Galendromimus ( Galendromimus ) striatusornatus Santos, Demite & Lofego, 2025

Santos, Amanda Conceição dos, Demite, Peterson Rodrigo, Nuvoloni, Felipe Micali & Lofego, Antonio Carlos, 2025, Two new Galendromimus species (Acari, Phytoseiidae) from Brazil, with a world key and distributional notes on the tribe Galendromimini, ZooKeys 1260, pp. 213-231 : 213-231

Galendromimus ( Galendromimus) striatusornatus Santos, Demite & Lofego sp. nov.

Figs 4 , 5 , 6

Type specimens.

Holotype: Brazil; 1 ♀; Reserva Ecológica Michelin , Igrapiúna, Bahia; 13°49'17.2"S, 39°11'55.1"W; 3 Jul. 2023; A. C. Santos leg.; on Henriettea succosa (Aubl.) DC. Paratype: 2 ♂♂, same data as holotype .

Diagnosis.

Idiosomal setal pattern (11 D: 6 B; JV- 4: ZV- 3). Dorsal shield ornamentation between setae Z 4 and Z 5 characterised by each reticle including a series of parallel ridges perpendicular to the longest margin; setae z 2, z 4, z 5, Z 1, s 4, j 1, j 3, j 4, j 6, and J 2 smooth; setae s 6 and J 5 slightly serrate; Setae Z 4 and Z 5 strongly serrated and distinctly thick. All setae inserted on tubercles, but only the tubercles of setae Z 4 and Z 5 are large and distinctly visible; seta r 3 located at the margin of dorsal shield. Peritreme extending to the level of seta j 1; posterior margin of sternal shield and metasternal plates not visible due to weak sclerotisation; genital shield smooth; ventrianal shield longer than wide, with reticulations laterally and posteriorly to the anal opening, with four pairs of preanal setae ( JV 1, JV 2, JV 3, and ZV 2) and a pair of pores gv 3, located posterior to JV 2; JV 4 and ZV 3 absent; all ventral setae smooth. Calyx of the spermatheca with half next to vesicle tubular and the other half medially bulged, narrowing down at both extremes. Males with JV 1, JV 2, JV 3, and ZV 2, ventrianal shield subtriangular with reticulation on lateral margins; spermatodactyl C-shaped. Trochanter I 0 0 / 1 0 / 1 0 and genu II 2 2 / 0 2 / 0 1.

Female ( n = 1). Dorsum of idiosoma (Figs 4 A , 6 ). Dorsal shield reticulate, 284 long and 151 wide at the level of seta s 4 with the ornamentation between setae Z 4 and Z 5 characterised by each reticle including a series of parallel ridges perpendicular to the longest margin; four pairs of pores ( gd 2, gd 4, gd 6, and gd 9) visible; no lyrifissures visible. Lengths of setae: j 1 14, j 3 13, j 4 11, j 5 14, j 6 16, J 2 20, J 5 14, z 2 15, z 4 16, z 5 10, Z 1 21, Z 4 46, Z 5 58, s 4 18, s 6 22, S 5 23, and r 3 15. Seta r 3 located on the margin of dorsal shield. All setae inserted on tubercles, but only the tubercles of setae Z 4 and Z 5 large and distinctly visible. Setae s 6 and J 5 slightly serrated; setae Z 4 and Z 5 strongly serrated and distinctly thick.

Peritreme Extending to the level of j 1.

Venter (Fig. 4 B ). Sternal shield barely discernible; distance between st 1 - st 3 50, st 1 - st 1 48, st 2 - st 2 54, and between st 3 - st 3 58. Metasternal plates not visible. Genital shield smooth, with distance between st 5 - st 5 50. Ventrianal shield longer than wide, 95 long and 81 wide at the level of ZV 2; smooth anteriad JV 3, reticulate elsewhere; with four pairs of preanal setae ( JV 1, JV 2, JV 3, and ZV 2) and a pair of rounded pores gv 3, posteriad to JV 2; distance between gv 3 - gv 3 9. Unsclerotised cuticle next to the ventrianal shield with two pairs of setae ( ZV 1 and JV 5). One pair of metapodal plate. All ventral setae smooth.

Spermatheca (Fig. 4 C ). Calyx of the spermatheca 33 long with half next to vesicle tubular and the other half medially bulged, narrowing down at both extremes; atrium globular.

Chelicera movable digit 20 long, apparently with one tooth in addition to the apical tooth; fixed digit 22 long, apparently with one tooth in addition to the apical tooth.

Legs (Fig. 4 D ). In all legs, dorsal setae on genu, tibia and basitarsus inserted in distinct tubercles, while ventral setae arise directly from the cuticle. Chaetotaxy as follows: trochanter I 0 0 / 1 0 / 1 0, genu I 2 2 / 1 2 / 1 2, genu II 2 2 / 0 2 / 0 1, genu III 1 2 / 1 2 / 0 1, genu IV 1 2 / 1 2 // 0 1.

Male ( n = 2). Dorsum of idiosoma (Fig. 5 A ). Setal pattern and dorsal shield ornamentation as in the female, except for the absence of the characteristic ornamentation between setae Z 4 and Z 5 observed in the female, visible pore gd 8, and pore g d 9 not observed; 221–225 long and 128–146 wide at s 4 level; Four pairs of pores ( gd 2, gd 4, gd 6 and gd 8) visible. Lengths of setae: j 1 11–13, j 3 10, j 4 8–10, j 5 8, j 6 9–11, J 2 12, J 5 9–11, z 2 11–13, z 4 12–14, z 5 9–11, Z 1 13–15, Z 4 27, Z 5 39–41, s 4 11, s 6 14–16, S 5 11–13, r 3 11–13. Seta r 3 located at the margin of the dorsal shield. All setae inserted in tubercles, but only the tubercles of setae Z 4 and Z 5 are large and distinctly visible. Seta J 5 slightly serrated, setae Z 4 and Z 5 strongly serrated and distinctly thick.

Peritreme extending to level of j 3.

Venter (Fig. 5 B ). All ventral setae smooth. sternogenital shield smooth; ventrianal shield subtriangular with light lateral reticulation and with one pair of lyrifissures next to the anterior margin; 80–86 long and 121–123 wide at level of anterior corners, with four pairs of preanal setae ( JV 1, JV 2, JV 3, and ZV 2). One distinct pair of pores ( gv 3) posterior to JV 2.

Chelicera fixed digit 18–20 long with two teeth between pilus dentilis and distal tooth, movable digit 16–18 long with one subapical tooth in addition to apical tooth.

Spermatodactyl (Fig. 5 C ). c-shaped, with distal end facing back- and downward, shaft 8–10, foot 6–8.

Legs as in females.

Differential diagnosis.

Galendromimus ( Galendromimus) striatusornatus sp. nov. is assigned to the alveolaris species group. Females of the new species differ from those of other species by having many striae present in the posterior region of the dorsal shield, between setae Z 4 and Z 5 (Fig. 6 ), which were not mentioned or illustrated in the description of any another species of this group. Females of the species in this group differ from the new species as subsequently mentioned. Galendromimus ( G.) paulista , seta J 2 absent (present in the new species). Galendromimus ( G.) alveolaris , peritreme extending to the level of seta s 4; spermathecal calyx bulbous near atrium; seta S 5 13 µm long and acicular. Galendromimus ( G.) multipoculi with calyx tubular; ventrianal shield narrower than maximum width of genital shield; setae z 4, Z 1, s 4, and s 6 ~ 2.1, 1.8, 1.7, and 1.5 × longer than in the new species. Galendromimus ( G.) primulaporis sp. nov., with the peritreme extending only to the level of seta z 2; shorter setae Z 4 (25 µm) and S 5 (14 µm). Finally, G. ( G.) tunapunensis differs by having serrated setae z 2, z 4, Z 1, and s 4; notably longer setae Z 1, Z 4, s 4, and s 6 — being 3, 1.5, 2, and 2 × longer, than in the new species.

Etymology.

The specific name striatusornatus is derived from the Latin striatus (striated, grooved) and ornatus (ornamented, decorated), in reference to the ornamentation of the dorsal shield between setae Z 4 and Z 5, in which each reticle includes a series of parallel ridges perpendicular to the longest margin (Fig. 6 ).

Figures

Figure 4. Galendromimus (Galendromimus) striatusornatus sp. nov., female. A. Dorsal idiosoma; B. Ventral idiosoma; C. Spermatheca; D. Genu, tibia and basitarsus of the leg IV.

Figure 5. Galendromimus (Galendromimus) striatusornatus sp. nov., male. A. Dorsal idiosoma; B. Ventrianal shield; C. Spermatodactyl.

Figure 6. Galendromimus (Galendromimus) striatusornatus sp. nov. A – D. Ornamentation pattern in the central region of the female dorsal shield, between setae Z 4 and Z 5.