Pergalumna iunctiporosa, Bayartogtokh & Akrami, 2014

Bayartogtokh, Badamdorj & Akrami, Mohammad Ali, 2014, The soil mite family Galumnidae of Iran (Acari: Oribatida), Journal of Natural History 48 (15), pp. 881-917 : 905-909

Pergalumna iunctiporosa sp. nov.

( Figures 9E–H , 12 , and 13)

Diagnosis

With typical characters of Pergalumna (lamellar and sublamellar lines present; alveolus of lamellar seta inserted mediad of line L; anterior margin of notogaster mostly interrupted; notogastral median pore present or absent); rostrum with small triangular central carina and minute lateral carina of subtriangular shape; rostral and lamellar setae thin, finely barbed; interlamellar seta long, thin, finely barbed; sensillus medium long, setiform, finely barbed at distal half; porose area Aa nearly round or slightly oval, A 1 and A 2 joined together, forming a large irregular oval porose area, A 3 oval; median pore present, consisted of three to five small pores; postanal porose area nearly round in shape.

Measurements

Holotype: body length 592 µm, width of notogaster 464 µm, length of notogaster 496 µm; paratypes (n = 5): body length 555–610 (584) µm, width of notogaster 490– 540 (512) µm.

Description

Integument. Body colour dark brown. Cuticle of body and legs with minute granules; epimeral region few microtubercles; pteromorph with large granules.

Prodorsum. Rostrum with small triangular central carina and minute lateral carina of subtriangular shape, clearly seen in dorsofrontal view ( Figures 9E , 12B , and 13A ). Rostral seta thin, 72–78 µm long, finely barbed, inserted ventrally and visible in dorsofrontal view. Lamellar seta thin, 98–106 µm long, finely barbed. Interlamellar seta thin, 102–107 µm long, finely barbed ( Figures 12A and B and 13A ). Sensillus 125–136 µm long, setiform, finely barbed at distal half ( Figures 9H and 12A ). Lamellar and sublamellar lines well developed. Dorsosejugal porose area small, oval, located posterolaterad of seta in ( Figure 13A ).

Notogaster. Notogaster widened posteriorly, dorsosejugal furrow interrupted medially. Pteromorph with elongate oval ridges ( Figures 9F and 12 ). Notogastral setae vestigial, their alveoli clearly discernable. Porose area Aa nearly round or slightly oval (in male more oval); A 1 and A 2 joined together, forming a large irregular oval porose area; A 3 oval; median pore present, consisting of three to five small pores ( Figures 9G , 12 , and 13). Lyrifissures ia, im, ih, ip, ips and opisthonotal gland opening well developed ( Figures 12A and 13C ).

Gnathosoma . Subcapitulum longer than wide, with few microtubercles; hypostomal setae a, m and h 16–21 µm long, smooth ( Figure 12C ). Palp typical for family, all setae except on tarsus finely barbed, formula of setation: 0-2-1-3-10 including solenidion ω on tarsus ( Figure 13B ). Chelicera same as in Allogalumna dentirostrata sp. nov., with few heavily sclerotized blunt teeth on fixed and movable digits; setae cha and chb long, barbed; Trägårdh’ s organ well developed, its proximal part clearly discernable.

Epimeral region. With small granules and few microtubercles; apodemes apo.1, apo.2, apo.sj, apo.3, circumpedal carina and discidium well developed. Only four pairs of barbed epimeral setae of 22–25 µm length observed, setal formula: 1-0-2-1 ( Figure 12C ).

Ano-genital region. Anal aperture 111 µm long, 139 µm wide; genital aperture 78 µm long, 94 µm wide for holotype. All genital and aggenital setae well developed, thin, smooth; genital setae 20–26 µm long, aggenital seta 19–24 µm long; anal and adanal setae barbed, 16–20 µm long; adanal lyrifissure situated in paranal position, at level anterior to seta ad 3 ( Figure 12C and D ). Postanal porose area large, nearly round in shape ( Figure 13C ).

Legs. Structure and setation of legs typical for family as shown in the description of first species. Formula of setation, including famulus: I (1-4-3-4-20), II (1-4-3-4-15), III (1-2-1-3-15), IV (1-2-2-3-12), formula of solenidia I (1-2-2), II (1-1-2), III (1-1-0), IV (0-1-0).

Material examined

Holotype (female): Noor, Mazandaran province, Northern Iran, 36°47 ʹ, 51°26 ʹ E, 17 m b.s.l., 11 April 2004, Coll. M. A. Akrami; five paratypes (females): same data as holotype; one paratype (male): Nowshahr, Mazandaran province, Northern Iran, 36° 39 ʹ N, 51°30 ʹ E, 19 m a.s.l., 17 July 2003, Coll. M. A. Akrami. The holotype and paratypes are deposited in the collection of the Department of Plant Protection , College of Agriculture, Shiraz University, Iran.

Remarks

Pergalumna iunctiporosa sp. nov. is characterized among the known species of Pergalumna by the notogastral porose areas A 1 and A 2 joined together forming a large irregular oval porose area; setiform sensillus with fine barbs at distal half; rostrum with small triangular central carina and minute lateral carina of subtriangular shape, and barbed epimeral, anal and adanal setae.

Among the known species of Pergalumna , Pergalumna capillaris Aoki, 1961 , Pergalumna clericata (Berlese, 1914) , Pergalumna frater Balogh, 1960 , Pergalumna intermedia Aoki, 1963 , Pergalumna longisetosa Balogh, 1960 , Pergalumna myrmophila (Berlese, 1915) , Pergalumna nuda Balogh, 1960 and Pergalumna pterinervis (Canestrini, 1898) , resemble the new species in the structure of setiform sensillus. However, all these species are with separate porose areas A 1 and A 2, without median pore on notogaster, with oval porose area Aa, and without rostral carina, in which they clearly differ from the new species. Only the African species, P. nuda has round porose area Aa as in new species, but the former is different from the latter in the minute rostral, lamellar and interlamellar setae; smooth sensillus; well-developed dorsosejugal furrow, and much smaller size of notogastral porose areas.

Etymology

The specific epithet “ iunctiporosa ” refers to the notogastral porose areas A 1 and A 2, which joined together.

Ecology

This species is an inhabitant of the moss, litter under trees and forest soil.

Figures

Figure 9. Morphological characters of different species. (A–D) Galumna granulimorpha sp. nov. (A) Rostrum (arrow indicates central carina); (B) lateral view of sensillus; (C) pteromorph; (D) porose areas A3 and Ap. (E–H) Pergalumna iunctiporosa sp. nov. (E) Rostrum (arrow indicates central carina); (F) pteromorph; (G) porose areas, lyrifussure and opisthonotal gland opening; (H) dorsolateral view of sensillus.

Figure 12. Pergalumna iunctiporosa sp. nov. (A) Dorsal view of idiosoma; (B) ventral view of idiosoma; (C) anal plates.

Figure 13. Pergalumna iunctiporosa sp. nov. (A) Dorsofrontal view of prodorsum, partial; (B) palp, left, antiaxial view; (C) posterodorsal view of notogaster, partial.