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Jul 18, 2018 - KONTSCHÁN: TWO NEW SPECIES OF ANGULOBALOGHIA FROM BRUNEI in ethanol and deposited in the Natural History Museum in ...
Systematic & Applied Acarology 23(7): 1366–1374 (2018) http://doi.org/10.11158/saa.23.7.13 Article

ISSN 1362-1971 (print) ISSN 2056-6069 (online)

http://zoobank.org/urn:lsid:zoobank.org:pub:A4785F50-4F7B-427D-8B43-486D4E3DEA39

Two new species of Angulobaloghia Hirschmann, 1979 (Acari: Rotundabaloghidae) from Brunei JENŐ KONTSCHÁN Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 102, Hungary. E-mail: [email protected]

Abstract Two new species of Angulobaloghia Hirschmann, 1979 were discovered in Brunei. Angulobaloghia bruneiensis sp. nov. differs from the congeners in the following unique character combination: sternal setae St1–St3 wide and robust and genital shield of female subtriangular with long anterior process. The second species, Angulobaloghia pallgergelyi sp. nov., has long and triangular genital shield covered by large oval pits in the female and long setae V7 and V8 in the both gender, which is also unique character combination within the genus Angulobaloghia. A new diagnosis of the genus Angulobaloghia and a new key to the known Angulobaloghia species are given. Key words: Soil mites, Uropodina, taxonomy, Borneo

Introduction The genus Angulobaloghia was established by Hirschmann (1979) for these Rotundabaloghia Hirschmann, 1975a species which have triangular-shaped female genital shield. Later Hirschmann and his co-authors (Wiśniewski & Hirschmann 1993; Wiśniewski 1993) moved the Angulobaloghia species into a species group of Rotundabaloghia. Several years later, Kontschán (2010) reestablished this genus based on morphological analysis and after that numerous new species described from South-East Asia (Kontschán 2014, 2015; Kontschán & Kiss 2016; Kontschán & Starý 2011) and from India (Kontschán 2011). Currently 16 species are known from this genus, majority (11 species) from South-East Asia, three species are from New-Guinea and two from the Indian subcontinent (Kontschán 2008, 2010, 2014, 2015; Kontschán & Kiss 2016; Kontschán & Starý 2011). This work is a new part of the study of South-East Asian rotundabaloghiid mites (Kontschán 2014, 2015; Kontschán & Kiss 2016) which is based on the investigation of the Arachnida collection of the Natural History Museum in Geneva. Due to the several described new Angulobaloghia species at the last some years (Kontschán 2011, 2014, 2015; Kontschán & Starý 2011; Kontschán & Kiss 2015) it is important to re-define the genus Angulobaloghia as well.

Material and methods Specimens of the two new Angulobaloghia species were cleared in lactic acid and the drawings were made with the aid of a drawing tube of Leica 1000 scientific microscope. All specimens are stored

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in ethanol and deposited in the Natural History Museum in Geneva, Switzerland (MHNG). The nomenclature of the ventral setation follows Kontschán (2010). Abbreviations: h = hypostomal setae, St = sternal setae, ad = adanal setae, V = ventral setae. All measurements and the scales in the figures are given in micrometres (μm).

Taxonomy Genus Angulobaloghia Hirschmann, 1979 Angulobaloghia Hirschmann 1979: 61. Angulobaloghia: Kontschán 2009: 22. Type species. Angulobaloghia angulogynella (Hirschmann, 1975b) by original designation. Diagnosis. Small mites, length of idiosoma 250–600. Dorsal idiosoma very convex. Dorsal shield fused with marginal shield. Ventral setae reduced. Dorsal setae homotrich. Genital shield of female subtriangular, quadrangular or semicircular with or without spine-like process on its anterior margin. Peritremes mushroom-shaped or hookshaped. Distribution. New Guinea, Indonesia, Philippines, Japan, Vietnam (Kontschán 2010), India (Kontschán 2011), Malaysia (Kontschán 2014). Remark. Majority of the described Angulobaloghia species have a triangular genital shield, only two species have different shapes of female genital shield, A. danyii (Kontschán, 2008) with semicircular and A. rutra Kontschán, 2014 and quadrangular genital shields, respectively. These two species have very convex dorsal idiosoma, where the dorsal shield is fused with the marginal shield and the number of the ventral setae is reduced. These characters can be found only in the members of the family Rotundabaloghidae (Kontschán 2010). The other genera within Rotundabaloghidae have scutiform or linguliform female genital shield (see Kontschán 2010). Therefore systematic positions of the two latter mentioned species are in the genus Angulobaloghia.

Angulobaloghia bruneiensis sp. nov. (Figures 1–9) Diagnosis. Sternal shield of female and male ornamented by oval pits, majority of sternal setae (St1, St2 and St3 in females and St1, St2 and St4 in males) wide and robust. Female genital shield triangular with anterior process and smooth surface. Setae V7 and V8 longer than V2 and V6. Material examined. Holotype. Female. Brunei, (Belait District): Sungai Liang, “Arboretum Forest Reserve”, forêt primaire (“Mixed dipterocarp forest”), prélèvement de sol dans les angles formés par les contreforts de deux arbres appelés “Nyatho”, 90 m; 21 Nov. 1988; B. Hauser coll. Paratypes. Four females and four males, collection data as in holotype. Description Female (n=5). Length of idiosoma 285–290, width 240–260. Shape circular, posterior margin rounded, colour reddish brown. Dorsal idiosoma (Figure 1). Marginal and dorsal shields fused. Dorsal setae basally curved on idiosomal margins and straight on central area of body, margins of all dorsal setae pilose (ca 55–60).

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Two pairs of lyriform fissures situated on anterior area of dorsal shield. Surface of dorsal shield covered by oval pits (ca 5×6).

FIGURES 1–5. Angulobaloghia bruneiensis sp. nov., female, holotype. 1. Dorsal view of idiosoma. 2. Ventral view of idiosoma. 3. Ventral view of gnathosoma and lateral view of palp. 4. Lateral view of chelicera. 5. Intercoxal area of male paratype.

Ventral idiosoma (Figure 2). Sternal shield covered by oval pits. All sternal setae smooth, St1– St3 wide and robust (ca 9–13), St4 short (ca 5–6) and needle-like. St1 situated at level of anterior margin of coxae II, St2 at level of central area of coxae III, St3 at level of central area of coxae IV, St4 close to St3. Ventral setae smooth and needle-like V2 and V6 short (ca 8–10), V7 and V8 long (ca 23–26). V2 situated near basal line of genital shield, V7 and V8 situated near end of pedofossae IV and V6 between V2 and V7. Setae ad similar in shape and length to V2 and V6, situated lateral to anal opening. Ventral shield covered by some reticulation. One pair of lyriform fissures situated between setae St2 and St3, one pair close to basal edges of genital shield and one pair of lyriform fissures and one pair of poroids close to ad. Stigmata situated between coxae II and III. Peritremes with a short straight poststigmatid part and a longer hook-shaped prestigmatid part. Genital shield wide, 1368

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triangular (57–60 long and 50–52 wide at base), with a long (ca 30–33) apical process. Surface of genital shield smooth. Pedofossae deep, their surface smooth, separate furrows for tarsi IV present. Base of tritosternum narrow, vase-like, tritosternal laciniae smooth, subdivided into three smooth branches in its distal half. Gnathosoma (Figure 3). Corniculi horn-like, internal malae smooth and as long as corniculi. Hypostomal setae (h1, h2, h3 and h4) long (ca 9–14), smooth and needle-like. Apical part of epistome marginally pilose. Palp with smooth setae except one ventral seta on palp trochanter distally divided (Figure 3). Fixed digit of chelicerae longer than movable digit and both digits bearing one central tooth and one apical sensory organ on fixed digit. Internal sclerotized node present (Figure 4). Legs (Figures 6–9). All legs with ambulacral claws and smooth and needle-like setae, but the claws on first leg shorter than others. All femora bearing flap-like ventral processes. Leg I 146–150, leg II 130–135, leg III 118–124, leg IV 140–144.

FIGURES 6–9. Angulobaloghia bruneiensis sp. nov., female, holotype. 6. Leg I. in lateral view. 7. Leg II in lateral view. 8. Leg III in lateral view. 9. Leg IV in lateral view.

Male (n=4). Length of idiosoma 280–300 width 230–260 (n=4). Dorsal idiosoma. Ornamentation and chaetotaxy of dorsal shield as for female. Venteral idiosoma (Figure 5). Four pairs of sternal setae situated anterior to genital shield, St1, St3 and St4 smooth, wide and robust (ca 8–11 long), St2 short (ca 5–6 long) and needle-like. Two pairs of lyriform fissures situated on sternal shield, first pair between St2 and St3, second pair close to anterior margin of genital shield. Surface of sternal shield with numerous oval pits anterior to genital shield. Surface of ventral shield, and shape and size of ventral setae as in female. Genital shield oval and situated between coxae IV. Larva and nymphs unknown. Etymology. The name of the new species refers the country where this species was collected.

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Remark. The triangular genital shield with an anterior process and the wide and robust sternal setae are distinctive character states for A. bruneiensis within the genus Angulobaloghia Hirschmann, 1979.

Angulobaloghia pallgergelyi sp. nov. (Figures 10–18) Diagnosis. Genital shield of female narrow and triangular, its surface covered by oval pits. Sternal setae St1 situated in a small pits. Ventral shield covered by some oval pits, V2 and V6 shorter than V7 and V8. Sternal shield of males with some deep and oval pits in a separate group between St1 and St2. Material examined. Holotype. Female. Brunei, (Belait District): Sungai Liang, “Arboretum Forest Reserve”, forêt primaire (“Mixed dipterocarp forest”), prélèvement de sol dans les angles formés par les contreforts de deux arbres appelés “Nyatho”, 90 m; 21. Nov. 1988; B. Hauser coll. Paratypes. Four females and five males, locality and date same as in holotype.

FIGURES 10–14. Angulobaloghia pallgergelyi sp. nov., female, holotype. 10. Dorsal view of idiosoma. 11. Ventral view of idiosoma. 12. Ventral view of gnathosoma and coxae I. 13. Lateral view of chelicera. 14. Intercoxal area of male paratype.

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Description Female (n=5). Length of idiosoma 285–300, width 265–280. Shape circular, posterior margin rounded, colour reddish brown. Dorsal idiosoma (Figure 10). Marginal and dorsal shields fused. Dorsal setae straight and their marginally serrate (ca 29–36). Two pairs of lyriform fissures situated on central area of dorsal shield. Surface of dorsal shield covered by oval pits (ca 5×4). Ventral idiosoma (Figure 11). Surface of sternal shield smooth. All sternal setae smooth, needlelike. St1 and St2 long (ca 8–9), St3 longer (ca 14–15), St4 short (ca 5–6). St1 placed in a small pit and situated at level of anterior margin of coxae II, St2 at level of anterior margin of coxae III, St3 at level of posterior margin of coxae III, St4 at level of anterior margin of coxae IV. Ventral setae smooth and needle-like V2 and V6 short (ca 5–7), V7 and V8 long (ca 18–24). V2 situated near basal line of genital shield, V7 and V8 situated near end of pedofossae IV and V6 lateral to V2. Setae ad longer than V2 and V6 (ca 9–10) and situated laterally to anal opening. Ventral shield covered by some oval pits. One pair of lyriform fissures situated close to basal edges of genital shield and one pair close to setae V7 and V8 and one pair close to lateral margin of anal opening. Stigmata situated between coxae II and III. Peritremes with a short straight poststigmatid part and a longer hook-shaped prestigmatid part. Genital shield narrow and triangular (ca 48–50 wide at base, ca 118–120 long), without apical process. Surface of genital shield with numerous large pits (ca 5×4). Pedofossae deep, their surface smooth, separate furrows for tarsi IV present. Base of tritosternum narrow, vase-like, tritosternal laciniae smooth, subdivided into four smooth branches in its distal half (Figure 12). Gnathosoma (Figure 12). Corniculi horn-like, internal malae smooth and as long as corniculi. Hypostomal setae h1 longer (ca 16–17), h2, h3 and h4 shorter (ca 6–8), all smooth and needle-like. Apical part of epistome marginally pilose. Palp trochanter with a distally subdivided ventral setae, other setae on palp smooth. Fixed digit of chelicerae longer than movable digit and both digits bearing one central tooth and one apical sensory organ on fixed digit. Internal sclerotized node present (Figure 13). Legs (Figures 15–18). All legs with ambulacral claws and smooth and needle-like setae, but the claws on first leg shorter than others. All femora bearing flap-like ventral processes. Leg I 180–190, leg II 175–180, leg III 170–176 long, leg IV 180–184 long. Male (n=5). Length of idiosoma 314–335, width 265–285 (n=5). Dorsum. Ornamentation and chaetotaxy of dorsal shield as for female. Venter (Figure 14). Four pairs of smooth and needle-like sternal setae situated anterior to genital shield, St1, St2, St3 and St4 longer (13–16 long), St5 shorter (7–8 long). Two pairs of lyriform fissures situated on sternal shield, first pair close to St1, second pair close to St2. Surface of sternal shield with some oval pits between St2 and genital shield, deep and oval pits situated in a separate group between St1 and St2 on sternal shield. Surface of ventral shield, and shape and size of ventral setae as in female. Genital shield oval and situated between coxae IV. Larva and nymphs unknown. Etymology. I dedicate the new species to my dear friend, Dr. Barna Páll-Gergely malacologist. Remark. The narrow and triangular genital shield is observable in the species Angulobaloghia angustigynella (Hirschmann, 1975b), Angulobaloghia scrobia Kontschán & Starý, 2011 and Angulobaloghia aoki (Hiramatsu, 1977). Most important characters among these four species are summarized in Table 1.

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FIGURES 15–18. Angulobaloghia pallgergelyi sp. nov., female, holotype. 15. Leg I and tritosternum in ventral view. 16. Leg II in lateral view. 17. Leg III in lateral view. 18. Leg IV in lateral view.

TABLE 1. Distinguishing characters among the Angulobaloghia pallgergelyi, A. angustigynella, A. scrobia and A. aoki. A. pallgergelyi

A. angustigynella

A. scrobia

A. aoki

Anterior margin of rounded and between rounded and between rectangular and close to rectangular and close genital shield central area of coxae II posterior margin of coxae II anterior margin of sternal to anterior margin of shield sternal shield St1

placed in small pits

not placed in small pits

not placed in small pits

not placed in small pits

Pits on genital shield of female

large

small

large

large

smooth

ornamented by oval pits

Surface of ventral ornamented by oval pits smooth shield

Key to species of Angulobaloghia, based on females (modified, after Kontschán 2015): 1. 2. 3. 4. -

Ventral shield ornamented by oval pits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Ventral shield smooth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Anterior margin of genital shield reaches to coxae II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Anterior margin of genital shield reaches to coxae III . . . . . . . . . ..A. pedunculata Kontschán & Kiss, 2015 Anterior margin of genital shield rounded, St1 situated on pits . . . . . . . . . . . . . . . . .A. pallgergelyi sp. nov. Anterior margin of genital shield rectangular, St1 not situated on pits . . . . . . . . A. aokii (Hiramatsu, 1977) Genital shield of female triangular. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Genital shield of female not triangular. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

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5. 6. 7. 8.

Female genital shield quadrangular with long anterior process . . . . . . . . . . . . . . . A. rutra Kontschán, 2014 Female genital shield semicircular with short anterior process . . . . . . . . . . . . . A. danyii (Kontschán, 2008) Peritremes mushroom-shaped . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Peritremes hook-shaped . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Genital shield with ornamentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Genital shield without ornamentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 St3 three times longer than other sternal setae. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. cuyi (Hiramatsu & Hirschmann in Hirschmann & Hiramatsu, 1992) - St3 as long as other sternal setae . . . . . . . A. pyrigynella (Hirschmann in Hirschmann & Hiramatsu, 1992) 9. Sternal shield with ornamentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. vietnamensis (Kontschán, 2008) - Sternal shield without ornamentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. triangulata (Kontschán, 2008) 10. Sternal shield with ornamentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 - Sternal shield without ornamentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 11. St2 and St3 three times longer than St1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. indica Kontschán, 2011 - St2 and St3 as long as St1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 12. Anterior process on genital shield present . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. bruneiensis sp. nov. - Anterior process on genital shield absent... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..A. luzonensis (Hiramatsu & Hirschmann in Hirschmann & Hiramatsu, 1992) 13. Genital shield with ornamentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 - Genital shield without ornamentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 14. Anterior margin of genital shield smooth and rounded, setae V6 smooth . . . . . . . . . . . . . . . . . . . . . . . . . 15 - Anterior margin of genital shield serrate, setae V6 with one pair of lateral spines.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. scrobia Kontschán & Starý, 2011 15. Basal part of genital shield narrow, V6 situated near V7 and V8. . . . . angustigynella (Hirschmann, 1975b) - Basal part of genital shield wide, V6 situated in central area of ventral shield . . .A. staryi Kontschán, 2015 16. St2 and St3 three times longer than St1 . . . . . . . . . . . . . . . . . . . . . . A. angulogynella (Hirschmann, 1975b) - St2 and St3 as long as St1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 17. Additional setae on sternal shield present . . . . . . . . . . . . . . . . . . . . . . . A. latigynella (Hirschmann, 1975b) - Additional setae on sternal shield absent . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A. tamilica Kontschán, 2011

Discussion The genus Angulobaloghia is a typical Oriental-Australasian group of the soil mites. Seems to be that the origin of this genus can be in South-East Asia, and from this region mites of this genus colonized the Japan, Papua New Guinea and India, after the collision with the Eurasia (Kontschán 2011). Till today only three Angolubaloghia species are known from Indonesian (Kontschán 2010) and Malaysian (Kontschán 2014) parts of Borneo, but the majority of this island is absolutely unknown from rotundabaloghid mite point of view.

Acknowledgement I am very grateful to Dr. Peter Schwendinger (MHNG) for his kind hospitality during my stay in Geneva.

References Hiramatsu, N. (1977) Gangsystematik der Parasitiformes. Teil 239. Teilgang einer neuen Rotundabaloghia-Art aus Japan (Dinychini, Uropodinae). Acarologie, Schriftenreihe für Vergleichende Milbenkunde, 23, 19– 20. Hirschmann, W. (1975a) Gangsystematik der Parasitiformes. Teil 201. Die Gattung Rotundabaloghia nov. gen.

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Hirschmann 1975 (Dinychini, Uropodinae). Acarologie, Schriftenreihe für Vergleichende Milbenkunde, 21, 23–26. Hirschmann, W. (1975b) Gangsystematik der Parasitiformes. Teil 203. Teilgänge, Stadien von 16 neuen Rotundabaloghia-Arten (Dinychini, Uropodinae). Acarologie. Schriftenreihe für Vergleichende Milbenkunde, 21, 28–34. Hirschmann, W. (1979) Stadiensystematik der Parasitiformes Teil 1. Stadienfamilien und Stadiengattungen der Atrichopygidiina, erstellt im Vergleich zum Gangsystem Hirschmann, 1979. Acarologie. Schriftenreihe für Vergleichende Milbenkunde, 26, 57–68. Hirschmann, W. & Hiramatsu, N. (1992) 34 Rotundabaloghia-Arten aus Asien (Japan, Neuguinea, Philippinen, Borneo) (Dinychini, Uropodinae). Acarologie, Schriftenreihe für Vergleichende Milbenkunde, 39, 9–25. Kontschán, J. (2008) New and rare Rotundabaloghia species (Acari: Uropodina) from the tropics. Opuscula Zoologica (Budapest), 38, 15–41. Kontschán, J. (2010) Rotundabaloghiid mites of the world (Acari: Mesostigmata: Uropodina). Ad Librum Kiadó, Budapest, 116 pp. Kontschán, J. (2011) First record of the family Rotundabaloghiidae Hirschmann, 1975 in India, with description of two new species of Angulobaloghia Hirschmann, 1975 (Acari: Mesostigmata: Uropodina). Opuscula Zoologica (Budapest), 42, 121–124. Kontschán, J. (2014) Three new rotundabaloghid mites (Acari, Uropodina) from Sabah (Malaysia). Zookeys, 447, 35–45. http://dx.doi.org/10.3897/zookeys.447.8389 Kontschán, J. (2015) Three new rotundabaloghid mites (Acari: Uropodina) from Hong Kong. Revue Suisse de Zoologie, 122, 45–54. Kontschán, J. & Kiss, B. (2016) Five new rotundabaloghiid mites (Acari: Uropodina) from South-East Asia. Zootaxa, 4021(4), 515–528. http://dx.doi.org/10.11646/zootaxa.4021.4.2 Kontschán, J. & Starý, J. (2011) Uropodina species from Vietnam (Acari: Mesostigmata). Zootaxa, 2807, 1– 28. Wiśniewski, J. (1993) Gangsystematik der Parasitiformes. Teil 549. Die Uropodiden der Erde nach Zoogeographischen Regionen und Subregionen geordnet (Mit Angabe der Lande). Acarologie. Schriftenreihe für Vergleichende Milbenkunde, 40, 221–291. Wiśniewski, J. & Hirschmann, W. (1993) Gangsystematik der Parasitiformes. Teil 548. Katalog der Ganggattungen, Untergattungen, Gruppen und Arten der Uropodiden der Erde. Acarologie. Schriftenreihe für Vergleichende Milbenkunde, 40, 1–220. Submitted: 6 May 2018; accepted by Shahrooz Kazemi: 6 Jul. 2018; published: 18 Jul. 2018

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