Macrodinychus (Baloghmacrodinychus), Hirschmann, 1979

Kontschán, Jenő, 2011, Notes on the family Macrodinychidae (Acari: Uropodina) with description of two new species, Journal of Natural History 45 (25 - 26), pp. 1619-1636 : 1628-1634

Subgenus Baloghmacrodinychus Hirschmann, 1979

Baloghmacrodinychus Hirschmann 1979: 65

Macrodinychus: Hirschmann 1975b: 38 , Hirschmann 1979: 65, Wiśniewski and Hirschmann 1993: 32. (as baloghi -group)

Macrodinychus (Baloghmacrodinychus) baloghi Hirschmann, 1975

Macrodinychus baloghi Hirschmann, 1975a: 36 , Hirschmann 1975b: 37–39, Hirschmann 1975c: 39 and 43, Wiśniewski and Hirschmann 1993: 32, Wiśniewski 1993a: 283, Wiśniewski 1993b: 384.

Material examined

One female, on the slide “CAN-B 3q uc Australien 1965”, one male and one female on the slide “CAN-B 3q Australien 1968”, one female on the slide “CAN-B1 u, Hung. Soil Zool. Exp. Australia 1968” ( HNHM) .

Distribution

Australia.

Macrodinychus (Baloghmacrodinychus) hirschmanni Hiramatsu, 1977

Macrodinychus hirschmanni Hiramatsu, 1977: 20–22 , Wiśniewski and Hirschmann 1993: 32, Wiśniewski 1993a: 272, Wiśniewski 1993b: 384.

Distribution

Japan.

Macrodinychus (Baloghmacrodinychus) kaszabi Hirschmann, 1975

Macrodinychus kaszabi Hirschmann, 1975a: 36 , Hirschmann 1975b: 37– 39, Hirschmann 1975c: 39 and 43, Wiśniewski and Hirschmann 1993: 32, Wiśniewski 1993a: 281, Wiśniewski 1993b: 384.

Material examined

One male, on the slide “NG-WB 86 Neuguinea 68”, one male, on the slide “NG-WB 86 Neuguinea 68”( HNHM).

Distribution

New Guinea.

Macrodinychus (Baloghmacrodinychus) multipennus Hiramatsu, 1977

Macrodinychus multipennus Hiramatsu, 1977: 22–23 , Wiśniewski and Hirschmann 1993: 32, Wiśniewski 1993a: 272, Wiśniewski 1993b: 384.

Distribution

Japan.

Macrodinychus (Baloghmacrodinychus) shibai Hiramatsu, 1980

Macrodinychus shibai Hiramatsu, 1980: 23–24 , Wiśniewski and Hirschmann 1993: 32– 33, Wiśniewski 1993a: 279, Wiśniewski 1993b: 384.

Distribution

Indonesia, Malaysia.

Macrodinychus (Baloghmacrodinychus) vietnamensis Hirschmann, 1983

Macrodinychus vietnamensis Hirschmann, 1983: 76 , Wiśniewski and Hirschmann 1993: 34, Wiśniewski 1993a: 277, Wiśniewski 1993b: 384.

New records

One female: Thailand, Satun Prov., Thale bau N.P. in a primary moss forest, 1–5 January 1998., leg. A. Schultz and K. Vock ( NHMG, Geneva) .

Distribution

Vietnam and Thailand.

Notes

Wiśniewski and Hirschmann (1993) did not place this species into any of the species groups; on the basis of the peritreme shape (with several finger-like branches) I have moved it into subgenus Baloghmacrodinychus .

Macrodinychus (Baloghmacrodinychus) yoshidai Hirmatasu, 1979 Macrodinychus yoshidai Hirmatasu, 1979: 104–105 , Wiśniewski and Hirschmann 1993: 33, Wiśniewski 1993a: 272, Wiśniewski 1993b: 384.

Distribution

Japan.

Macrodinychus (Baloghmacrodinychus) extremicus sp. nov.

Material examined

Holotype: male. Thailand, Phang Nga Prov., Khao Lak N.P., Tone Chony Fa Fall , 100–300 m, 6–15 January 1998. leg. A. Scultz and K. Vock. The holotype stored in alcohol and deposited in Natural History Museum Geneva ( NHMG).

Description

Male.

Length of idiosoma 1630 µm, width 950 µm (n = 1). Shape oblong, posterior margin rounded.

Dorsal idiosoma ( Figure 2A ). Dorsal and marginal shields not fused anteriorly. Isolated pygidial shield present, with alveolar pattern and without setae. Two halfring-form cavities can be seen in the central region of dorsal shield. Margin of cavities covered by bulbiform setae. Crenellation can be found between marginal and dorsal shields. All dorsal and marginal setae bulbiform with short hairs on their margins ( Figure 2 B ). Dorsal shield bears alveolar ornamentation.

Ventral idiosoma ( Figure 2 C ). Sternal and ventral shields bear large, alveolar ornamentation. Shape and situation of sternal setae as follows: St1 and St2 bulbiform and placed near the level of coxae II. St3 smooth, needle-like and inserted near the anterior margin of coxae II. St4 and St5 bulbiform, St4 placed near the posterior margin of coxae II, St5 near the anterior margin of coxae IV. All ventral setae bulbiform. Scabellum covered by tile-like pattern.

Genital shield circular, without ornamentation.

Stigmata situated between coxae II and III. Peritreme with several finger-like branches.

Legs with serrated setae.

Gnathosoma. Corniculi, internal malae, epistome, hypostomal setae and chelicerae not clearly visible (covered by coxae I).

Female, nymphs and larvae are unknown.

Etymology

The name of the new species refers to the several extreme characters (bulbiform setae, dorsal cavities) that are unique in this family.

Remark

The dorsal cavities and dorsal and ventral setae are unique in this family.

Notes

Unfortunately the new species is known from a male holotype only and more collections are needed in the type locality.

Key to the species

1. Peritreme with several finger-like branches (subgenus Baloghmacrodinychus Hirschmann, 1979 ) ( Figure 3 J )......................................... 4

Peritreme without branches............................................. 2

2. Peritreme short, hook-form (subgenus Bregetovamacrodinychus Hirschmann, 1979 ) ( Figures 3 D–F )................................................. 11

Peritreme long.......................................................... 3

3. Peritreme mushroom-shaped, with several nooses (subgenus Loksamacrodinychus Hirschmann, 1979 ) ( Figures 3 G–I )................. 14

Peritreme U-form, S-form or snake-form (subgenus Macrodinychus Berlese, 1917 ) ( Figures 3 A–C )................................................. 19

4. Isolated pygidial shield absent.............................. M. multipennus

Isolated pygidial shield present.......................................... 5

5. Dorsal and ventral shields with bulbiform setae.............. M. extremicus

Dorsal and ventral shields without bulbiform setae....................... 6

6. Dorsal setae smooth.................................................... 7

Dorsal setae with hairs on their margins................................. 8

7. Isolated pygidial shield with setae.......................... M. vietnamensis

Isolated pygidial shield without setae........................... M. kaszabi

G H I J

8. Isolated pygidial shield with setae................................ M. shibai

Isolated pygidial shield without setae.................................... 9

9. Apical part of dorsal setae wide, a little bulbiform and bear short hairs.. M. yoshidai

Dorsal setae needle-like with hairs on their margins..................... 10

10. Alveolar ornamentation on the lateral part of dorsal shield, genital shield of female with some alveolar pattern.............................. M. baloghi

Alveolar ornamentation on whole dorsal shield, genital shield of female without pattern................................................ M. hirschmanni

11. Dorsal and ventral shields with reticulate pattern............ M. bregetovaae

Dorsal and ventral shields without reticulate pattern.................... 12

12. Dorsal and ventral setae tree-like and without small alveolar cavities................................................................ 13

Dorsal- and ventral setae not tree-like and with small alveolar cavities................................................................ M. urosai

13. Peritreme V-shaped, all ventral setae tree-like.............. M. multispinosus

Peritreme C-shaped, several setae smooth on the caudal and lateral parts of ventral shield.................................................. M. hutuae

14. Posterior region of ventral shield with bulbiform ventral setae.. M. andrassyi

Ventral shield without bulbiform setae.................................. 15

15. Peritreme mushroom-shaped with several nooses........................ 16

Peritreme mushroom-shaped without nooses..................... M. loksai

16. Setae on caudal part of the dorsal shield smooth............ M. iriomotensis

Setae on caudal part of the dorsal shield bear short hairs on their margins 17

17. First sternal setae with short hairs on their margins....... M. yonakuniensis

First sternal setae with smooth margins........................... M. zicsii

18. Isolated pygidial shield present......................................... 20

Isolated pygidial shield absent.......................................... 22

19. Ventral and dorsal setae placed in alveolar cavities............ M. malayicus

Ventral and dorsal setae not situated in alveolar cavities................. 21

20. Ventral and dorsal setae short, ventral and dorsal shields with alveolar ornamentation................................................... M. alveolaris

Ventral and dorsal setae long, ventral and dorsal shields without ornamentation........................................................ M. durmei

21. Dorsal and ventral setae placed in small alveolar cavities................. 23

Dorsal and ventral setae not situated in alveolar cavities. M. parallelepipedus

22. Setae on anterior region of sternal shield smooth............... M. sellnicki

Setae on anterior region of sternal shield pilose............... M. mahunkai

Figures

Figure 2. Macrodinychus (Baloghmacrodinychus) extremicus sp. nov., male. (A) Dorsal idiosoma; (B) dorsal and marginal setae; (C) ventral idiosoma. Scale bar 100 µm.

Figure 3. Schematic drawings showing the types of peritremes in Macrodinychid species. (A–C) U-shaped – subgenus Macrodinychus: (A) M. (M.) sellnicki; (B) M. (M.) parallelepipedus; (C). M. (M). malayicus; (D–F) hook-shaped – subgenus Bregetovamacrodinychus: (D) M. (B.) bregetovaae; (E) M. (B.) kurosai; (F) M. (B.) multispinosus); (G–I) mushroom-shaped – subgenus Loksamacrodinychus: (G) M. (L.) andrassyi; (H) M. (L.) yonakuniensis; (I) M. (L.) iriomotensis); (J) several finger-like branches in peritreme (subgenus Baloghmacrodinychus: M. (Ba.) extremicus). (E), (H) and (I) after Hiramatsu 1979; (A–D), (F), (G) and (J) original.