Torrenticola hoosieri Fisher & Dowling

Fisher, J. Ray, Fisher, Danielle M., Skvarla, Michael J., Nelson, Whitney A. & Dowling, Ashley P. G., 2017, Revision of torrent mites (Parasitengona, Torrenticolidae, Torrenticola) of the United States and Canada: 90 descriptions, molecular phylogenetics, and a key to species, ZooKeys 701, pp. 1-496 : 1

Torrenticola hoosieri Fisher & Dowling sp. n.

Material examined.

HOLOTYPE (♀): from USA, Indiana, Wayne County, south of I-70 (39°51'13"N, 85°8'4"W), 31 Jul 2014, by MJ Skvarla, MS 14-0731-001.

PARATYPES (1 ♀; 5 ♂): Indiana: 1 ♂ (ALLOTYPE) from Wayne County, south of I-70 (39°51'13"N, 85°8'4"W), 31 Jul 2014, by MJ Skvarla, MS 14-0731-001 • 1 ♀ and 4 ♂ from Wayne County, south of I-70 (39°51'13"N, 85°8'4"W), 31 Jul 2014, by MJ Skvarla, MS 14-0731-001.

Type deposition.

Holotype (♀), allotype (♂), and some paratypes (3 ♂) deposited in the CNC; other paratypes (1 ♀; 2 ♂) deposited in the ACUA.

Diagnosis.

Torrenticola hoosieri are similar to other members of the Tricolor Complex ( T. bittikoferae , T. larvata , T. pearsoni , T. olliei , T. sierrensis , T. tricolor , T. trimaculata , and T. unimaculata , T. cardia , T. kringi , T. dimorpha , and T. mohawk ) in having a short, conical rostrum. T. hoosieri can be differentiated from all other Tricolor Complex, and nearly all other Torrenticola , by lacking pedipalp ventral extensions on femora and genua. Additionally, T. hoosieri can be differentiated from all other Tricolor Complex by having more elongate pedipalp tibiae (3.67-4.33 in T. hoosieri , 2.65-3.55 in others) and by being colorless (rarely with diffuse pink dorsal coloration), except T. bittikoferae , T. pearsoni , and T. dimorpha .

Description.

Female (Figure 94) (n = 2) (holotype measurements in parentheses when available) with characters of the genus with following specifications.

Dorsum - (650-700 (650) long; 450-470 (450) wide) ellipsoid and colorless, occasionally with pink coloration without a distinct pattern. Anterio-medial platelets (115-125 (115) long; 55-60 (55) wide). Anterio-lateral platelets (177.5-180 (177.5) long; 67.5-67.5 (67.5) wide) free from dorsal plate. Dgl-4 much closer to the edge of the dorsum than to the muscle scars (distance between Dgl-4 345-375 (345)). Dorsal plate proportions: dorsum length/width 1.44-1.49 (1.44); dorsal width/distance between Dgl-4 1.25-1.30 (1.30); anterio-medial platelet length/width 2.08-2.09 (2.09); anterio-lateral platelet length/width 2.63-2.67 (2.63); anterio-lateral/anterio-medial length 1.44-1.54 (1.54).

Gnathosoma - Subcapitulum (277.5-300 (277.5) long (ventral); 202.5-221.23 (202.5) long (dorsal); 127.5-138.75 (127.5) tall) colorless. Rostrum (120-132.5 (120) long; 52.5-55 (52.5) wide) short and conical. Chelicerae (260-291 (260) long) with curved fangs (75-77 (75) long). Subcapitular proportions: ventral length/height 2.16-2.18 (2.18); rostrum length/width 2.29-2.41 (2.29). Pedipalps without extensions on femora and genua. Palpomeres: trochanter (50-55 (50) long); femur (130-137.5 (130) long); genu (72.5-80 (72.5) long); tibia (102.5-110 (102.5) long; 27.5-30 (27.5) wide); tarsus (25-27.5 (27.5) long). Palpomere proportions: femur/genu 1.72-1.79 (1.79); tibia/femur 0.79-0.80 (0.79); tibia length/width 3.67-3.73 (3.73).

Venter - (790-800 (800) long; 480-551 (480) wide) colorless. Gnathosomal bay (122.5-130 (130) long; 85-105 (85) wide). Cxgl-4 subapical. Medial suture (30-30 (30) long). Genital plates (182.5-188.75 (188.75) long; 150-152.5 (150) wide). Additional measurements: Cx-1 (257-260 (260) long (total); 120-129 (120) long (medial)); Cx-3 (330-390 (330) wide); anterior venter (162.5-167.5 (162.5) long). Ventral proportions: gnathosomal bay length/width 1.17-1.53 (1.53); anterior venter/genital field length 0.86-0.92 (0.86); anterior venter length/genital field width 1.08-1.10 (1.08); anterior venter/medial suture 5.42-5.58 (5.42).

Male (Figure 95) (n = 5) (allotypic measurements in parentheses when available) with characters of the genus with following specifications.

Dorsum - (580-640 (640) long; 390-410 (400) wide) ellipsoid and colorless. Anterio-medial platelets (110-117.5 (115) long; 55-60 (60) wide). Anterio-lateral platelets (167.5-175 (175) long; 65-72.5 (70) wide) free from dorsal plate. Dgl-4 much closer to the edge of the dorsum than to the muscle scars (distance between Dgl-4 320-360 (325)). Dorsal plate proportions: dorsum length/width 1.43-1.60 (1.60); dorsal width/distance between Dgl-4 1.14-1.23 (1.23); anterio-medial platelet length/width 1.91-2.05 (1.92); anterio-lateral platelet length/width 2.31-2.58 (2.50); anterio-lateral/anterio-medial length 1.43-1.59 (1.52).

Gnathosoma - Subcapitulum (245-280 (280) long (ventral); 185-202.5 (200) long (dorsal); 107.5-120 (120) tall) colorless. Rostrum (107.5-110 (110) long; 42.5-45 (45) wide). Chelicerae (245-260 (260) long) with curved fangs (65-70 (67.5) long). Subcapitular proportions: ventral length/height 2.23-2.36 (2.33); rostrum length/width 2.44-2.59 (2.44). Pedipalps without extensions on femora and genua. Palpomeres: trochanter (37.5-47.5 (45) long); femur (117.5-125 (125) long); genu (70-75 (75) long); tibia (97.5-100 (100) long; 22.5-25 (25) wide); tarsus (22.5-27.5 (27.5) long). Palpomere proportions: femur/genu 1.67-1.73 (1.67); tibia/femur 0.79-0.83 (0.80); tibia length/width 3.90-4.33 (4.00).

Venter - (670-740 (740) long; 450-495 (460) wide) colorless. Gnathosomal bay (120-130 (125) long; 80-85 (85) wide). Cxgl-4 subapical. Medial suture (102.5-122.5 (117.5) long). Genital plates (140-150 (147.5) long; 102.5-110 (105) wide). Additional measurements: Cx-1 (240-260 (260) long (total); 120-150 (130) long (medial)); Cx-3 (330-350 (345) wide); anterior venter (237.5-270 (270) long). Ventral proportions: gnathosomal bay length/width 1.47-1.59 (1.47); anterior venter/genital field length 1.70-1.84 (1.83); anterior venter length/genital field width 2.21-2.57 (2.57); anterior venter/medial suture 2.14-2.51 (2.30).

Immatures unknown.

Etymology.

Specific epithet ( hoosieri ) refers to Hoosier, the English demonym for a person from Indiana, the type locality.

Distribution.

Known only from Wayne County, Indiana (Figure 93).

Remarks.

Torrenticola hoosieri group with other members of the Tricolor Complex with high support and all specimens are less than 1% different in COI sequence from each other. In the combined analysis, T. hoosieri groups with other members of the Tricolor Complex from eastern North America that are not colorful, T. projector and T. pearsoni , and are greater than 4% different in COI from these species. This species is placed in the Tricolor Identification Group.

This species hypothesis is supported by low COI divergence within the species (0-2%), high divergence between species (3-15%), and the morphological characters outlined in the diagnosis.