Petrobia (Tetranychina) cardi Chaudhri, W. M. 1972
Creators: name: Kamran, Muhammad
name: Alatawi, Fahad Jaber
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Tetranychidae
Petrobia
Petrobia cardi

description: Petrobia (Tetranychina) cardi Chaudhri, W. M., 1972
Materials
Type status: Other material. Occurrence: catalogNumber: KSMAAS- 23 - Tet-Pet- 01 - Species record; recordedBy: M. Kamran; individualCount: 1; sex: Female; lifeStage: adult; occurrenceID: B47E3CCE-28BE-57E4-B979-A83473BC0A25; Taxon: scientificName: Petrobia cardi; nameAccordingTo: Chaudhri, W., 1972. Mites of the genus Petrobia. I. Description of three new species of mites from Pakistan (Tetranychidae); kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Prostigmata; family: Tetranychidae; genus: Petrobia; subgenus: Tetranychina; Location: country: Pakistan; stateProvince: Kashmir; verbatimCoordinates: 34°34.030'N 73°53.478'E; decimalLatitude: 34.56717; decimalLongitude: 73.8913; georeferenceProtocol: GPS; Identification: identifiedBy: Muhammad Kamran; dateIdentified: 2023; Event: samplingProtocol: shaking plant foliage; eventDate: 18 / 7 / 2023; habitat: wild grasses; Record Level: language: en; collectionCode: Mites; basisOfRecord: Slide Mounted Specimen
Type status: Other material. Occurrence: catalogNumber: KSMAAS- 23 - Tet-Pet- 02 - Species record; recordedBy: M. Kamran; individualCount: 1; sex: Female; lifeStage: adult; occurrenceID: B9BE40B9-ADF8-5D3C-9F27-3E08117BA076; Taxon: scientificName: Petrobia cardi; nameAccordingTo: Chaudhri, W., 1972. Mites of the genus Petrobia. I. Description of three new species of mites from Pakistan (Tetranychidae); kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Prostigmata; family: Tetranychidae; genus: Petrobia; subgenus: Tetranychina; Location: country: Pakistan; stateProvince: Kashmir; verbatimCoordinates: 34°34.030'N 73°53.478'E; decimalLatitude: 34.56717; decimalLongitude: 73.8913; georeferenceProtocol: GPS; Identification: identifiedBy: Muhammad Kamran; dateIdentified: 2023; Event: samplingProtocol: shaking plant foliage; eventDate: 18 / 7 / 2023; habitat: wild grasses; Record Level: language: en; collectionCode: Mites; basisOfRecord: Slide Mounted Specimen
Type status: Other material. Occurrence: catalogNumber: KSMAAS- 23 - Tet-Pet- 03 - Species record; recordedBy: M. Kamran; individualCount: 1; sex: Male; lifeStage: adult; occurrenceID: 74034B49-36C1-5800-A65B-C2F672E60511; Taxon: scientificName: Petrobia cardi; nameAccordingTo: Chaudhri, W., 1972. Mites of the genus Petrobia. I. Description of three new species of mites from Pakistan (Tetranychidae); kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Prostigmata; family: Tetranychidae; genus: Petrobia; subgenus: Tetranychina; Location: country: Pakistan; stateProvince: Kashmir; verbatimCoordinates: 34°34.030'N 73°53.478'E; decimalLatitude: 34.56717; decimalLongitude: 73.8913; georeferenceProtocol: GPS; Identification: identifiedBy: Muhammad Kamran; dateIdentified: 2023; Event: samplingProtocol: shaking plant foliage; eventDate: 18 / 7 / 2023; habitat: wild grasses; Record Level: language: en; collectionCode: Mites; basisOfRecord: Slide Mounted Specimen
Type status: Other material. Occurrence: catalogNumber: KSMAAS- 23 - Tet-Pet- 04 - Species record; recordedBy: M. Kamran; individualCount: 1; sex: Female; lifeStage: adult; occurrenceID: 7657BEF8-5E9F-5D79-9B43-4E2C47188171; Taxon: scientificName: Petrobia cardi; nameAccordingTo: Chaudhri, W., 1972. Mites of the genus Petrobia. I. Description of three new species of mites from Pakistan (Tetranychidae); kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Prostigmata; family: Tetranychidae; genus: Petrobia; subgenus: Tetranychina; Location: country: Pakistan; stateProvince: Kashmir; verbatimCoordinates: 34°37.910'N 73°55.146'E; decimalLatitude: 34.63183; decimalLongitude: 73.91911; georeferenceProtocol: GPS; Identification: identifiedBy: Muhammad Kamran; dateIdentified: 2023; Event: samplingProtocol: shaking plant foliage; eventDate: 18 / 7 / 2023; habitat: wild grasses; Record Level: language: en; collectionCode: Mites; basisOfRecord: Slide Mounted Specimen
Type status: Other material. Occurrence: catalogNumber: KSMAAS- 23 - Tet-Pet- 05 - Species record; recordedBy: M. Kamran; individualCount: 1; sex: Female; lifeStage: adult; occurrenceID: 99EA115D-E88E-5B62-A1D7-55D10CEDD3DD; Taxon: scientificName: Petrobia cardi; nameAccordingTo: Chaudhri, W., 1972. Mites of the genus Petrobia. I. Description of three new species of mites from Pakistan (Tetranychidae); kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Prostigmata; family: Tetranychidae; genus: Petrobia; subgenus: Tetranychina; Location: country: Pakistan; stateProvince: Kashmir; verbatimCoordinates: 34°37.910'N 73°55.146'E; decimalLatitude: 34.63183; decimalLongitude: 73.91911; georeferenceProtocol: GPS; Identification: identifiedBy: Muhammad Kamran; dateIdentified: 2023; Event: samplingProtocol: shaking plant foliage; eventDate: 18 / 7 / 2023; habitat: wild grasses; Record Level: language: en; collectionCode: Mites; basisOfRecord: Slide Mounted Specimen
Description
Female (n = 4) Body broadly oval, Length including gnathosoma 700 (690‒715); idiosoma (v 2 - h 1) 583 (575‒590) long, c 3 - c 3 507 (500‒515) wide; length of legs (from trochanter to distal end of tarsus): leg I 1298 (1275‒1305); leg II 570 (565‒578); leg III 664 (655‒670), leg IV 1040 (1033‒1050); leg I / v 2 - h 1: 2.22 (2.20–2.24).
Dorsum (Fig. 5). Propodosomal shield well defined, densely punctate, two pairs of eyes; lateral propodosoma with longitudinal to oblique granulated striations, setae sc 1 on prodorsal shield; opisthosomal striae transverse medially between setae c 1 - h 1, except sub-medially changing to inverted v-shaped striation pattern just posterior to setae d 1, laterally with longitudinal to oblique irregular striations, dorsal striae lobed and closely-spaced. All dorsal setae long robust, serrated and set on strong tubercles, tubercles of setae c 1, d 1 and e 1 well apart, while of setae f 1 contiguous; lengths of dorsal setae (without tubercles): v 2 95 (90‒98), sc 1 139 (130‒144), sc 2 88 (83‒90), c 1 183 (176‒185), c 2 164 (158‒169), c 3 82 (78‒88), d 1 188 (180‒193), d 2 172 (167‒179), e 1 183 (176‒188), e 2 175 (168‒177), f 1 180 (181‒190), f 2 131 (126‒138), h 1 90 (90‒97). Distances between dorsal setae v 2 - h 1 583 (575‒590), v 2 - v 2 82 (76‒85), sc 1 - sc 1 118 (115‒122), sc 2 - sc 2 355 (345‒360), c 1 - c 1 82 (80‒89), c 1 - c 2 66 (66‒69), d 1 - d 1 65 (60–68), d 1 - d 2 98 (94‒99), e 1 - e 1 114 (110–116), e 1 - e 2 28 (27‒30), f 1 - f 1 45 (42‒47), f 2 - f 2 155 (150‒158), h 1 - h 1 98 (90–98), c 1 - d 1 75 (73‒78), d 1 - e 1 98 (93‒99), e 1 - f 1 85 (82‒86), f 1 - f 2 106 (102‒109), f 1 - h 1 124 (120‒126).
Venter (Fig. 6). Integument between setae 1 a – 3 a with transverse dotted striae, between 3 a to 4 a with longitudinal striae, anterior of genito-anal area with longitudinal striae. Striae on venter lobed. Lengths of setae: 1 a 49 (45‒49), 1 b 65 (55–65), 1 c 48 (44‒48), 2 b 26 (25‒27), 2 c 28 (24‒28), 3 a 37 (35‒38), 4 a 36 (35‒38), 3 b 20 (19‒20), 4 b 20 (19‒20), one pair of aggenital setae (ag) 34 (32‒34), two pairs of genital setae, g 1 26 (26‒27), g 2 26 (25‒27) and three pairs of anal setae (ps 1‒3), ps 1 20 (20‒21), ps 2 19 (18‒19), ps 3 21 (18‒21), h 2 26 (24‒26), h 3 25 (23‒25). Spermatheca elongated thread-like.
Gnathosoma Stylophore (Fig. 5 b) anteriorly rounded, peritremes distally slightly anastomosed forming heart-shaped globular structure, 24 long, 12 wide; ventral infracapitulum with one pair of adoral setae or 10 (9‒10) and one pair of subcapitular setae m 31 (29‒31). Palp five-segmented (Fig. 8), palptarsus with one solenidion ω 6 (5‒8), three eupathia ul' ' ζ 8 (7‒9), ul' ζ 7 (6‒8), sul 9 (7‒9) and three setiform setae a 10 (9‒11), b 12 (11‒13), c 13 (10‒13); palp tibia with three setae d 28 (27‒30), l' 18 (15‒19), l' ' 18 (17‒20) and one claw bifid distally, palp genu with one simple seta l' ' 27 (25‒28) and palp femur with one serrated seta d 32 (29‒30) (similar to dorsal setae).
Legs (Fig. 7). Leg I (trochanter to distal end of tarsus) two times longer than the length of idiosoma. Length of leg I (trochanter to tip of tarsus) 1293 (1220‒1293), leg II 570 (560‒575), leg III 660 (520‒660, leg IV 1030 (981‒1032); length of leg segments, Leg I (trochanter 40‒45, femur 490‒513, genu 55‒60, tibia 470‒495, tarsus 165‒180; leg IV trochanter 50 (46‒50), femur 352 (340‒355), genu 72 (65‒75), tibia 400 (385‒400), tarsus 155 (145‒155). Leg segment setal formula as follows: coxae 2-2 - 1 - 1; trochanters 1-1 - 1 - 1; femora 9-7 - 5 - 5; genua 4-5 - 5 - 5; tibiae 24 + 1 φ- 11-11 - 11; tarsi 26 + 1 ω + 2 dup- 15 + 1 dup- 14 + 1 dup- 14 + 1 dup; solenidia on leg I Iω ” 50 (48‒50), IIω ” 53 (50‒53), IIIω’ 30 (29‒30), IV ω’ 31 (30‒31). Empodia I – IV with true claws pad-like, empodial claws bearing two rows of ventrally directed hairs.
Male (n = 1). Body oval elongate, much shorter than female, including gnathosoma (adoral setae to h 2) 376 long, excluding gnathosoma (v 2 - h 1) 251 long, c 3 - c 3 222 wide; length of legs (from trochanter to distal end of tarsus): leg I 1164; leg II 508; leg III 556, leg IV 820.
Dorsum (Fig. 9). Propodosomal shield well defined, densely punctate, two pairs of eyes; lateral propodosoma with longitudinal to oblique granulated (dotted) striations, setae sc 1 on prodorsal shield; opisthosomal striae transverse medially between setae c 1 - f 1, except sub-medially changing to longitudinal to oblique between setae f 1 - h 1, transverse posterior to h 1, laterally with longitudinal to oblique irregular striations, all dorsal striae closely-spaced and lobed. Dorsal setae sub spautulate, serrtaed, short, not reaching to the setae next in line and not set on strong tubercles; Lengths of dorsal setae (without tubercles): v 2 27, sc 1 39, sc 2 31, c 1 32, c 2 37, c 3 23, d 1 22, d 2 35, e 1 21, e 2 26, f 1 16, f 2 22, h 1 34. Distances between dorsal setae v 2 - h 1 251, v 2 - v 2 41, sc 1 - sc 1 75, c 1 - c 1 67, c 1 - c 2 54, d 1 - d 1 32, d 1 - d 2 48, e 1 - e 1 36, e 1 - e 2 28, f 1 - f 1 17, f 2 - f 2 69, f 1 - f 2 28, h 1 - h 1 24.
Venter (Fig. 10). Integument between setae 1 a- 3 a with transverse lobed striae, between 3 a to 4 a with irregular oblique striae. Lengths of setae: 1 a 27, 1 b 24, 1 c 23, 2 b 23, 2 c 21, 3 a 21, 3 b 20, 4 a 18, 4 b 19, one pair of aggenital setae (ag) 11, two pairs of genital setae, g 1 11, g 2 12 and three pairs of anal setae (ps 1‒3), ps 1 = ps 2 = ps 3 = 9–10, h 2 = h 3 11–12.
Gnathosoma. Ventral infracapitulum with one pair of adoral setae 8 and one pair of subcapitular setae m 16. Palp five-segmented (Fig. 12), palptarsus with one solenidion ω 7 (7‒8), three eupathia ul' ' ζ 8 (6‒8), ul' ζ 10 (9‒11), sul 9 (8‒10) and three setiform setae a 11 (9‒11), b 12 (12‒13), c 11 (10‒12); palp tibia with three setae d 19 (18‒22), l' 11 (11‒14), l' ' 13 (12‒15) and one claw bifid distally, palp genu with one simple seta l' ' 21 (19‒22) and palp femur with one serrated seta d 22 (20‒24) (similar to dorsal setae).
Legs (Fig. 11). Length of leg I (trochanter to tip of tarsus) 1164, leg II 508; leg III 556; leg IV 820; length of leg segments, Leg I (trochanter 32, femur 461, genu 47, tibia 455, tarsus 169; leg IV trochanter 40, femur 270, genu 53, tibia 335, tarsus 122. Leg segment setal formula as follows: coxae 2-2 - 1 - 1; trochanters 1-1 - 1 - 1; femora 9-7 - 5 - 5; genua 4-5 - 5 - 5; tibiae 30 + 13 φ + b (trichobothium-like seta) - 11-11 - 11; tarsi 20 + 5 ω + 3 dup- 14 + 1 ω + 1 dup- 13 + 1 dup- 13 + 1 dup; solenidia on leg I Iω ” 40, IIω ” 41, IIω ” 37, IIIω’ 15, IV ω’ 30, Empodia I – IV with true claws pad-like, empodial claws bearing two rows of ventrally directed hairs.
Aedeagus — Slightly directed ventrad, needle-like gradually tapering towards end.
Distribution
Abbottabad, Pakistan.
Remarks
The morphological characters of Petrobia (Tetranychina) cardi Chaudhri collected in the present study are almost similar to the original description (Chaudhri 1972) by leg chaetotaxy, shape of dorsal setae and peritremes, except some variations in the length of leg I 1220 ‒1293 vs. 1192 and leg IV 981‒1032 vs. 938 in the latter and length of dorsal setae.
description: Published as part of Kamran, Muhammad & Alatawi, Fahad Jaber, 2025, A new species of the genus Petrobia Murray (Prostigmata, Tetranychidae) and complementary description of Petrobia cardi Chaudhri, pp. e 141566 in Biodiversity Data Journal 13 on page e141566, DOI: 10.3897/BDJ.13.e141566