Salina thibaudi, Soto-Adames, Felipe N., 2010

Soto-Adames, Felipe N., 2010, Review of the New World species of Salina (Collembola: Paronellidae) with bidentate mucro, including a key to all New World members of Salina, Zootaxa 2333, pp. 26-40 : 35-38

Salina thibaudi n. sp.

Material Examined: Guadeloupe. All collections by J.M. Thibaud, locality codes (e.g., G.#) as in Thibaud & Massoud (1979) and Massoud & Thibaud (1980) — Holotype, male G.194: near pond, south of Caraque, 5 km east of Point-a-Pitre, on coconut on the ground; 29 January 1980, slide mounted. Paratypes, all females. G.23: Boisvin-Masselas, 4 km west of Grands-Fonds, 60m elevation; meadow, under stone in dry pond; 9 March 1977; 1 slide-mounted juvenile. G.173: near Tombeau pond, 3 km north-northeast of Gosier; on coconut on the ground; 15 January 1980; 2 slide-mounted. G.195: close to pond southwest of Caraque; in mango tree litter; 29 January 1980; 1 slide-mounted. G.196: near pond at Boire, 1 km west of Cocoyer; leaf litter of breadfruit and flower of banana tree; 29 January 1980; 1 slide-mounted juvenile. Costa Rica. Cartago, El Salvador; 14 June 2004; C. Guillén, coll.; 1 slide-mounted.

Description: Length to 1.7 mm (smallest= 1.2 mm; average= 1.4 mm; n= 8). Background colour yellowish green, dorsal head pattern formed by narrow blue band along marginal circumference, wider near eyes and between antennae; mesothorax with a scatter of blue and narrow anterior and lateral stripe along margins; Th. 3–Abd. 5 with dark blue spots with irregular outer edges and unpigmented centres (i.e., Folsom’s amoeboid spots, Fig. 12 ), corresponding to macrosetal insertions; ventral pattern formed by scattered light blue pigment on posterior two thirds of head, extending back in an irregular pattern through out all sterna, with higher density just posterior to metathoracic legs and on depression formed to accommodate furcula; antennae light blue, pigment forming rings distally on Ant. 1–3; femora with anterior blue longitudinal bands, one distal ring on femora, and one basal and one distal ring on tibiotarsi. Ant. 1 ( Fig. 27 ) with 4 (3–5) dorsal macrosetae. Prelabral setae 4. Postlabial column CG with 9 setae (7–10), of which 3 (2–4) are short and smooth ( Fig. 5 ). Macrochaetotaxy of Th. 2–Abd. 2 as 7(7–8), 6(5–9), 4(3–6), 2 ( Figs. 28–31 ): Th. 2 with a supplementary macroseta posterior to seta number 3. One individual with 9 paired macrosetae on Abd. 4; 3 individuals with unpaired macrosetae inserted in differing patterns on each individual, but always in general area marked by arrow heads in Fig. 32 . Abd. 4 with 4+4 (3–5, 1 individual with 7) posterior setae. Anterior face of collophore with 3 (4) distal macrosetae and 4 (3–6) microsetae, lateral setae 8–20, but region partially obscured in most individuals and actual number of setae difficult to ascertain (individual with 8 setae is 1.2 mm long, the smallest individual for which number of setae could be determined with confidence), posterior face of collophore ( Fig. 33 ) with 2+2 (1+1–4+4) short ciliate setae in row parallel to distal margin (joined by dotted lines in Fig. 33 ) and 1+1 (or 2+2) perpendicular to the distal margin. Proportion of dens/manubrium≈ 1.2; proportion of dental vesicle/mucro≈ 1. Mucro bidentate, most individuals with both teeth worn (1 individual 14 M= macrosetae. (2) Prelabral setae are ciliate in all species studied. (3) Setae along ventral groove. (4) Chaetotaxy from Yoshi 1981. (5) Parentheses show variation observed when more than 2 individuals were examined. (6) All individuals with 3 setae on one side of the body had 4 or more setae on the other side. (7) ARG= Argentina; BRA= Brazil; COL= Colombia; CR= Costa Rica; CUB= Cuba; GUAD= Guadeloupe; MEX = Mexico; PAN= Panama; PR= Puerto Rico; USA = United States. (8) Species groups: W= beta , celebensis ; B= borneensis.

Remarks: Salina thibaudi n. sp. differs from all other species with bidentate mucro by the combined presence of 4 dorsal macrosetae on Ant. 1, 4 prelabral setae, 7 macrosetae on Th. 2, 6 on Th. 3, and at least 4 posterior setae on Abd. 4. Additional differences with other species are listed in Table 1 .

Figures

FIGURES 1 – 12. 1 – 4 Salina wolcotti; 1. Detail of left eye patch; 2. Dorsal head chaetotaxy, arrow heads point at variable macrosetae (see text); 3. Prelabral and labral chaetotaxy, arrows point at spine-like setae; 4. Labial papilla E; 5. Postlabial chaetotaxy in S. thibaudi n. sp., circles represent ciliate microsetae similar to seta PLE 2 illlustrated, CG = Cephalic Groove column, PLM and PLE = Post Labial Medial and External columns, respectively; 6 – 8. Mucro and distal dental vesicle: 6. S. tristani; 7. S. banski; 8 a. S. wolcotti; 8 b. Pseudosalina nigrocephala (after Mitra 1974); 9. Chaetotaxy of left side of Abd. 4 in S. wolcotti, large circles represent macrosetae, small circles near posterior margin are mesosetae, dots are posterior setae, dotted lines join macrosetae present in all species in the beta group; 10. Relative length of Abd. 4 bothriotricha and bothriotricha-like setae in S. wolcotti, letters refer to position in Fig. 9; 11. S. ventricolor colour pattern (after Gruia 1983); 12. S. wolcotti, colour pattern (after Folsom 1927)

FIGURES 25 – 33. All figures show left aspect; arrowheads identify macrosetae absent or reduced in some individuals. 25 – 26 Salina beta; 25. Schematic distribution of macrosetae on Th. 2 – Abd. 2; 26. Th. 2; 27 – 33 S. thibaudi n. sp.; 27. Ant. 1; 28. Schematic distribution of macrosetae on Th. 2 – Abd. 2; 29. Th. 2; 30. Th. 3, setae 1 b, 2 b and 5 b are absent in most individuals examined; 31. Abd. 1; 32. Abd. 4, circles are macrosetae, dots are posterior setae; 33. Posterior chaetotaxy of collophore.

Tables

TABLE 1. Diagnostic table for the species of the genus Salina reported from the Americas.

Species (species group) 8	Ant.1 M 1	Pre-Lm setae 2	Post Lb 3	Th. 2 M	Th. 3 M	Abd. 1 M	Abd. 2 M	Abd. 4 posterior setae	Collophore posterior setae	Mucro shape	Unguiculus shape
beta USA 7 (W) bidentata	2 3 (2) 5	2 2	obscured 5 (4)	4 6 (5–7)	6 6	4 4 (2–4)	1,1 1,1	4 3	1 2+2	rectangular 3 teeth rectangular	truncate truncate
CR, USA (W) thibaudi n. sp.	4	4	9 (7–10)	Fig. 15 7 (8)	Fig. 18 6 (5–9)	4 (3–6)	1,1	4 (3 6 –7)	3+3 (3–6);	2–3 teeth rectangular	truncate
CR, GUAD (W) ventricolor	?	?	?	Fig. 14 5	Fig. 18 5	3	1,1	?	1–3 unpaired?	2–3 teeth rectangular	truncate
CUB (W)				Fig. 17	Fig. 21					2–3 teeth
wolcotti	2 (3)	2	5 (3–6)	3 (3–5)	4 (2–4)	2 (2–3)	1,1	3	1+1	rectangular	truncate
PR (W) sp. A	3–4	4	7–8	Fig. 16 6	Fig. 20 4	2	2,1	2	2+2	2–3 teeth rectangular	truncate
PAN (W)				Fig. 14	Fig. 19					2 teeth
banski	6	4	?	8	6	2	2,1	6	8+8	square	truncate
USA (C) celebensis 4 ARG, BRA (C)	?	4	?	1	2	2	2,1	3?	8+8	3 teeth square 3 teeth	truncate
decorata	?	?	?	8	6	2	2,1	?	?	square	truncate
USA (C)										3 teeth
dedoris COL (C)	4	4	8–9	6	8	3	2,1	0	2+2; 0–1 unpaired	square 3–4 teeth	truncate
hermana	4	4	8–9	6	8	3	2,1	0	2+2; 0–1	square	truncate
COL (C) panamae	?	?	?	1	3	2	2,1	?	unpaired?	3–4 teeth square	truncate
PAN (C)										3–4 teeth
trilobata	?	?	?	?	?	?	?	?	?	square	truncate
MEX (C)										3 teeth
tristani CR, PR (C)	4	4	7 (6–8)	6–8	7 (6–10)	3 (2–6)	2,1	0	4+4 (5)	square 3–4 teeth	truncate
sp. B	3	4	7–8	3	5 (6)	2 (3)	2,1	0	1+1 (2)	square	truncate
MEX (C)										3 teeth
sp. D USA (C)	6–7	4	5–6	12–15	7–8	4	2,1	5–6	6+6 (7); 1–2 unpaired	square 3 teeth	truncate
mulcahyae	?	?	?	?	?	13	2,2	?	?	square	lanceolate
USA (B)										3 teeth
sp. C MEX (B)	7–6	4	8–12	≈35	21–24	8–9	2,2	11–13	Up to 40 total	square 3 teeth	truncate