Seira diamantinae , Godeiro, Nerivânia N. & Bellini, Bruno C., 2015

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: 215-221

publication ID

http://dx.doi.org/10.11646/zootaxa.3972.2.4

publication LSID

lsid:zoobank.org:pub:E90A2B73-D681-4104-9FB9-279979295BE3

persistent identifier

http://treatment.plazi.org/id/03C287A9-FFED-FFAC-D5C0-FD255417FEA2

treatment provided by

Plazi

scientific name

Seira diamantinae
status

sp. nov.

Seira diamantinae  sp. nov.

Figs 6–10View FIGURE 6View FIGURE 7View FIGURE 8View FIGURE 9View FIGURE 10

Type Material. Holotype female, Brazil, Bahia, Abaíra, Chapada Diamantina, 1–6.xi. 2013. Bellini, B.C. and Ferreira, A.S. col. Paratypes 5 males and 4 females, same data as Holotype. Type material deposited at Collembola  Collection of DBEZ / UFRN.

Description. Total body length of Holotype 2,32 mm. Habitus entomobryid ( Figs 6View FIGURE 6, 7View FIGURE 7 A). Color of fixed specimens (in ethanol 100 %) pale yellow with dark pigment covering proximal regions of Ant. I –IV, eye patches and lateral borders of head, trochanters, proximal and distal regions of femora I –III, lateral borders of Th. II –III, and terminal Abd. IV –V ( Fig. 6View FIGURE 6). Colour of mounted specimens pale yellow. Brownish rounded scales covering body and head, legs, Ant. I –III, manubrium and dentes (ventrally). Ventral tube with scales. Ant. IV weakly annulated, with single apical bulb and bearing at least four types of setae: large smooth, small smooth, feathered and small blunt setae ( Fig. 7View FIGURE 7 B). Ant. III sense organ as in Fig. 7View FIGURE 7 C, with two rods and three guard sensillae. Eye patches oval with 8 + 8 lenses: ‘A’ lense largest and ‘G’ smallest ( Fig. 8View FIGURE 8).

Five interocular feathered mesosetae (p, q, r, s, t) ( Fig. 8View FIGURE 8). Pre –labral setae multiciliated; labral setae smooth. Maxillary palp with apical and basal setae smooth, subequal in size; sublobal plate with 2 smooth appendages ( Fig. 7View FIGURE 7 E). Labial papilla as in figure 7 E; lateral appendage acuminate; seta-like; and four smooth setae ( Fig. 7View FIGURE 7 F). Five smooth proximal setae of labial palp; labial triangle formula: M 1 M 2 rEL 1 L 2 /A 1-5; r smooth and reduced ( Fig. 7View FIGURE 7 D). Mesothoracic hood well developed ( Fig. 7View FIGURE 7 A). Metatrochanteral organ with approximately 37 short spines ( Fig. 7View FIGURE 7 G). All ungues with four teeth, two subequal basal paired teeth and two apical unpaired ( Fig. 7View FIGURE 7 H). Unguiculi lanceolate with smooth margins ( Fig. 7View FIGURE 7 H). Tenent hair capitate with weakly serrated edges. Ventral manubrium with 13 + 13 subapical setae, spines typically absent in furcula. Approximately 13 + 13 finger-like blunt multicilated setae present on distal manubrium and proximal dentes ( Fig. 7View FIGURE 7 I). Mucro typically falcate ( Fig. 7View FIGURE 7 J).

Dorsal head chaetotaxy. Antennal series (An) with 9 + 9 macrosetae; three super-numerary microseta between An 3 a and An 3 (atypical); anterior series (A) with A 4 present; A0, A 2 and A 4 as macrosetae; A 1, A 1 p (atypical) and A 3 as microsetae; medio-ocellar series (M) with 5 + 5 setae; M 1, M 2 and M 4 as macrosetae; M 3 and M 4 i as microsetae; sutural series (S) series with 6 + 6 macrosetae (S 1, S 2, S 3, S 4, S 5, S 6) plus unpaired S0; Interocular series with 5 + 5 mesosetae (p, q, r, s and t); post-sutural (Ps) series with 3 + 3 setae; Ps 2 and Ps 3 as microsetae, Ps 5 as macroseta; Ps 4 absent (typical of Seira  , see Soto-Adames 2008); postoccipital anterior (Pa) series with 6 + 6 setae; Pa 1, Pa 2, Pa 3 and Pa 4 as microsetae, Pa 5 as macroseta, Pa 6 as post ocular trichobothrium; postoccipital medium (Pm) series with 2 + 2 microseta (Pm 1 and Pm 3), Pm 2 absent (typical of Seira  , see Soto-Adames 2008); ‘Pp’ series with 5 + 5 setae; Pp 1, Pp 2, Pp 3 and Pp 4 as microseta; Pp 5 as macroseta ( Fig. 8View FIGURE 8).

Dorsal Th. II chaetotaxy. Anterior (a) series (without anterior setal collar) with 13 + 13 setae; a 2 p as microseta; a 4 e, a 4, a 4 i, a 4 i 2, a 4 i 3, a 4 i 4, a 5 i 2, a 5 i 2 p, a 5 ip, a 5 i, a 5, a 5 p as macrosetae; medial (m) series with 13 + 13 setae; m 1 i 3, m 4 ip, m 5 and m 5 p as microsetae; m 1 i 2, m 1 i, m 2 i, m 2 i 2, m 1, m 2, m 4 p, m 4 i and m 4 as macrosetae; m 5 a absent; one super-numerary macroseta next to m 5 p; posterior (p) series with 18 + 18 setae; p 1 i 2 p, p 1 i 2, p 1, p 1 ip, p 1 i, p 1 p, p 2 a, p 2, p 2 p, p 2 ep, p 3 p and p 3 as macrosetae; p 2 ea, p 4, p 5, p 6 and p 6 e as microsetae; p 2 e absent; three external macrosetae near p 6 (see Soto-Adames 2008) ( Fig. 9View FIGURE 9 A).

Dorsal Th. III chaetotaxy. ‘a’ series with 8 + 8 setae; a 1 a, a 1, a 3, a 4, a 5 and a 7 as microsetae; a 2 and a 6 as macrosetae; ‘m’ series with 5 + 5 setae; m 6 as macroseta; m 1, m 5, m 7 and m 6 p as microsetae; m 1 i and m 4 absent; ‘p’ series with 9 + 9 setae; p 3, p 4, p 5 and p 6 as microsetae; p 1 i, p 1, p 2, p 2 a and p 2 e as macrosetae; p 2 ea absent; setula present near m 7 ( Fig. 9View FIGURE 9 B).

Dorsal Abd. I chaetotaxy. ‘a’ series with 5 + 5 microsetae (a 1, a 2, a 3, a 5 and a 6); a 1 a, a 1 e and a 4 absent; setula present near a 6; ‘m’ series with 6 + 6 setae; m 5 and m 6 as microsetae; m 2, m 3, m 4 and m 4 i as macrosetae; ‘p’ series with 2 + 2 microsetae (p 5 and p 6) ( Fig. 9View FIGURE 9 C).

Dorsal Abd. II chaetotaxy. ‘a’ series with 7 + 7 setae; a 2 p, a 3, as, a 6 and a 7 as microsetae; a 2 as macrosetae; a 5 as trichobothrium with 5 surrounding fan shaped scales; ‘m’ series with 9 + 9 setae; m 3 ei, m 3 ea, m 6 and m 7 as microsetae; m 3, m 3 ep, m 3 e and m 5 as macrosetae; m 2 as trichobothrium with 4 surrounding fan shaped scales; ‘p’ series with 3 + 3 setae; p 5 and p 7 as microsetae; p 6 as macroseta; el and se present as setulae ( Fig. 9View FIGURE 9 D).

Dorsal Abd. III chaetotaxy. ‘a’ series with 8 + 8 setae; as, a 3 and a 7 as microsetae; am 6 as macroseta; a 1, a 2 and a 6 as fan shaped scales; a 5 as trichobothrium with 5 surrounding fan shaped scales; ‘m’ series with 6 + 6 setae; m 2 as trichobothrium with 5 surrounding fan shaped scales; m 5 as trichobothrium with 7 surrounding fan shaped; m 4 and m 3 ea as fan shaped scales; m 7 as mesoseta; m 3 as macroseta; ‘p’ series with 6 + 6 setae; p 3, p 5 and p 7 as microsetae; p 7 i as mesoseta; pm 6 and p 6 as macrosetae; em and emp as fan shaped scales; c 3 as fan shaped scale; el as mesoseta; se as setula; d 2 setula present, near p 5 ( Fig. 10View FIGURE 10 A).

Dorsal Abd. IV chaetotaxy. ‘A’ series with 9 + 9 setae; A 1 and A 5 as microsetae; A 2 a, A 2, A 3 a, A 3, A 4, A 6 and Ae 7 as macrosetae; two super-numerary microsetae above and below Ae 7. ‘B’ series with 6 + 6 macrosetae (B 1, B 2, B 3, B 4, B 5 and B 6); one super-numerary microseta below B 6; Be 2 and Be 3 absent; ‘C’ series with 3 + 3 or 4 + 4 setae; C 1 p and C 4 a absent; C 4 as macrosetae; C 1, C 2 and C 3 as microsetae; C 1 may be absent in some specimens; ‘T’ series with 6 + 6 setae; T 1 absent; T 3, T 5, T 6 and T 7 as microsetae; T 2 and T 4 as trichobothria with 6 and 3 (respectively) fan shaped scales above each of them; ps absent; ‘D’ series with 5 + 5 setae; D 1 as fan shaped scale; D 2 a and D 3 p as microsetae; D 2 as macroseta; D 3 as trichobothria without fan shaped scales associated; ‘E’ series with 5 + 5 setae; E 2 a, E 3 and E 4 p absent; E 2, E 4 and E 4 p 2 as macrosetae; E 1 and E 2 p as microsetae; Ee 7 and Ee 10 also absent; ‘F’ series with 6 + 6 macrosetae (F 1, F 1 p, F 2, F 2 p, F 3, F 3 p); ‘Fe’ series with 4 + 4 setae; Fe 2 and Fe 2 p absent; Fe 3 and Fe 4 as macrosetae; Fe 5 and Fe 6 as microsetae; four external microsetae after ‘Fe’ series; Abd. IV with 4 + 4 posterior setae ( Fig. 10View FIGURE 10 B).

Distribution of dorsal macrosetae of whole body as in Figure 10View FIGURE 10 C.

Etymology. The species was named after “Chapada Diamantina National Park”, where the type species was collected; diamantinae  also refers to “made of diamonds” in Latin.

Remarks. Seira diamantinae  sp. nov. belongs to a very distinct group of Seira  species with larger individuals bearing modified blunt macrosetae on distal manubrium and proximal dens. This particular group was described by Arlé (1959) as the genus Ctenocyrtinus, but it was synonymized as Seira  by Christiansen & Bellinger (2000). This same group was simultaneously described as the subgenus Lepidocyrtinus Börner  by Yosii (1959), but at the present time the use of Seira  subgenera has been left out of descriptions (see more in Bellini & Zeppelini 2011 b). In either case, a phylogenetic approach to this group among the Seirini  is urgent since it would shed light to the true position of these species inside the tribe.

The neotropical species which present the blunt modified setae on furca are: S. prodiga ( Arlé, 1959)  , S. xinguensis ( Arlé, 1959)  , S. nigrans ( Arlé, 1959)  , S. harena Godeiro & Bellini, 2014  and S. diamantinae  sp. nov. The last species can be readily distinguished from the others by the combination of the following characters: presence of six macrosetae in Jacquemart’s region 1 A of Th. II (a 4 e, a 4, a 4 i, a 4 i 1, a 4 i 2, a 4 i 3 and a 4 i 4); presence of four macrosetae in Abd. I (m 2, m 3, m 4 i and m 4); and presence of two macrosetae in Jacquemart’s region B of Abd II (m 5 and p 6). From all described species, S. harena  resembles most S. diamantinae  sp. nov. specially in: the arrangement and quantity of macrosetae in the Jacquemart’s cephalic region 2 (A0, A 2 and A 4); absence of macrosetae in Jacquemart’s cephalic region 6; and in macrosetae in Abd. III (m 3, am 6, pm 6 and p 6).

S. diamantinae  sp. nov. was collected in Caatinga biome, in Chapada Diamantina National Park. The region represents a high-altitude wetland ingrown in the middle of the semi-arid landscape; Good’s biogeographic zone 27 ( Good 1974). The specimens were collected during the rainy season. The climate of the area is “ As ” following Koeppen’s system, with a dry summer ( Kottek et al. 2006).