Transeius mariae-angeae Kreiter, 2013

Kreiter, S., Mailloux, J., Tixier, M. - S., Le Bellec, F., Douin, M., Guichou, S. & Etienne, J., 2013, New Phytoseiid Mites Of The French West Indies, With Description Of A New Species, And New Records (Acari: Mesostigmata), Acarologia 53 (3), pp. 285-303 : 286-289

Transeius mariae-angeae Kreiter n.sp.

Description

Adult Female ( Figs. 1-3 ) (n = 2)

Dorsum ( Fig. 1 ) — Dorsal shield 305 – 313 long and 205 – 215 wide, strongly reticulated on the whole dorsum, with 5 solenostomes (gd1, 2, 6, 8 and 9), 9 pairs of poroids, 17 pairs of dorsal setae and 2 pairs of sub-lateral setae: j1 20 – 23, j3 36 – 38, j4 15 – 18, j5 16 – 19, j6 15 – 18, J2 13 – 14, J5 8 – 9, z2 33 – 26, z4 29 – 33, z5 9, Z1 16 – 18, Z4 54 – 55, Z5 74 – 75, s4 58 – 60, S2 28 – 30, S4 14 – 15, S5 14 – 16, r3 23 – 25, R1 21. All setae smooth except Z4 and Z5 which are moderately serrated.

Peritreme ( Fig. 1 ) — Extending to the level of j1.

Venter ( Fig. 2 ) — Sternal shield smooth. Other shields smooth. Sternal shield not very large, with 3 pairs of setae and 2 pairs of pores; 1 pair (st4) out of the sternal shield, on a small metasternal shield; posterior margin straight. Distances between st1- st3 55, st2-st2 64 – 65, st5-st5 55 – 56. Two pairs of metapodal shields 15 long and 1 – 3 wide for the largest, 6 – 8 long and very thin for the smallest one. Ventrianal shield with 3 pairs of pre-anal setae, JV1, JV2 and ZV2 and one pair of large elliptical pre-anal solenostomes. Membrane surrounding ventrianal shield with 4 pairs of setae ZV1, ZV3, JV4 and JV5 and 4 pairs of poroids; ventrianal shield 90 – 98 long, 63 – 64 wide at level of anterior corners and 58 – 60 wide at level of anus. JV5 43 – 50 long and smooth. Legs — Macrosetae on all legs: SgeI 16 – 18, SgeII 18, SgeIII 15 – 18, StiIII 23 – 25, SgeIV 36 – 40, StiIV 19 – 23, StIV 38. All macrosetae whip-like. Chaetotactic formula of genu II: 2-2/0, 2/0-1; genu III: 1-2/1, 2/0-1. Length of legs I: 310 – 318, II: 223 – 238, III: 235 – 245, IV: 320 – 325.

Chelicera — Fixed digit 30 – 31 with 9 – 10 teeth and movable digit 33 – 34 with four teeth.

Spermatheca ( Fig. 3 ) — Calyx of spermatheca pocular ( Denmark et al. 1999) with the cervix elongate, 4 – 6 wide and 6 – 8 long, with a big atrium at the basis and a visible long ductus minor on the paratype female.

Adult Male: unknown.

Holotype — 1 female (on one preparation), La DØsirade, Parc Eolien, 16°11’N, 61°39’W, alt. 184 m, on Coccoloba pubescens, Kreiter coll., 5 January 2008, deposited in the Montpellier SupAgro Acarology Collection in UMR CBGP.

Paratype — 1 female (on a separate preparation), same location deposited in the same collection .

Etymology — the name of the species refers to the first name of the first author’s wife of this paper and describer of this new species, Marie-Ange Burgell, to whom this species is dedicated.

Diagnosis — the two specimens of Transeius mariae-angeae n. sp. found are close to Transeius bellotti (Moraes and Mesa) but differ in having: the shape of spermatheca very different (both pocular sensu denmark et al. (1999) but with an open cervix and with a small atrium at the basis of the cervix for T. bellotti and a more closed cervix, a strong large atrium and swollen edges of the cervix for T. mariaeangeae n. sp.); the presence of macrosetae on all legs and not only of leg IV; the setae length longer in the new species except Z4, S4, SgeIV and StIV; the dorsum smooth and not imbricate; the setae j3 and s4 not serrated and the number of teeth on movable/fixed digits = 9-10/4 (against 9/ 3 in T. bellotti ).

It resembles also to T. rufus ( Denmark and Evans) but differs in having: several setae much longer except for j1, Z4, SgeIV and StIV which are longer in T. rufus ; the dorsal shield not reticulated in the new species and slightly reticulated in T. rufus ; the number of teeth on movable/fixed digits of chelicerae = 9-10/4 against 7/0. It is also close to T. sanblasensis (De Leon) but setae are longer in the new species except for some (j1, z4, s4, r3, S2) which are very much longer and all macrosetae of the four legs are smaller in the new species. It resembles also to T. aciculus (De Leon) but differs in having j4 shorter (15-18 instead of 36) and S5 longer (14-16 instead of 9); and to T. cristobalensis (De Leon) but differs in having a shorter StIV (38 instead of 88).

Figures

FIGURE 1: Dorsal shield of the female of Transeius marieae-angeae n. sp. (from the holotype)

FIGURE 2: Ventral shields of the female of Transeius marieae-angeae n. sp. (from the holotype)

FIGURE 3: Calyx of spermatheca of the female of Transeius marieae-angeae n. sp. (from the holotype)