Seira primaria, Godeiro, Nerivania N. & Bellini, Bruno C., 2014

Godeiro, Nerivania N. & Bellini, Bruno C., 2014, Three new species of Seira Lubbock (Collembola, Entomobryidae) from Caatinga Domain, northeastern Brazil, Zootaxa 3764 (2), pp. 131-151 : 139-144

Seira primaria sp. nov.

Figs. 6 , 7 , 8 and 9

Type material. Holotype female, Brazil, Ceará, Crato, Trilha do Picoto, 06.ii.2011. Bellini, B.C. col. Paratypes 1 male, same data as holotype. Type material deposited at Collembola Collection of DBEZ / UFRN.

Description. Total body length of holotype 1.35 mm. Habitus entomobryid ( Fig. 6 A). Colour of mounted specimens pale yellow with dark blue pigment covering eye patches ( Fig. 6 A). Well-developed mesothorax, projecting the head ventrally ( Fig. 6 A). Rounded brownish scales covering all Ant. I and II, basal halves of Ant. III and IV, head, thorax, abdomen, legs, manubrium (dorsally) and dentes (ventrally). Ventral tube without scales. Ant. IV weakly annulated, with a bilobed apical bulb, several multiciliated setae, some small smooth setae and some blunt s-setae ( Fig. 6 B). Eye patches oval with 8+8 lenses, B biggest and H smallest ( Fig. 6 C). Five interocular multiciliated setae, ‘p’ as macrochaeta, ‘q’, ‘r’, ‘s’ and ‘t’ as mesochaetae ( Fig. 6 C). Prelabral and labral setae smooth. Labial triangle ‘M1’, ‘M2’ and ‘E’ ciliate, ‘r’ apparently smooth and reduced ( Fig. 6 D), ‘L1’, ‘L2’ multicilated (not drawn). Trochanteral organ with approximately 20 short spines ( Fig. 6 E). All ungues with four teeth, basally two paired and apically two unpaired ( Figs. 6 F–H). Unguiculi lanceolate, with slightly serrated edges ( Figs. 6 F–H). Tenent hair capitate with slightly serrated posterior edges. Ventral face of manubrium with 4+4 subapical setae. No spine-like setae present on the manubrium. Mucro typically falcate ( Fig. 6 I).

Dorsal head chaetotaxy. ‘An’ series with 7+7 macrochaetae; one super-numerary microseta between An3a and An3; ‘A’ series lacking A4; A0, A2, A3 and A5 as macrochaetae; A1 and two super-numerary setae near A2 and A5 as microsetae; ‘M’ series with 5+5 setae; M1, M2 and M4 as macrochaetae; M3 and M 4i as microsetae; ’S’ series with S0 and 6+6 setae as macrochaetae; Interocular series with 5+5 setae; p as macrochaeta; q, r, s t as mesochaetae; ‘Ps’ series with 3+3 microsetae; Ps4 absent; ‘Pa’ series with 5+5 setae, Pa4 absent; Pa1 as microseta; Pa2, Pa3 and Pa5 as macrochaetae; Pa6 as post ocular trichobothrium; ‘Pm’ series with 2+2 setae, Pm2 absent; Pm1 as microseta, Pm3 as macrochaeta; ‘Pp’ series with 4+4 microsetae, Pp4 absent ( Fig. 7 ).

Dorsal mesothorax chaetotaxy. ‘a’ series (without anterior setal collar) with 6+6 setae, a 5i 2p absent; a2p as microseta; a 5i 2, a5ip, a 5i, a5, a5p as macrochaetae; ‘m’ series with 13+13 setae, m 2i 2 absent; m 1i 3, m 1i 2, m 1i, m 2i, m1, m2, m 4i, m4p, m4 as macrochaetae; m4ip, m5, m5a and m5p as microsetae; m5a distant from other ‘m’ series setae, near to a 5i series (see Soto-Adames 2008); ‘p’ series with 16+16 to 17+17 setae, p 1i 2 absent; p 1i, p 1i 2p, p1, p1ip, p1p, p2a, p2p, p2e, p2ep, p3p and p3 as macrochaetae; p 1i absent in one specimen; p2, p2ea, p4, p5, p6, p6e as microsetae; three super-numerary macrochaetae near p6 (not drawn–see Soto-Adames 2008) ( Fig. 8 A).

Dorsal metathorax chaetotaxy. ‘a’ series with 8+8 setae; a1a, a3, a4, a5, a6, a7 as microsetae; a1 and a2 as macrochaetae; ‘m’ series with 7+7 setae; m 1i, m1, m4, m5, m6p and m7 as microsetae; m6 as macrochaetae; ‘p’ series with 8+8 setae; p2ea and p2e absent; p4, p5, p6 as microsetae (p6 appears as macrochaeta in one specimen); p 1i, p1, p2, p2a and p3 as macrochaetae ( Fig. 8 B).

Dorsal Abd. I chaetotaxy. ‘a’ series with 6+6 microsetae (a1, a1e, a2, a3, a5, a6); a1a absent; ‘m’ series with 6+6 setae; m4, m5 and m6 as microsetae; m2, m3 and m 4i as macrochaetae; ‘p’ series with 2+2 microsetae (p5 and p6); accessory seta present near a6 ( Fig. 8 C).

Dorsal Abd. II chaetotaxy. ‘a’ series with 6+6 setae, as absent; a2p, a3, a6 and a7 as microsetae; a2 as macrochaetae; a5 as trichobothrium with 7+7 fan shaped scales above it; ‘m’ series with 8+8 setae, m3ep absent; m 3ei, m3ea, m6 and m7 as microsetae; m3, m3e and m5 as macrochaetae; m2 as trichobothrium with 4 surrounding fan shaped scales; one super-numerary seta next m3ea; ‘p’ series with 3+3 setae; p5 and p7 as microsetae, p6 as mesochaeta; el and se setae as microsetae ( Fig. 8 D).

Dorsal Abd. III chaetotaxy. ‘a’ series with 8+8 setae; as and a3 as microsetae; am6 as macrochaeta; a1, a2 and a6 as fan shaped scales; a7 as mesochaeta; a5 as trichobothrium with 5 surrounding fan shaped scales; ‘m’ series with 6+6 setae, m3ea absent; m2 as trichobothrium with 4 surrounding fan shaped scales; m5 as trichobothrium with 5 surrounding fan shaped scales; m4 as fan shaped scales, m7 and one super-numerary seta near p7 as microseta; m3 as macrochaeta; ‘p’ series with 6+6 setae; p3 and p5 as microsetae; p 7i and p7 as mesochaetae; pm6 and p6 as macrochaetae; em, emp and c3 present as fan shaped scales; se as microsetae; d2 present as accessory seta, near p5 ( Fig. 9 A).

Dorsal Abd. IV chaetotaxy. ‘A’ series with 12+12 setae, A2a absent; A1, A2 and Ae7 as microsetae; A3a, A3, A4, A5 and A6 as macrochaetae; Four super-numerary microsetae, one near A3, one near A5 and two between A5 and A6; ‘B’ series with 8+8 setae, B4 absent; B1, B2, B6 and two super-numerary setae below B6 as microsetae; Be3, B3 and B5 as macrochaetae; ‘C’ series with 6+6 setae, C4a absent; C1 and C4 as macrochaetae; C1p, C2, C3 and a super-numerary seta near C4 as microsetae; ‘T’ series with 7+7 setae, T6 absent; T3, T5 and a supernumerary setae as microsetae; T1 and T7 as macrochaetae; T2 and T4 as trichobothrium, the first with 4 and the second with 3 surrounding fan shaped scales; ps absent; ‘D’ series with 5+5 setae, D2a absent; D1 as fan shaped scale; D2, D3p and a super-numerary seta near T2 as microsetae; D3 as trichobothria without surrounding fan shaped scales; ‘E’ series with 6+6 setae, E2a, E4p and E4p2 absent; E2, E2p and E3 as macrochaetae; E1 and E4 as microsetae; Ee10 present as macrochaetae distant from the line ‘E’, near F2p; ‘F’ series with 6+6 setae; F1p, F2, F2p, F3 and F3p as macrochaetae; F1 as microseta; ‘Fe’ series with 4+4 setae; Fe5 as macrochaetae; Fe2, Fe4 and Fe6 as microsetae; sequence of 11 setae at the end of the segment ( Fig. 9 B).

Distribution of dorsal macrochaetae of whole body as in Figure 9 C.

Etymology. The species was named for being the first collembolan species described from Chapada do Araripe. From Latin primaria = the first one.

Remarks. Seira primaria sp. nov. has the following combination of features that distinguishes it from other species of Seira : a unique arrangement of macrochaetae in Jacquemart’s cephalic regions 1, 2 and 3; associated to a particular pattern in regions 2 (m 1i 3, m 1i 2, m 2i, m 1i, m1 and m2), 3B and 3C (p2a, p2p, p2e, p2ep, p3p and p3) of the mesothorax and region C of the metathorax (m6 and p6). Seira primaria sp. nov. shows some similarities to two other species of the genus, S. pseudoannulata Bellini & Zeppelini, 2008b and S. paraibensis Bellini & Zeppelini, 2009a . The three species have three macrochaetae on Abd. I (m2, m3 and m 4i in the new species, possibly the same on the others) and lack macrochaetae in cephalic region 6. Seira primaria sp. nov. has also in common with S. pseudoannulata similarities in the Jacquemart’s regions 1B and 3A of the mesothorax, region B of the metathorax, Abd. II and region B of the Abd. III. A detailed comparison among the cited species of Seira is presented in Tables 2 and 3.The high number of chaetotaxic characters in common between S. primaria sp. nov. and S. paraibensis may be because of their near adjacent distributions and so possibly to common ancestry. Both areas are humid regions of Caatinga (Araripe/CE and Areia/PB, respectively), distant by only 450 km (Bellini & Zeppelini 2009). However, S. pseudoannulata was collected in a coastal region, in remains of Atlantic Rain Forest of Mataraca/PB ( Bellini & Zeppelini 2008b), while Seira primaria sp. nov. was collected at the beginning of the rainy season, directly from litter. The climate of the area is ‘As’ according to Koeppen system ( Kottek et al. 2006).

Figures

FIGURE 6. Seira primaria sp. nov.: A, habitus; B, apical region of Ant. IV; C, left eye patch; D, labial triangle setae (right side); E, Metatrochanteral organ; F, first empodial complex; G, second empodial complex; H, third empodial complex; I, distal dens and mucro. Symbols as for Figure 2.

FIGURE 7. Detailed dorsal head chaetotaxy of Seira primaria sp. nov. Symbols as for Figure 2.

FIGURE 8. Detailed dorsal chaetotaxy of Seira primaria sp. nov. (left side) A. Mesothorax; B. Metathorax; C. Abd. I; D. Abd. II. Symbols as for Figure 2.

FIGURE 9. Detailed dorsal chaetotaxy of Seira primaria sp. nov. A. Abd. III (left side); B. Abd. IV (left side); C. Distribution of dorsal macrochaetae (right side). Symbols as for Figure 2.