosetae; Pa4 as macroseta or microseta; Pa2 as microseta; Pa6 as post ocular trichobothrium; ‘Pm’ series with 2+2 microseta; Pm1 as macroseta or microseta and Pm3 as microseta; Pm2 absent (typical of Seira , see Soto- Adames 2008); ‘Pp’ series with 5+5 setae; Pp1 and Pp2 as macrosetae; Pp3, Pp4 and Pp5 as microsetae ( Fig. 14 ).

Dorsal Th. II chaetotaxy. ‘a’ series (without anterior setal collar) with 6+6 setae; a5ip absent; a2p and a 5i 2p as microsetae; a 5i 2, a 5i, a5, a5p as macrosetae; ‘m’ series with 10+10 or 11+11 setae; m 1i, m 2i, m 4i absent; m 1i 3, m 1i 2, m4ip, m5a, m5 and m5p as microsetae; m1, m2, m 4i and m4p as macrosetae; m4 can be present or absent; ‘p’ series with 15+15 setae; p1ip, p2p and p6e absent; p1, p2, p2ep, p2e and p5 as macrosetae; p 1i 2, p 1i 2p, p1p, p 1i, p2a, p2ea, p3, p3p and p6 as microsetae; p4 as macroseta or microseta ( Fig. 15 A).

Dorsal Th. III chaetotaxy. ‘a’ series with 7+7 microsetae (a1, a2, a3, a4, a5, a6 and a7); a1a absent; ‘m’ series with 5+5 microsetae (m4, m5, m6, m6p and m7); m 1i and m1 absent; ‘p’ series with 9+9 setae; p 1i absent; p1, p2ea, p2a, p2e, p4, p5 and p6 as microsetae; p2 and p3 as macrosetae; setula present near m7 ( Fig. 15 B).

Dorsal Abd. I chaetotaxy. ‘a’ series with 6+6 microsetae (a1a, a1, a1e, a3, a5 and a6); a2 and a5 absent; setula present near a6; ‘m’ series with 5+5 microsetae (m2, m3, m 4i, m4 and m5); m6 absent; ‘p’ series with 1+1 microsetae (p6); p5 absent (atypical) ( Fig. 15 C).

Dorsal Abd. II chaetotaxy. ‘a’ series with 7+7 setae; a2p, a3, as, a6 and a7 as microsetae; a2 as macroseta; a5 as trichobothrium with 6 surrounding fan shaped scales; ‘m’ series with 8+8 setae; m3ep absent; m 3ei, m3ea, m6 and m7 as microsetae; m3, m3e and m5 as macrosetae; m2 as trichobothrium with 3 surrounding fan shaped scales; ‘p’ series with 3+3 microsetae (p5, p6 and p7); se present as setula; el absent ( Fig. 15 D).

Dorsal Abd. III chaetotaxy. ‘a’ series with 8+8 setae; as and a3 as microsetae; am6 and a7 as macrosetae; a1, a2 and a6 as fan shaped scales; a5 as trichobothrium with 8 surrounding fan shaped scales; ‘m’ series with 6+6 setae; m2 as trichobothrium with 4 surrounding fan shaped scales; m5 as trichobothrium with 3 surrounding fan shaped scales; m4 and m3ea as fan shaped scales; m7 as microseta; m3 as macroseta; ‘p’ series with 6+6 setae; p3 and p5 as microsetae; pm6, p6, p 7i and p7 as macrosetae; em, emp and c3 as fan shaped scales; se and el? as setulae; d2 setula present, near p5 ( Fig. 16 A).

Dorsal Abd. IV chaetotaxy. ‘A’ series with 7+7 setae; A2a and A3a absent; A3 and A6 as macrosetae; A1, A2, A4, A5 and Ae7 as microsetae; ‘B’ series with 5+5 setae; B1 absent; B2 as microseta; B3, B4, B5 and B6 as macrosetae; Be2 and Be3 absent; ‘C’ series with 5+5 setae; C4 absent; C1 as macroseta; C1p, C2, C3 and C4a as microsetae; ‘T’ series with 7+7 setae; T7 as macroseta; T1, T3, T5 and T6 as microsetae; T2 and T4 as trichobothria with 4 and 3 (respectively) fan shaped scales above each of them; ps present as setula next to T7; ‘D’ series with 5+5 setae; D2a absent; D1 as fan shaped scale; D1p, D2, D3 and D3p as microsetae; D3 as trichobothria without fan shaped scales associated; ‘E’ series with 8+8 setae; E2a, E2, E3 and E4p as macrosetae; E1, E2p, E4 and E4p2 as microsetae; Ee7 and Ee10 absent; ‘F’ series with 6+6 macrosetae (F1, F1p, F2, F2p, F3, F3p); ‘Fe’ series with 5+5 macrosetae (Fe2, Fe3, Fe4, Fe5, Fe6); Fe2p absent; three super-numerary microsetae below F3p ( Fig. 16 B).

Distribution of dorsal macrosetae of whole body as in Figure 16 C.

Remarks. S. glabra presents some polymorphic setae on head (S2, Pa4 and an extra macroseta above the ocular trichobothria) not represented in the original description. All these setae can be macro or microsetae in different specimens. The cephalic seta Pm1 and the mesothoracic seta p4 originally described as macroseta, were observed as microsetae in part of the specimens. The representation of Fig. 16 C corrects Pp3 and Pp4 on dorsal head, presented originally as macrosetae but only observed as microsetae among different analyzed specimens.

Seira glabra is similar in its dorsal chaetotaxy to other neotropical species of Seira with 0+0 and 1+1 macrosetae in Abd. I. Within these taxa, the most related neotropical species to S. glabra is possibly S. praiana Bellini, Fernandes & Zeppelini, 2010 and they both share a very similar macrochaetotaxy in: dorsal head (with exception of Pa2 which is a macroseta in S. praiana and a microseta in S. glabra ); reduction of macrosetae in Th III (3+ 3 in S. praiana and 2+ 2 in S. glabra , while most species presents at least 7+7); absence of macrosetae in Abd. I; and proximal regions of Abd. II, III and IV, which present a very similar distribution and number of dorsal macrosetae. At the same time, the compared species are different in: Th III, where p2e is a macroseta only in S. praiana ; external region of Abd. III, where a7, p7 and p 7i are developed into macrosetae only in S. glabra ; and external region of Abd. IV, where E1 and E2p are macrosetae only in S. praiana .

Figures

FIGURE 14. Detailed dorsal head chaetotaxy of Seira glabra.

FIGURE 15. Detailed dorsal chaetotaxy of Seira glabra (left side): A, Th. II; B, Th. III; C, Abd. I; D, Abd. II.

FIGURE 16. Detailed dorsal chaetotaxy of Seira glabra: A, Abd. III (left side); B, Abd. IV (left side); C. Distribution of dorsal macrosetae (right side).