Torrenticola olliei 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 olliei Fisher & Dowling sp. n.

Material examined.

HOLOTYPE (♀): from USA, Oregon, Douglas County, Umpqua National Forest, Umpqua River (43°17'28"N, 122°37'12"W), 12 Aug 2013, by JC O’Neill, & WA Nelson, JNOW 13-0812-006.

PARATYPES (9 ♀; 12 ♂): British Columbia, Canada: 1 ♀ and 1 ♂ from Vancouver Island, Malahat, Goldstream Provincial Park, Goldstream River, 26 Jun 1979, by IM Smith, IMS790028A • California, USA: 1 ♀ and 1 ♂ from Humboldt County, Honeydew, Mattole River, beside road to Bull Creek on east side of bridge, 8 Aug 1987, by IM Smith, IMS870135A • 1 ♀ and 1 ♂ from Trinity County, Trinity River, beside Route 299, 8.7 kilometers northwest of Del Loma, 9 Aug 1987, by IM Smith, IMS870137A • 1 ♀ from Trinity County, Weaver Creek, beside Route 299, 4.3 kilometers north of Route 3 West, 9 Aug 1987, by IM Smith, IMS870138A & IMS870138B • Oregon, USA: 1 ♂ from Coos County, Siskiyou National Forest, Road 33 between Powers & Agness, Daphne Grove campground, Coquille River, 2 Jul 1983, by IM Smith, IMS830016 • 3 ♀ and 6 ♂ from Curry County, Port Orford, Butler Bar campground, Elk River, 25-26 Jun 1976, by IM Smith, IMS760163 • 1 ♀ from Curry County, Port Orford, small spring run beside road from Humbug Mountain State Park to McGribble campground, 25 Jun 1976, by IM Smith, IMS760161 • 1 ♂ (ALLOTYPE) from Douglas County, Umpqua National Forest, Umpqua River (43°17'28"N, 122°37'12"W), 12 Aug 2013, by JC O’Neill, & WA Nelson, JNOW 13-0812-006 • 1 ♀ and 1 ♂ from Douglas County, Umpqua National Forest, Umpqua River (43°17'28"N, 122°37'12"W), 12 Aug 2013, by JC O’Neill, & WA Nelson, JNOW 13-0812-006.

Type deposition.

Holotype (♀), allotype (♂), and most paratypes (5 ♀; 6 ♂) deposited in the CNC; other paratypes (4 ♀; 5 ♂) deposited in the ACUA.

Diagnosis.

Torrenticola olliei are similar to other members of the Tricolor Complex ( T. bittikoferae , T. hoosieri , T. larvata , T. pearsoni , T. sierrensis , T. tricolor , T. trimaculata , T. unimaculata , T. cardia , T. kringi , T. dimorpha , and T. mohawk ) in having a short, conical rostrum. T. olliei can be differentiated from most Torrenticola , including most other members of the Tricolor Complex, by having a very short rostrum (length/width = 1.56-1.81 in T. olliei , 1.80-3.13 in others), except T. bittikoferae (1.81-1.9) and T. dimorpha (1.3-1.6). Additionally, males have a shorter anterior venter than all other Tricolor Complex (♂ = 205-225 in T. olliei , 230-335 in others), except T. kringi (220-255), and both males and females have a wider genital field than most other Tricolor Complex (♀ = 190-202.5 in T. olliei , 145-180 in others; ♂ = 130-137.5 in T. olliei , 92.5-120 in others) except for T. sierrensis (♀ = 180-212.5; ♂ = 135-175) and female T. leviathan (180-195). Finally, T. olliei can be differentiated from most Tricolor Complex, except for T. sierrensis , by being distributed in the west (all others are eastern).

Description.

Female (Figure 176) (n=5) (holotype measurements in parentheses when available) with characters of the genus with following specifications.

Dorsum - (690-900 (690) long; 500-670 (500) wide) ovoid with orange coloration separated into posterior and anterior portions with faint orange medially. Anterio-medial platelets (130-172.5 (130) long; 60-80 (60) wide). Anterio-lateral platelets (190-235 (190) long; 70-92.5 (70) wide) free from dorsal plate. Dgl-4 much closer to the edge of the dorsum than to the muscle scars (distance between Dgl-4 360-470 (360)). Dorsal plate proportions: dorsum length/width 1.34-1.42 (1.38); dorsal width/distance between Dgl-4 1.31-1.43 (1.39); anterio-medial platelet length/width 1.95-2.23 (2.17); anterio-lateral platelet length/width 2.34-2.71 (2.71); anterio-lateral/anterio-medial length 1.36-1.46 (1.46).

Gnathosoma - Subcapitulum (245-287.5 (245) long (ventral); 155-225 (155) long (dorsal); 137.5-152.5 (137.5) tall) colorless and tall. Rostrum (85-112.5 (85) long; 50-67.5 (50) wide) short and conical. Chelicerae (225-305 (225) long) with curved fangs (55-65 (55) long). Subcapitular proportions: ventral length/height 1.78-1.92 (1.78); rostrum length/width 1.62-1.76 (1.70). Pedipalps with tuberculate ventral extensions on femora and genua. Palpomeres: trochanter (37.5-50 long); femur (87.5-122.5 (87.55) long); genu (58.75-82.5 (60) long); tibia (75-102.5 (75) long; 25-33.75 (25) wide); tarsus (25-30 (26.25) long). Palpomere proportions: femur/genu 1.46-1.51 (1.46); tibia/femur 0.84-0.90 (0.86); tibia length/width 3.00-3.08 (3.00).

Venter - (790-1050 (810) long; 550-765 (550) wide) colorless. Gnathosomal bay (120-170 (150) long; 75-97.5 (75) wide). Cxgl-4 subapical. Medial suture (12.5-50 (12.5) long). Genital plates (202.5-230 (212.5) long; 190-202.5 (190) wide). Additional measurements: Cx-1 (260-375 (280) long (total); 130-195 (130) long (medial)); Cx-3 (350-465 (350) wide); anterior venter (162.5-255 (162.5) long). Ventral proportions: gnathosomal bay length/width 1.37-2.00 (2.00); anterior venter/genital field length 0.76-1.11 (0.76); anterior venter length/genital field width 0.85-1.28 (0.86); anterior venter/medial suture 5.10-13.00 (13.00).

Male (Figure 177) (n = 5) (allotypic measurements in parentheses when available) with characters of the genus with following specifications.

Dorsum - (560-640 (570) long; 410-460 (410) wide) ovoid with orange coloration separated into posterior and anterior portions with faint orange medially. Anterio-medial platelets (102.5-125 (107.5) long; 50-70 (56.25) wide). Anterio-lateral platelets (170-187.5 (170) long; 62.5-80 (62.5) wide) free from dorsal plate. Dgl-4 much closer to the edge of the dorsum than to the muscle scars (distance between Dgl-4 320-375 (320)). Dorsal plate proportions: dorsum length/width 1.33-1.44 (1.39); dorsal width/distance between Dgl-4 1.19-1.33 (1.28); anterio-medial platelet length/width 1.71-2.25 (1.91); anterio-lateral platelet length/width 2.34-2.72 (2.72); anterio-lateral/anterio-medial length 1.50-1.68 (1.58).

Gnathosoma - Subcapitulum (197.5-220 (212.5) long (ventral); 147.5-160 (159) long (dorsal); 115-125 (115) tall) colorless and tall. Rostrum (70-82.5 (72.5) long; 40-50 (40) wide) short and conical. Chelicerae (195-220 long) with curved fangs (47.5-52.5 long). Subcapitular proportions: ventral length/height 1.65-1.85 (1.85); rostrum length/width 1.56-1.81 (1.81). Pedipalps with tuberculate ventral extensions on femora and genua. Palpomeres: trochanter (32.5-35 (32.5) long); femur (75-77.5 (76.25) long); genu (52.5-55 (52.5) long); tibia (67.5-75 (67.5) long; 22.5-25 (22.5) wide); tarsus (20-25 (20) long). Palpomere proportions: femur/genu 1.41-1.48 (1.45); tibia/femur 0.89-0.97 (0.89); tibia length/width 2.70-3.00 (3.00).

Venter - (650-710 (650) long; 444-530 (444) wide) colorless. Gnathosomal bay (122.5-137.5 (127.5) long; 62.5-75 (62.5) wide). Cxgl-4 subapical. Medial suture (70-80 (75) long). Genital plates (165-172.5 (165) long; 130-137.5 (130) wide). Additional measurements: Cx-1 (234-270 (235) long (total); 102-135 (102) long (medial)); Cx-3 (311-355 (312) wide); anterior venter (200-225 (207.5) long). Ventral proportions: gnathosomal bay length/width 1.70-2.04 (2.04); anterior venter/genital field length 1.19-1.30 (1.26); anterior venter length/genital field width 1.54-1.67 (1.60); anterior venter/medial suture 2.67-2.93 (2.77).

Immatures unknown.

Etymology.

Specific epithet ( olliei ) named in honor of Ollie-pet Boston Terrier of JRF and DMF-whose brachycephaly resembles the short rostrum of this species, the shortest of all Torrenticola .

Distribution.

Pacific coastal mountains (Figure 175).

Remarks.

Torrenticola olliei groups with other members of the Tricolor Complex with high support in all analyses and group with T. sierrensis to form the western portion of this complex. Only one specimen was analyzed phylogenetically, so intraspecific variation remains unknown, but that specimen is greater than 6% different from all specimens of T. sierrensis . This species hypothesis is supported by high divergence between species (3-15%), and by the morphological characters outlined in the diagnosis.