Listropsoralges brevisetosus, Grootaert, Patrick, 2013

Grootaert, Patrick, 2013, Revision of the family Listropsoralgidae Fain, 1965 (Acariformes: Sarcoptoidea) - skin parasites of marsupials and rodents 3611, Zootaxa 3611 (1), pp. 1-69 : 39-42

Listropsoralges brevisetosus sp. n.

( Figs. 30–32 )

FEMALE (holotype). Body 205 long (200–205 in 2 paratypes) and 140 wide (140–145). Gnathosoma . Ventral retrorse spurs of subcapitulum with 2 apices. Dorsum. Dorsal shields covered by regularly spaced small unsclerotized lacunae. Propodonotal shield 68 long (65–68). Setae si and se subequal in length, very short. Hysteronotal shield 120 (120–130) long. Setal alveoli c1 absent. Setae e1 represented by short setae. Posterior margin of opisthosoma without median projection. Venter. Epigynum about 45 wide. Setae 1a and 3a filiform, not thickened. Setae 4b and 4a subequal. Setae 4a located far anterior to level of seta g bases. Opisthogastric shield 60 long and 42 wide. Setae h3 not thickened subequal to ps2 and ps3. Legs. Genua I and II with distinct ventroantiaxial projection each. Genua III without ventro-paraxial membrane but with distinct fold at its place. Setae d I 1.3 times longer than solenidion ω 3 I. Legs III about 75 long. Pretarsi III well developed. Legs IV moderately developed, about 50 long. Pretarsi IV moderately developed. All dorsal idiosomal setae and most idiosomal setae short—all 3–5. Lengths of setae: h2 100 (95–110), 1a 25 (25–28), 3a 17 (15–18), ω 1 I and ω 1 II about 20, ω 3 I about 23, φI and II about 35, φIII about 30, φIV 5, σ 1 I and III about 7.

Type material examined. Female holotype and 2 female paratypes ( UMMZ BMOC 06-0926 - 003 , # 1-3 ) from

Marmosa murina ( MUSM 33432), PERU: Loreto, Maynas, San Juan Bautista, San Gerardo km 18.5 carretera

Iquitos-Nauta, 120m, 03°54'24"S, 73°22'02"W, 14 September 2004, coll. W. Sanchez ( WSL #559). Holotype deposition. Holotype is deposited in UMMZ .

Non-type material examined. One female ( UMMZ BMOC 06-0926 - 004 ) from Marmosops noctivagus ( MUSM 33455 ) , PERU: Loreto, Maynas, San Juan Bautista, El Milagro km 21 carretera Iquitos-Nauta , 2.25 km SE del Camino , 120m, 03°56'40"S, 73°22'19"W, 5 September 2004, coll. W. Sanchez ( WSL #547 ) .

Etymology. This species name is an adjective derived from the Latin words, brevis (short) and setosus (bristly) referring to the short dorsal setae of idiosoma of females in this new species.

Differential diagnosis. This species differs from all other species of the genus by the short setae se being subequal to si. Females of this species are closest to those of Listropsoralges faini . In both these species, dorsal shields are uniformly ornamented. These species differ by the following characters. In Listropsoralges brevisetosus sp. n., the propodonotal shield is ornamented by small unsclerotized lacunae, setae cp are short, subequal in length to other dorsal hysteronotal setae, excluding h2, setae h3 and ps1, ps2 are subequal, solenidion σI and II are subequal. In Listropsoralges faini , the propodonotal shield is ornamented by dots, setae cp are approximately 4 times longer than other dorsal hysteronotal setae, excluding setae h2, setae h3 are 1.5 times longer than ps1 and ps2, solenidion σI is 4 times longer than σII.

Host range and distribution. This species is known from hosts of the genera Marmosa , M. murina from Peru (Loreto) and Marmosops , M. nuctivagus from the same place (present paper).

Figures

FIGURE 30. Listropsoralges brevisetosus sp. n., female in dorsal view.

FIGURE 31. Listropsoralges brevisetosus sp. n., female in ventral view.

FIGURE 32. Listropsoralges brevisetosus sp. n., female legs in ventral view: A and B—legs I and II, respectively, C—tibia and tarsus III, D—IV.