Seira jiboiensis, 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 : 132-139

Seira jiboiensis sp. nov.

Figs. 2 , 3 , 4 and 5

Type Material. Holotype male, Brazil, Bahia, Santa Terezinha, Serra da Jibóia, 07.xi.2010 ( Fig. 1 ). 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 1.25 mm. Habitus entomobryid ( Fig. 2 A). Colour of mounted specimens pale yellow, with two unpaired dark blue spots on head and paired ones on posterolateral margin of Abd. III ( Fig. 2 A), eye patches black. Rounded brownish scales covering Ant. I and II, basal half of Ant. III and IV, head, thorax, abdomen, legs, manubrium (dorsally) and dentes (ventrally). Ventral tube without scales. Ant. IV not annulated, with a single apical bulb, several multiciliated setae, some small smooth setae and some blunt s-setae ( Fig. 2 B). Eye patches oval with 8+8 lenses; ‘A’ and ‘B’ lenses largest and G smallest ( Fig. 2 C). Five interocular multiciliated setae, ‘p’ as macrochaeta, ‘q’, ‘r’, ‘s’ and ‘t’ as mesochaetae ( Fig. 2 C). Pre-labral and labral setae smooth. Labial triangle setae ‘M1’, ‘M2’ and ‘E’ multiciliated, ‘r’ apparently smooth, reduced ( Fig. 2 D), ‘L1’, ‘L2’ multicilated (not drawn). Metatrochanteral organ with approximately 16 short spines ( Fig. 2 E). All ungues with four teeth, two subequal basal paired teeth and two internal, apical unpaired, the internal row with different relative distances from each other between the three legs ( Figs. 2 F-H). Unguiculi lanceolate with slightly serrated posterior edges ( Figs. 2 F-H). Tenent hair capitate with weakly serrated edges. Ventral manubrium with 4+4 subapical setae, spines typically absent on furcula. Mucro typically falcate ( Fig. 2 I).

Dorsal head chaetotaxy. ‘An’ series with 7+7 macrochaetae; one super-numerary microseta between An1 and An2; ‘A’ series with A4 present; A0, A2, A3 and A5 as macrochaetae; A1 and A4 as microsetae; ‘M’ series with 4+4 setae; M1 absent; M2 and M4 as macrochaetae; M3 and M 4i as microsetae; ’S’ series with S4 absent; S0, S2, S3 and S6 as macrochaetae; S5 and a super-numerary seta near S6 as microseta; Interocular series with 5+5 setae; p as macrochaeta; q, r, s t as mesosetae; ‘Ps’ series with 3+3 microsetae; Ps4 absent (typical of Seira , see Soto- Adames 2008); ‘Pa’ series with 7+7 setae; Pa1 and a super-numerary seta near Pa4 as microseta; Pa2, Pa3, Pa4 and Pa5 as macrochaeta and Pa6 as post ocular trichobothrium; ‘Pm’ series with 2+2 setae, Pm2 absent (typical of Seira , see Soto-Adames 2008); Pm1 as microseta and Pm3 as macrochaeta; ‘Pp’ series with 4+4 setae; Pp4 absent; Pp3 as macrochaeta; Pp1, Pp2 and Pp5 as microsetae ( Fig. 3 ).

Dorsal mesothorax chaetotaxy. ‘a’ series (without anterior setal collar) with 7+7 setae; a2p as microseta; a 5i 2, a 5i 2p, a5ip, a 5i, a5, a5p as macrochaetae; ‘m’ series with 12+12 setae; m 1i 3, m 2i 2 absent; m 1i 2, m 1i, m4ip, m5a, m5, m5p and a super-numerary seta near m5 as microsetae (m5e?); m 2i, m1, m2, m 4i, m4p, m4 as macrochaetae; m5p distant from other ‘m’ series setae, near ‘p’ series (see Soto-Adames 2008); ‘p’ series with 15+15 to 16+16 setae; p2ea and p4 absent; p 1i 2, p 1i, p1, p1ip, p1p, p2a, p2, p2p, p2e, p2ep, p3p, p3 and p5 as macrochaetae; p 1i 2p, p6, p6e as microseta; p 1i 2p absent in one specimen; three super-numerary macrochaetae near p6 (not drawn–see Soto-Adames 2008) ( Fig. 4 A).

Dorsal metathorax chaetotaxy. ‘a’ series with 7+7 setae; a1a absent; a3, a6 and a7 as microsetae; a1, a2, a4 and a5 as macrochaetae; ‘m’ series with 6+6 setae; m1 absent; m 1i and m6 as macrochaetae; m4, m5 and m7 as microsetae; m6p as mesochaeta; ‘p’ series with 9+9 setae; p 1i absent; p2ea, p4, p5, p6 as microsetae; p1, p2, p2a, p2e and p3 as macrochaetae; accessory seta present near m7 ( Fig. 4 B).

Dorsal Abd. I chaetotaxy. ‘a’ series with 7+7 setae; a4 absent; a1, a1a, a1e, a2, a3 and a6 as microsetae; a5 as macrochaetae; accessory seta present near a6; ‘m’ series with 5+5 setae; m6 absent; m5 as microsetae; m2, m3, m4 and m 4i as macrochaetae; ‘p’ series with 2+2 microsetae (p5 and p6) ( Fig. 4 C).

Dorsal Abd. II chaetotaxy. ‘a’ series with 6+6 setae; a2p absent; a3, as, a6 and a7 as microsetae; a2 as macrochaetae; a5 as trichobothrium with 5 surrounding fan shaped scales; ‘m’ series with 7+7 setae; m3ep and m3ea absent; m 3ei, m6 and m7 as microsetae; m3, m3e and m5 as macrochaetae; m2 as trichobothrium with 3 surrounding fan shaped scales; ‘p’ series with 3+3 setae; p5, p6 and p7 as microsetae; el and se present as microsetae ( Fig. 4 D).

Dorsal Abd. III chaetotaxy. ‘a’ series with 7+7 setae; a7 absent; as, a3 and a6 as microsetae; am6 as macrochaeta; a1 and a2 as fan shaped scales; a5 as trichobothrium with 5 surrounding fan shaped scales; ‘m’ series with 5+5 setae; m3ea absent; m2 as trichobothrium with 5 surrounding fan shaped scales; m5 as trichobothrium with 3 surrounding fan shaped; m4 as fan shaped scale, m7 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 as fan shaped scales; se as microsetae; d2 accessory seta present, near p5 ( Fig. 5 A).

Dorsal Abd. IV chaetotaxy. ‘A’ series with 9+9 to 10+10 setae; A1, A2a, A2, A3a, A6, Ae7 and one supernumerary seta between A4 and A5 as microsetae; A2a lacking in one specimen; A3, A4 and A5 as macrochaetae; ‘B’ series with 6+6 setae; B1 absent; B2 and one super-numerary seta near B4 as microsetae; B3, B4, B5 and B6 as macrochaetae; ‘C’ series with 5+5 setae; C4a absent; C1 and C4 as macrochaetae; C1p, C2 and C3 as microsetae; ‘T’ series with 7+7 setae; T1, T3, T5 and T6 as microsetae; T7 as mesochaetae; T2 and T4 as trichobothria with 3 fan shaped scales above each of them; ps present as accessory microsetae; ‘D’ series with 4+4 setae; D1 as fan shaped scale; D2a absent; D2 as microsetae; D3 as trichobothria without fan shaped scales associated; D3p as mesochaeta; ‘E’ series with 5+5 setae; E1, E2a, E10p and E4p2 absent; E2, E2p and E3 as macrochaetae; E4 and E4p as microsetae; ‘F’ series with 6+6 macrochaetae; ‘Fe’ series with 5+5 macrochaetae plus one super-numerary microseta near Fe6; sequence of nine setae at the end of the segment ( Fig. 5 B).

Distribution of dorsal macrochaetae of whole body as in Figure 5 C.

Etymology. The species was named after the type locality, Serra da Jibóia.

Remarks. Seira jiboiensis sp. nov. can be clearly distinguished from other neotropical Seira species by the combination of the following characteristics: a unique pattern of chaetotaxy on Jacquemart’s (1974) cephalic regions 4B and 6; presence of three macrochaetae (m 2i, m1 and m2) on Jacquemart’s (1974) region 2 of the mesothorax and the presence of three macrochaetae (p3, a4 and a5) on Jacquemart’s region C of the metathorax. However, the general configuration of dorsal chaetotaxy of S. jiboiensis sp. nov. shows some similarities with S. mendoncea Bellini & Zeppelini 2008a and S. ritae Bellini & Zeppelini 2011a , mainly on the Abd. I, which shows 5+5 macrochaetae on the three species (m2, m3, m 4i, m4 and a5) in the new species, possibly the same in S. mendoncea and S. ritae . Seira mendoncea is also similar to S. jiboiensis sp. nov. in Jacquemart’s regions 3A and 3B of the mesothorax; metathorax regions A and B; region B of Abd. II and region A of Abd. III. These three species also share similarities in other features like the presence of a bilobed apical bulb, presence of labial triangle setae "r" and unguiculi acuminate. A detailed comparison between the cited species of Seira is presented in Tables 2 and 3. All these features and the near distribution of the three species (presented in the next paragraph) suggest phylogenetic approximation between them.

Seira jiboiensis sp. nov. and S. mendoncea were collected in humid areas of Caatinga (Serra da Jibóia/BA and Cacimba de Dentro/PB, respectively), whereas S. ritae was collected in the Praia do Bessa/PB on sand dunes. Seira jiboiensis sp. nov. was collected during the wet season, in litter and soil samples. The climate of the region according to Koeppen system is type ‘As’, characterised by a peculiar long, dry, summer and a short wet winter ( Kottek et al. 2006).

Species Head Mesothorax Metathorax

1 2 3 4A 4B 4C 5 6 1A 1B 2 3A 3B 3C A B C S. harena sp. nov. 8 5 5 2 2 0 2 0 4 6 5 3 2 0 2 1 1 S . jiboiensis sp. nov. 6 7 8 2 2 1 6 0 4 5 3 5 3 5 4 3 3 S . mendoncea 8 7 2 2 4 3 3 4 2 3 4 5 3 6 4 3 4 S . paraibensis 9 7 9 2 2 1 1 0 2 2 6 5 4 6 4 3 0 S . primaria sp. nov. 6 7 8 2 2 1 4 0 5 3 6 5 3 3 4 3 2 S . prodiga 5 5 5 2 2 1 1 0 8 0 6 7 3 3 5 2 1 S . pseudoannulata 8 7 7 3 3 1 1 0 7 3 6 5 2 11 1 3 3 S . ritae 7 5 4 2 4 3 7 4 5 3 6 5 3 4 4 3 4

continued.

Species Abd. I Abd. II Abd.III Abd. IV

Figures

FIGURE 1. Map of Brazil showing Federal States of northeastern region. The grey area indicates the municipalities where the species were collected.

FIGURE 2. Seira jiboiensis sp. nov.: A, habitus; B, apical region of Ant. IV; C, left eye patch; D, labial triangle setae (left side); E, Metatrochanteral organ; F, first empodial complex; G, second empodial complex; H, third empodial complex; I, distal dens and mucro. Large empty circles refer to macrochaetae; half white half black large circles to mesochaetae; small black circles to microsetae; large empty circles with a small black circle inside to micro or macrochaetae; large black circles with a small cross line to pseudopores; long multiciliated setae to trichobothria; triangle like setae near trichobothria to fan-shaped scales; small black pointed setae to accessory setae (more details in Soto-Adames 2008).

FIGURE 3. Detailed dorsal head chaetotaxy of Seira jiboiensis sp. nov. Symbols as for Figure 2.

FIGURE 4. Detailed dorsal chaetotaxy of Seira jiboiensis sp. nov. (left side) A. Mesothorax; B. Metathorax; C. Abd. I; D. Abd. II. Symbols as for Figure 2.

FIGURE 5. Detailed dorsal chaetotaxy of Seira jiboiensis sp. nov. A. Abd. III (left side); B. Abd. IV (left side); C. Distribution of dorsal macrochaetae (right side). Symbols as for Figure 2.

Tables

TABLE 2. Main morphological characteristics of cited Seira species. (A-) minor apical; (M +) larger medial; (+) presence; (-) absence; (+ -) = present but not clearly observed or weakly annulated; LANC = Lanceolate; TRUN = Truncate.

Species	Lobes on antennal apical bulb	Clear annulations on 4th segment of antennae	Modified blunt setae at base of dentes	Unguiculus shape	Distinctly larger inner ungual teeth	Number ventral manubrial subapical setae
S harena sp. nov.	1	-	+	LANC	-	7
S. jiboiensis sp. nov.	2	-	-	LANC	-	4
S. mendoncea	1	-	-	LANC	M+, A-	5
S. paraibensis	2	+ -	-	TRUN	M+, A-	8
S. primaria sp. nov.	2	+-	-	LANC	-	4
S. prodiga	2–3	+ -	+	LANC	-	2
S. pseudoannulata	1	+	-	TRUN	-	6
S. ritae	1	-	-	LANC	M+, A-	4