Klinckowstroemia stilla, Villegas-Guzmán, Gabriel A., Reyes-Castillo, Pedro & Pérez, Tila M., 2011

Villegas-Guzmán, Gabriel A., Reyes-Castillo, Pedro & Pérez, Tila M., 2011, New species of Klinckowstroemia Baker & Wharton, 1952 (Acari: Klinckowstroemiidae), associated with passalid beetles from Mexico and Panama, Zootaxa 2747, pp. 19-36 : 28-31

Klinckowstroemia stilla sp. nov.

Female (n = 5)

Body oval. Idiosoma, L = 563 (557–595); W = 397 (397–437) ( Fig. 5 A).

Gnathosoma with different types of setae hyp 1 long and simple, L = 31 (30–34). Seta hyp 2 simple, L = 19. Seta hyp 3 simple, L = 9 ( Fig. 6 A), and hyp 4 simple, L = 12 (8–12). Chelicera with excrescences, movable digit with five teeth, two small and three large; fixed digit with six teeth. Most palpal setae simple, but av 1 and av 2 of trochanter are branched and serrate respectively. On femur al 1 serrate. Anterior margin of trochanter palp with blunt process (b) and spine-like process (s).

Hyaline hood extending to level of coxa I, seta a 1 short and simple, L = 12 (7–12). Tritosternum base wider than long. Presternal L = 25 (22–25), anterior W = 78 (78–81), shagreened ( Fig. 6 D); anterior margin of the shield slightly concave medially, without presternal notch. Sternal seta st 1 micro seta ( Fig. 6 E), placed near to anterior margin, and lyriform sternal pore stp 1 near to posterior margin.

Sternal shield ( Fig. 6 C) L = 47 (37–56) shagreened, sternal seta st 2 microseta placed near to anterior margin, stp 2 below, almost in the centre of the shield. Sternal setae st 3 and st 4 microsetae, near posterior margin of shield.

Sternogynal shield L = 31 (31–34), W = 109 (109–124), triangular, posterior margin narrow and slightly pointed at apex. Surface shagreened; stp 3 located closer to anterior margin. Sternogynal apodeme with broad base that reaches to the shield, posterior arms thin, extending posteriorly to level of latigynal and mesogynal condyles.

Latigynal shields shagreened, L = 90 (84–90); W = 56, each with an oval pore and four simple setae, medial margin of shield pointed ( Fig. 6 B). Latigynal apodeme thick and separate from sternogynal shield. Mesogynal shield L = 81 (81–93), W = 62 (62–81), drop-shaped, extending anteriorly to sternogynal shield ( Fig. 6 B), posterior margin rounded and wider, surface shagreened. Mesogynal condyles extending almost to the middle of the shield.

Ventral shield, L = 171 (164–171); posterior W = 317 (317–341), shield triangular ( Fig. 6 G), truncated posteriorly, surface shagreened, with 12 pairs of small setae ( Fig. 6 H). Three pores underneath posterior margin of coxa IV ( Fig. 3 A). Metapodal-peritrematal-exopodal shield (MPES) shagreened, with one pair of pores and one simple seta ( Fig. 5 A).

Anal shield, L = 87 (87–93); anterior W = 217 (217–257), with 5 pairs of simple setae ( Fig. 6 H) plus longer antero-anal seta, L = 19 (12–19), two pairs of pores, one near anterior margin, and the other below the anus. Serrate setae of the leg I are: trochanter pv 1; femur pv 1, pv 2, and pv 3; genu I, al 1 and av 1; tibia av 1, and av 2 serrated. Serrate setae on leg II are: femur pv 1; genu av 1, and pv 1. Serrate setae leg III are: trochanter ad 1, and ad 2; femur av 1; genu pv 1. Serrated setae on leg IV are: trochanter pv 1; genu pv 1. Seta pv 1 of femur IV large, L = 36 (34–40) ( Fig. 6 F).

Male (n = 2)

Body oval, similar to female. Idiosoma, L = 531–544, W = 371–384 ( Fig. 5 B). Presternal shield, L = 31–34, anterior W = 56–62, shagreened, without presternal notch, anterior margin slightly concave ( Fig. 5 B). Sternal seta st 1 microseta is near the middle of the shield. Sternal setae st 2, st 3, and st 4 are microsetae. Sternal shield shagreened, L = 34–43. Genital opening oval, L = 37, W = 50–53. Ventral shield with 30 setae ( Fig. 5 B), L = 233, W = 295, shagreened but laterally reticulated, with 2–3 pores near to anterior margin of coxa IV. Anal shield, L = 93, W = 233, with four pairs of simple setae, plus longer antero-anal seta L = 12, with two pores: one near to anterior margin and the other below the anus. Hypostomal seta hyp 1 long and simple, L = 31–32, seta hyp 2 is simple and medium, L = 17–19, while seta hyp 3 is short and simple, L = 7–9. Seta pv 1 serrated on coxa IV, L = 33–34.

Diagnosis. The mesogynal shield extending deeply to the sternogynal shield, with its posterior margin wide and rounded; and all the sternal setae, on female and male, are microsetae.

Remarks. Klinckowstroemia stilla sp. nov. is similar to K. starri Rosario & Hunter and K. multisetillosa Rosario & Hunter , because they have the mesogynal shield extending deeply to the sternal shield, and the medial margins of latigynal shields pointed. K. stilla (L = 575, W = 409) is smaller than K. starri (L = 738, W = 541) and K. multisetillosa , (L = 936, W = 634); and sternal and sternogynal shields are reticulated in K. starri but shagreened in K. stilla and K. multisetillosa . Furthermore, K. stilla has all the sternal setae as microsetae, while K. starri has medium-size sternal setae, with st 1 serrated and the others simple. Klinckowstroemia multisetillosa has six pairs of anterior setae a and the lateral margins of mesogynal shield concave, but K. stilla only has one pair of setae a and the lateral margins of mesogynal shield straight.

Etymology. This name is from Latin stilla (= drop) referring to the shape of the mesogynal shield which is similar a drop of water.

Material examined. Proculus goryi : holotype Ƥ ( CNAC 006739), 4 Ƥ ( CNAC 006740-6743) and 2 33 ( CNAC 006744-6745) paratypes from Chiapas, Mexico, Ejido Benito Juárez, Reserva de la Biosfera Volcán Tacan (15 0 5. 966’ N, 92 0 8. 600’ W), 1,687 m., 19 May 2007, mountain rain forest, ex one beetle, E. Chame, P. Reyes- Castillo, and B. Gomez; one female was found on the prosternum, and others in the alcohol. Holotype female, 4 paratype females, and 2 paratype males deposited in the CNAC.

Ecology. The species K. stilla was collected on one specimen of Proculus goryi at one locality in Chiapas near the border with Guatemala. Another klinckowstroemiid species has been associated with the genus Proculus , namely Klinckowstroemia multisetillosa from Guatemala and Honduras on three different beetle species ( Padilla & Schuster 1994).

Figures

FIGURE 3. Klinckowstroemia melissae sp. nov. (A) Body female ventral view, scale = 200 µm. (B) Body male ventral view, scale = 200 µm.

FIGURE 5. Klinckowstroemia stilla sp. nov. (A) Body female ventral view, scale = 200 µm. (B) Body male ventral view, scale = 200 µm.

FIGURE 6. Klinckowstroemia stilla sp. nov. Female: (A) Gnathosoma. (B) Genital shield. C) Sterna shield. (D) Presternal and seta st 1. (E) Seta st 1. (F) Seta pv 1 on leg IV. (G) Ventral shield. (H) Anal shield.