Macrodinychus Berlese , 1917

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 : 1622-1625

Subgenus Macrodinychus Berlese, 1917

Macrodinychus Berlese, 1917: 12 , Hirschmann 1975b: 38, Hirschmann 1979: 65, Wiśniewski and Hirschmann 1993: 34.

Macrodinychus (Macrodinychus) alveolaris Kontschán, 2006

Macrodinychus alveolaris Kontschán 2006: 60–61 .

Distribution

Kenya.

Macrodinychus (Macrodinychus) durmei Hirschmann, 1983

Macrodinychus durmei Hirschmann, 1983: 73 , Wiśniewski and Hirschmann 1993: 34, Wiśniewski 1993a: 247, Wiśniewski 1993b: 384.

Distribution

Zaire.

Notes

Wiśniewski and Hirschmann (1993) did not place this species into any of species groups; on the basis of the shape of the peritreme (U-shaped) it is moved into subgenus Monomacrodinychus .

Macrodinychus (Macrodinychus) mahunkai Hirschmann, 1975

Macrodinychus mahunkai Hirschmann, 1975a: 36 , Hirschmann 1975b: 37–38, Hirschmann 1975c: 39–41, Wiśniewski and Hirschmann 1993: 34, Wiśniewski 1993a: 230, Wiśniewski 1993b: 383.

Material examined

One female, on the slide “LL-B-10a” ( HNHM).

Distribution

Bolivia.

Macrodinychus (Macrodinychus) parallelepipedus Berlese, 1916

Urodinychus parallelepipedus Berlese, 1916: 142 .

Macrodinychus parallelepipedus Hirschmann, 1975a: 36 , Hirschmann 1975b: 37–38, Hirschmann 1975c: 39 and 41, Wiśniewski and Hirschmann 1993: 34, Wiśniewski 1993a: 232, Wiśniewski 1993b: 383.

Macrodinychus paraguayensis Hirschmann, 1975a: 36 , Hirschmann 1975b: 37–38, Hirschmann, 1975c: 39–40, Wiśniewski and Hirschmann 1993: 34, Wiśniewski 1993a: 235, Wiśniewski 1993b: 383. syn. nov.

Material examined

One female, on the slide “45-2e” ( HNHM).

Remarks

Hirschmann (1975a) mentioned only the shape of the central region of the peritreme as a distinguishing character between M. parallelepipedus and M. paraguayensis , (the central region of the peritreme in M. paraguayensis turns anteriorly, but this character is missing in M. parallelepipedus ). This slight difference is insufficient for justifying separation of a new species, therefore M. paraguayensis should not be regarded else than a junior synonym name of M. parallelepipedus .

New records

One female: Suriname, ( Suriname 1521) Mites on Passalus species, 1932 leg.G. Bunzli. ( NHM, London).

Distribution

Brazil, Paraguay and Suriname.

Macrodinychus (Macrodinychus) sellnicki Hirschmann and Zirngiebl-Nicol, 1975

Macrodinychus sellnicki Hirschmann, 1975a: 36 , Hirschmann 1975b: 37–38, Hirschmann 1975c: 39 and 41, Wiśniewski and Hirschmann 1993: 34, Wiśniewski 1993a: 236, Wiśniewski 1993b: 383, Gonzales et al. 2004: 143–149, Krantz et al. 2007: 29–38.

New records

One female: Saint Lucia, Castries, Piton Flore, from litter, 11 July 1980. leg. S. Mahunka and L. Mahunka-Papp; one female: Saint Lucia, Castries, Marigot Harbour , from moss, 17 July 1980. leg. S. Mahunka and L. Mahunka-Papp. One female: Dominican Republic, near Constanza , rainforest fragment, from litter, 18 November 2003. leg. J. Kontschán. Two females: Costa Rica, Turrialba , 600 m, Agricultural Research Station Catie, primary rainforest, from soil, 12 January 1993. leg. J. Balogh ( HNHM, Budapest). One female and one male: Suriname, 1932, leg. G. Bunzli (without any other information on the specimen), Three females and two males: Suriname, from ants 1932, leg. G. Bunzli, ( NHM, London) .

Distribution

Caribbean Islands, Central and South America.

Macrodinychus (Macrodinychus) malayicus sp.nov.

Material examined

Holotype: male. Leaf litter and soil under jungle trees, Kuala Lumpur Peninsular, Malaysia, 21 September 1980. leg. J.D. George. Paratype: one male, locality and date same as holotype. Holotype and paratype are stored in alcohol and deposited in the Natural History Museum, London.

Description

Male. Length of idiosoma 840–850 µm, width 540–550 µm (n = 2). Shape oblong, posterior margin rounded.

Dorsal idiosoma ( Figure 1A ). Dorsal and marginal shields not fused anteriorly. Isolated pygidial shield present with smooth surface and bears two pairs of pilose setae. Dorsal setae with short hairs on their margins, and placed in small alveolar cavities ( Figure 1B ). Crenellation can be found between the marginal and dorsal shields on the central and posterior regions. Marginal setae in these regions without small, alveolar cavities. These cavities bear pilose setae and they are only present on the anterior region of marginal shield.

Ventral idiosoma ( Figure 1C ). Sternal and ventral shields covered by small, alveolar cavities, these cavities bear setae with short hairs on their margins ( Figure 1D ). Several small alveolar ornamentations can be found near the metapodal line.

Genital shield circular, with small alveolar ornamentation.

Stigmata situated between coxae II and III. Peritremes wide and U-shaped.

Legs with serrated setae.

Gnathosoma. Corniculi, internal malae, epistome, hypostomal setae and 210 chelicerae not clearly visible (covered by coxae I).

Female, nymphs and larvae are unknown.

Etymology

The name of the new species refers to the country ( Malaysia) where the species was collected.

Remark

The small alveolar cavities on the dorsal, ventral and sternal shields distinguish the new species from all the others in this subgenus.

Notes

Unfortunately the new species is known from two males only and more collections are needed in the type locality.

Figures

Figure 1. Macrodinychus (Macrodinychus) malayicus sp. nov., male. (A) Dorsal idiosoma; (B) dorsal setae and ornamentation; (C) ventral idiosoma; (D) ventral setae and ornamentation. Scale bar 100 µm.