Petrobia (Petrobia) pakistanensis Kamran & Alatawi 2025, sp. nov.
Creators: name: Kamran, Muhammad
name: Alatawi, Fahad Jaber
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Trombidiformes
Tetranychidae
Petrobia
Petrobia pakistanensis

description: Petrobia (Petrobia) pakistanensis Kamran & Alatawi sp. nov.
Materials
Type status: Holotype. Occurrence: catalogNumber: KSMAAS- 23 - Tet-Pet-H; recordedBy: M. Kamran; individualCount: 1; sex: Female; lifeStage: adult; occurrenceID: 8B0FBB5F-8941-5BA7-B297-3E300A8842F4; Taxon: scientificName: Petrobia pakistanensis; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Prostigmata; family: Tetranychidae; genus: Petrobia; subgenus: Petrobia; Location: country: Pakistan; stateProvince: Khyber Pakhtunkhwa; locality: Abbotabad; verbatimElevation: 1,256 m; verbatimCoordinates: 34°08.427'N 73°17.135'E; decimalLatitude: 34.14046; decimalLongitude: 73.28559; georeferenceProtocol: GPS; Identification: identifiedBy: Muhammad Kamran; dateIdentified: 2023; Event: samplingProtocol: shaking plant foliage; eventDate: 15 / 7 / 2023; habitat: wild grasses; Record Level: language: en; collectionCode: Mites; basisOfRecord: Slide Mounted Specimen
Type status: Paratype. Occurrence: catalogNumber: KSMAAS- 23 - Tet-Pet-P 1; recordedBy: M. Kamran; individualCount: 1; sex: Female; lifeStage: adult; occurrenceID: 4EDE717B-64C6-58D4-A4E1-883A75981821; Taxon: scientificName: Petrobia pakistanensis; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Prostigmata; family: Tetranychidae; genus: Petrobia; subgenus: Petrobia; Location: country: Pakistan; stateProvince: Khyber Pakhtunkhwa; locality: Abbotabad; verbatimElevation: 1,256 m; verbatimCoordinates: 34°08.427'N 73°17.135'E; decimalLatitude: 34.14046; decimalLongitude: 73.28559; georeferenceProtocol: GPS; Identification: identifiedBy: Muhammad Kamran; dateIdentified: 2023; Event: samplingProtocol: shaking plant foliage; eventDate: 15 / 7 / 2023; habitat: wild grasses; Record Level: language: en; collectionCode: Mites; basisOfRecord: Slide Mounted Specimen
Type status: Paratype. Occurrence: catalogNumber: KSMAAS- 23 - Tet-Pet-P 2; recordedBy: M. Kamran; individualCount: 1; sex: Female; lifeStage: adult; occurrenceID: E4BED139-7480-58C2-AEAF-502CB0507B02; Taxon: scientificName: Petrobia pakistanensis; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Prostigmata; family: Tetranychidae; genus: Petrobia; subgenus: Petrobia; Location: country: Pakistan; stateProvince: Khyber Pakhtunkhwa; locality: Abbotabad; verbatimElevation: 1,256 m; verbatimCoordinates: 34°08.427'N 73°17.135'E; decimalLatitude: 34.14046; decimalLongitude: 73.28559; georeferenceProtocol: GPS; Identification: identifiedBy: Muhammad Kamran; dateIdentified: 2023; Event: samplingProtocol: shaking plant foliage; eventDate: 15 / 7 / 2023; habitat: wild grasses; Record Level: language: en; collectionCode: Mites; basisOfRecord: Slide Mounted Specimen
Type status: Paratype. Occurrence: catalogNumber: KSMAAS- 23 - Tet-Pet-P 3; recordedBy: M. Kamran; individualCount: 1; sex: Female; lifeStage: adult; occurrenceID: 9F29037F-B50F-5CEB-8DB4-F048FADCD2FF; Taxon: scientificName: Petrobia pakistanensis; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Prostigmata; family: Tetranychidae; genus: Petrobia; subgenus: Petrobia; Location: country: Pakistan; stateProvince: Khyber Pakhtunkhwa; locality: Abbotabad; verbatimElevation: 1,256 m; verbatimCoordinates: 34°08.427'N 73°17.135'E; decimalLatitude: 34.14046; decimalLongitude: 73.28559; georeferenceProtocol: GPS; Identification: identifiedBy: Muhammad Kamran; dateIdentified: 2023; Event: samplingProtocol: shaking plant foliage; eventDate: 15 / 7 / 2023; habitat: wild grasses; Record Level: language: en; collectionCode: Mites; basisOfRecord: Slide Mounted Specimen
Type status: Paratype. Occurrence: catalogNumber: KSMAAS- 23 - Tet-Pet-P 4; recordedBy: M. Kamran; individualCount: 1; sex: Female; lifeStage: adult; occurrenceID: AA115F81-79C9-5DE0-A75D-F2FA9A951D75; Taxon: scientificName: Petrobia pakistanensis; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Prostigmata; family: Tetranychidae; genus: Petrobia; subgenus: Petrobia; Location: country: Pakistan; stateProvince: Khyber Pakhtunkhwa; locality: Abbotabad; verbatimElevation: 1,256 m; verbatimCoordinates: 34°08.427'N 73°17.135'E; decimalLatitude: 34.14046; decimalLongitude: 73.28559; georeferenceProtocol: GPS; Identification: identifiedBy: Muhammad Kamran; dateIdentified: 2023; Event: samplingProtocol: shaking plant foliage; eventDate: 15 / 7 / 2023; habitat: wild grasses; Record Level: language: en; collectionCode: Mites; basisOfRecord: Slide Mounted Specimen
Type status: Paratype. Occurrence: catalogNumber: KSMAAS- 23 - Tet-Pet-P 5; recordedBy: M. Kamran; individualCount: 1; sex: Female; lifeStage: adult; occurrenceID: 8B0C61C0-E8FE-5F44-9020-5F53EC4E0FC9; Taxon: scientificName: Petrobia pakistanensis; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Prostigmata; family: Tetranychidae; genus: Petrobia; subgenus: Petrobia; Location: stateProvince: Khyber Pakhtunkhwa; locality: Abbotabad; verbatimElevation: 1,256 m; verbatimCoordinates: 34°08.427'N 73°17.135'E; decimalLatitude: 34.14046; decimalLongitude: 73.28559; georeferenceProtocol: GPS; Identification: identifiedBy: Muhammad Kamran; dateIdentified: 2023; Event: samplingProtocol: shaking plant foliage; eventDate: 15 / 7 / 2023; habitat: wild grasses; Record Level: language: en; collectionCode: Mites; basisOfRecord: Slide Mounted Specimen
Type status: Paratype. Occurrence: catalogNumber: KSMAAS- 23 - Tet-Pet-P 6; recordedBy: M. Kamran; individualCount: 1; sex: Female; lifeStage: adult; occurrenceID: C85739B4-02FA-56EF-B8EA-004161D2BCFC; Taxon: scientificName: Petrobia pakistanensis; kingdom: Animalia; phylum: Arthropoda; class: Arachnida; order: Prostigmata; family: Tetranychidae; genus: Petrobia; subgenus: Petrobia; Location: stateProvince: Khyber Pakhtunkhwa; locality: Abbotabad; verbatimElevation: 1,256 m; verbatimCoordinates: 34°08.427'N 73°17.135'E; decimalLatitude: 34.14046; decimalLongitude: 73.28559; georeferenceProtocol: GPS; Identification: identifiedBy: Muhammad Kamran; dateIdentified: 2023; Event: samplingProtocol: shaking plant foliage; eventDate: 15 / 7 / 2023; habitat: wild grasses; Record Level: language: en; collectionCode: Mites; basisOfRecord: Slide Mounted Specimen
Description
Female (n = 7). Length of body excluding gnathosoma (v 2 - h 1) 510 (505‒518), including gnathosoma 695 (690–710), width (c 3 - c 3) 410 (400‒517); length of legs (from trochanter to distal end of tarsus): leg I 444 (441‒454); leg II 303 (300‒314); leg III 334 (327‒340); leg IV 391 (382‒399); leg I / v 2 - h 1: 0.87 (0.85–0.87).
Dorsum. (Fig. 1) Propodosomal shield well defined, punctate, two pairs of eyes; lateral propodosoma with longitudinal to oblique striations, opisthosomal striae transverse medially between setae c 1 - h 1, except sub-medially changing to inverted v-shaped striation pattern in-between e 2, dorsal striae fine without lobes and close (not so widely spaced). Dorsal setae lanceolate, slender serrate, without tubercles, shorter than the longitudinal distance between the setae next in line; lengths of dorsal setae v 2 42 (39‒45), sc 1 27 (26‒30), sc 2 18 (17‒20), c 1 17 (17‒18), c 2 17 (17‒18), c 3 18 (18‒19), d 1 14 (13‒14), d 2 15 (14‒15), e 1 15 (14‒16), e 2 23 (21‒24), f 1 33 (30‒34), f 2 33 (31‒33), h 1 30 (29‒31). Distances between dorsal setae v 2 - h 1 510 (505‒518), v 2 - v 2 70 (68‒71), sc 1 - sc 1 185 (171‒188), sc 2 - sc 2 285 (277‒295), c 1 - c 1 95 (92‒103), c 1 - c 2 64 (61‒65), d 1 - d 1 88 (82–90), d 1 - d 2 64 (59‒66), e 1 - e 1 85 (81–87), e 1 - e 2 54 (50‒57), f 1 - f 1 80 (77‒85), f 2 - f 2 70 (68‒76), f 1 - f 2 33 (33‒38), h 1 - h 1 35 (34–38), c 1 - d 1 77 (75‒81), d 1 - e 1 78 (76‒79), e 1 - f 1 82 (78‒86), f 2 - f 2 39 (38‒43), f 2 - h 1 49 (48‒53), f 1 - h 1 78 (75‒79).
Venter (Fig. 2). Area between setae 1 a – 3 a with transverse striae, 3 a – 4 a with longitudinal striae, anterior of genito-anal area with longitudinal striae; striae on venter without lobe; lengths of setae: 1 a 31 (30‒33), 1 b 40 (39–43), 1 c 22 (21‒23), 2 b 25 (25‒27), 2 c 25 (23‒28), 3 a 32 (30‒35), 3 b 21 (20‒24), 4 a 28 (27‒31), 4 b 20 (19‒22), one pair of aggenital setae (ag) 31 (27‒31), two pairs of genital setae, g 1 43 (40‒45), g 2 26 (26‒27), and three pairs of anal setae (ps 1‒3), ps 1 20 (20‒21), ps 2 19 (18‒20), ps 3 21 (20‒21), h 2 18 (18‒19), h 3 17 (17‒18). Spermatheca elongated tubular (Fig. 2 b).
Gnathosoma. Stylophore (Fig. 1 b) anteriorly without indentation, peritremes distally with long anastomosed ends, 47 (45‒48) long, 14 (13‒14) wide), ventral infracapitulum with one pair of adoral setae or 16 (15‒16) and one pair of subcapitular setae m 26 (25‒27). Palp five-segmented (Fig. 4), palptarsus with one solenidion ω 7 (5‒7), three eupathidia ul' ' ζ 8 (8‒10), ul' '' ζ 8 (7‒9), sul 9 (8‒11) and three simple setae a 13 (10‒13), b 12 (10‒13); c 11 (11‒12); palp tibia with three setae d 23 (19‒23), l' ' 16 (15‒18), l' 17 (16‒19) and one bifid claw distally, palp genu with one simple seta l' ' 28 (24‒28) and palp femur with one serrated seta d 34 (32‒36) (similar to dorsal setae).
Legs (Fig. 3). Leg I (trochanter to distal end of empodial claw) shorter than length of idiosoma. Leg segment setal formula as follows: coxae 2-2 - 1 - 1; trochanters 1-1 - 1 - 1; femora 9-6 - 4 - 4; genua 5-5 - 4 - 4; tibiae 13 + 1 φ) - 9-9 - 9; tarsi 18 + 3 ω + 2 dup- 14 + 1 dup- 13 + 1 dup- 13 + 1 dup. Length of solenidia on tarsi I ‒ IV: Iω ' 1 32 (30‒34), Iω ' 67 (66‒70), Iω " 75 (74‒78), IIω ” 47 (45‒48), IIIω’ 45 (43‒46), IV ω’ 46 (45‒47) and tibia I with Iφ 1 26 (25‒26). Most leg setae narrowly lanceolate, barbed; setae at tips of tarsi slender, smooth. Empodia I – IV with true claws pad-like, empodial claws bearing two rows of ventrally directed hairs.
Male and immature stages — Unknown.
Diagnosis
Propodosomal shield punctate; dorsal body setae lanceolate, barbed, short: setae c 1, d 1, e 1 not reaching beyond half-way between setal insertion and insertion in next row; tubercles absent, opisthosomal striae fine, smooth, without lobes and close; dorsal opisthosoma forming inverted v-shaped striation pattern between setae e; seta h 1 set on small tubercles; peritremes distally anastomosed, anastomosed part 44‒47 long and 13‒14 wide. Leg I (trochanter to distal end of tarsus) shorter than length of idiosoma; setal formula on leg segments: femora 9-6 - 4 - 4; genua 5-5 - 4 - 4; tibiae 13 (1 φ) - 9-9 - 9; tarsi 18 (1 ω + 2 dup) - 14 (1 dup) - 13 (1 dup) - 13 (1 dup).
Etymology
The new species is named after the name of country “ Pakistan ”, where the type specimens were collected.
Remarks
Petrobia pakistanensis sp. nov. resembles P. haematoxylon Meyer, 1987 and P. norbakhshi Khanjani, Khanjani & Seeman, 2016 (Meyer 1987 and Khanjani et al. 2016), by having the same setal formulae of coxae to femora and striation pattern on dorsum. However, P. pakistanensis sp. nov. differs from P. haematoxylon in: dorsal opisthosoma forming inverted v-shaped striation pattern between setae e 1 in the new species compared to transverse striae in P. haematoxylon; anastomosed part of peritremes more than three times as long as wide in the new species than as long as wide in P. haematoxylon; seta h 1 on small tubercles in new species compared seta h 1 without tubercles in P. haematoxylon and setae on tibia II and III each with nine setae versus 7 or 8 setae in P. haematoxylon. Additionally, P. pakistanensis sp. nov. differs from P. norbakhshi by propodosoma medially punctate compared to pebbled pattern in P. norbakhshi; genu III and IV each with four setae in new species compared to six setae each on genua III and IV in P. norbakhshi; tarsus I with 3 solenidion in new species compared to six or seven solenidion in P. norbakhshi; tarsus II with 14 (1 dup) setae as compared to tarsus II with 15 (1 ω + 1 dup) setae in P. norbakhshi.
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