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 ‘M 1 ’, ‘M 2 ’ and ‘E’ multiciliated, ‘r’ apparently smooth, reduced ( Fig. 2 D), ‘L 1 ’, ‘L 2 ’ 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 An 1 and An 2; ‘A’ series with A 4 present; A0, A 2, A 3 and A 5 as macrochaetae; A 1 and A 4 as microsetae; ‘M’ series with 4 + 4 setae; M 1 absent; M 2 and M 4 as macrochaetae; M 3 and M 4 i as microsetae; ’S’ series with S 4 absent; S0, S 2, S 3 and S 6 as macrochaetae; S 5 and a super-numerary seta near S 6 as microseta; Interocular series with 5 + 5 setae; p as macrochaeta; q, r, s t as mesosetae; ‘Ps’ series with 3 + 3 microsetae; Ps 4 absent (typical of Seira , see Soto- Adames 2008); ‘Pa’ series with 7 + 7 setae; Pa 1 and a super-numerary seta near Pa 4 as microseta; Pa 2, Pa 3, Pa 4 and Pa 5 as macrochaeta and Pa 6 as post ocular trichobothrium; ‘Pm’ series with 2 + 2 setae, Pm 2 absent (typical of Seira , see Soto-Adames 2008); Pm 1 as microseta and Pm 3 as macrochaeta; ‘Pp’ series with 4 + 4 setae; Pp 4 absent; Pp 3 as macrochaeta; Pp 1, Pp 2 and Pp 5 as microsetae ( Fig. 3).

Dorsal mesothorax chaetotaxy. ‘a’ series (without anterior setal collar) with 7 + 7 setae; a 2 p as microseta; a 5 i 2, a 5 i 2 p, a 5 ip, a 5 i, a 5, a 5 p as macrochaetae; ‘m’ series with 12 + 12 setae; m 1 i 3, m 2 i 2 absent; m 1 i 2, m 1 i, m 4 ip, m 5 a, m 5, m 5 p and a super-numerary seta near m 5 as microsetae (m 5 e?); m 2 i, m 1, m 2, m 4 i, m 4 p, m 4 as macrochaetae; m 5 p distant from other ‘m’ series setae, near ‘p’ series (see Soto-Adames 2008); ‘p’ series with 15 + 15 to 16 + 16 setae; p 2 ea and p 4 absent; p 1 i 2, p 1 i, p 1, p 1 ip, p 1 p, p 2 a, p 2, p 2 p, p 2 e, p 2 ep, p 3 p, p 3 and p 5 as macrochaetae; p 1 i 2 p, p 6, p 6 e as microseta; p 1 i 2 p absent in one specimen; three super-numerary macrochaetae near p 6 (not drawn–see Soto-Adames 2008) ( Fig. 4 A).

Dorsal metathorax chaetotaxy. ‘a’ series with 7 + 7 setae; a 1 a absent; a 3, a 6 and a 7 as microsetae; a 1, a 2, a 4 and a 5 as macrochaetae; ‘m’ series with 6 + 6 setae; m 1 absent; m 1 i and m 6 as macrochaetae; m 4, m 5 and m 7 as microsetae; m 6 p as mesochaeta; ‘p’ series with 9 + 9 setae; p 1 i absent; p 2 ea, p 4, p 5, p 6 as microsetae; p 1, p 2, p 2 a, p 2 e and p 3 as macrochaetae; accessory seta present near m 7 ( Fig. 4 B).

Dorsal Abd. I chaetotaxy. ‘a’ series with 7 + 7 setae; a 4 absent; a 1, a 1 a, a 1 e, a 2, a 3 and a 6 as microsetae; a 5 as macrochaetae; accessory seta present near a 6; ‘m’ series with 5 + 5 setae; m 6 absent; m 5 as microsetae; m 2, m 3, m 4 and m 4 i as macrochaetae; ‘p’ series with 2 + 2 microsetae (p 5 and p 6) ( Fig. 4 C).

Dorsal Abd. II chaetotaxy. ‘a’ series with 6 + 6 setae; a 2 p absent; a 3, as, a 6 and a 7 as microsetae; a 2 as macrochaetae; a 5 as trichobothrium with 5 surrounding fan shaped scales; ‘m’ series with 7 + 7 setae; m 3 ep and m 3 ea absent; m 3 ei, m 6 and m 7 as microsetae; m 3, m 3 e and m 5 as macrochaetae; m 2 as trichobothrium with 3 surrounding fan shaped scales; ‘p’ series with 3 + 3 setae; p 5, p 6 and p 7 as microsetae; el and se present as microsetae ( Fig. 4 D).

Dorsal Abd. III chaetotaxy. ‘a’ series with 7 + 7 setae; a 7 absent; as, a 3 and a 6 as microsetae; am 6 as macrochaeta; a 1 and a 2 as fan shaped scales; a 5 as trichobothrium with 5 surrounding fan shaped scales; ‘m’ series with 5 + 5 setae; m 3 ea absent; m 2 as trichobothrium with 5 surrounding fan shaped scales; m 5 as trichobothrium with 3 surrounding fan shaped; m 4 as fan shaped scale, m 7 as microseta; m 3 as macrochaeta; ‘p’ series with 6 + 6 setae; p 3 and p 5 as microsetae; p 7 i and p 7 as mesochaetae; pm 6 and p 6 as macrochaetae; em, emp and c 3 as fan shaped scales; se as microsetae; d 2 accessory seta present, near p 5 ( Fig. 5 A).

Dorsal Abd. IV chaetotaxy. ‘A’ series with 9 + 9 to 10 + 10 setae; A 1, A 2 a, A 2, A 3 a, A 6, Ae 7 and one supernumerary seta between A 4 and A 5 as microsetae; A 2 a lacking in one specimen; A 3, A 4 and A 5 as macrochaetae; ‘B’ series with 6 + 6 setae; B 1 absent; B 2 and one super-numerary seta near B 4 as microsetae; B 3, B 4, B 5 and B 6 as macrochaetae; ‘C’ series with 5 + 5 setae; C 4 a absent; C 1 and C 4 as macrochaetae; C 1 p, C 2 and C 3 as microsetae; ‘T’ series with 7 + 7 setae; T 1, T 3, T 5 and T 6 as microsetae; T 7 as mesochaetae; T 2 and T 4 as trichobothria with 3 fan shaped scales above each of them; ps present as accessory microsetae; ‘D’ series with 4 + 4 setae; D 1 as fan shaped scale; D 2 a absent; D 2 as microsetae; D 3 as trichobothria without fan shaped scales associated; D 3 p as mesochaeta; ‘E’ series with 5 + 5 setae; E 1, E 2 a, E 10 p and E 4 p 2 absent; E 2, E 2 p and E 3 as macrochaetae; E 4 and E 4 p as microsetae; ‘F’ series with 6 + 6 macrochaetae; ‘Fe’ series with 5 + 5 macrochaetae plus one super-numerary microseta near Fe 6; 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 4 B and 6; presence of three macrochaetae (m 2 i, m 1 and m 2) on Jacquemart’s (1974) region 2 of the mesothorax and the presence of three macrochaetae (p 3, a 4 and a 5) 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 2008 a and S. ritae Bellini & Zeppelini 2011 a , mainly on the Abd. I, which shows 5 + 5 macrochaetae on the three species (m 2, m 3, m 4 i, m 4 and a 5) 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 3 A and 3 B 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 4 A 4 B 4 C 5 6 1 A 1 B 2 3 A 3 B 3 C 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

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