Pergalumna ekaterinae, Páez & Villagomez & Palacios-Vargas, 2019

Páez, Jair, Villagomez, Fernando & Palacios-Vargas, Jóse G., 2019, Description of a new Pergalumna (Acari: Oribatida: Galumnidae) species from Mexico and its postembryonic development, Zootaxa 4647 (1), pp. 385-406: 387-391

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Pergalumna ekaterinae

sp. nov.

Pergalumna ekaterinae   sp. nov.

( Figs. 1–53 View FIGURES 1–4 View FIGURES 5–10 View FIGURES 11–12 View FIGURES 13–14 View FIGURES 15–18 View FIGURES 19–22 View FIGURES 23–30 View FIGURES 31–34 View FIGURES 35–38 View FIGURES 39–40 View FIGURES 41–42 View FIGURES 43–44 View FIGURES 45–46 View FIGURES 47–48 View FIGURES 49–50 View FIGURES 51–53 )

Description. (Measurements in μm, average values in parenthesis) (N=10, seven males and three females). Length of males 434–503 (466), width 345–434 (363); length of females 444–493 (477), width 365 (365). Color brown, slightly lighter in medial prodorsal lenticular region.

Diagnosis. Bothridial seta setiform unilaterally barbed, body ornamentation slightly punctuated, three striate bands visible in posterior region of notogaster, all prodorsal setae present, interlamellar seta longer than other prodorsal setae; all porose areas present, A1 and A2 near each other and sometimes slightly fused, notogaster with ten pairs of setae reduced to alveoli.

Prodorsum ( Figs.1, 3, 4 View FIGURES 1–4 ). Surface smooth, lenticular region present, covering almost the entire surface of rostrum, with a yellowish lighter color than the rest of body, lamellar lines L and S present, arched and parallel, dorsosejugal porose area Ad (L=8, W=32) ellipsoidal, near bothridium; prodorsal setae ( Fig. 5 View FIGURES 5–10 ) setiform and barbed. Interlamellar seta in (120) setiform and barbed, longer than other prodorsal setae, (except bothridial seta), lamellar seta le (72) intermediate sized and barbed, rostral seta ro (58) small and barbed; bothridial seta bs (172) setiform and unilaterally barbed. Chelicera (L=160, W=59) ( Fig. 7 View FIGURES 5–10 ) of normal shape, ornamented with punctuations in anterior region, seta cha (40) longer than chb (24), both barbed.

Notogaster ( Figs.1, 4 View FIGURES 1–4 ). Cerotegument dotted, with homogeneous ornamentation, three striate bands (s) present in posterior region, two of them near porose area A3, the other semicircular between them, better seen in caudal view ( Fig. 9 View FIGURES 5–10 ); ten pairs of notogastral setae reduced to alveoli, four pairs of notogastric porose areas present ( Fig. 6 View FIGURES 5–10 ), porose area Aa wider than long (L=18; W=56), oval; extra alveoli (lx) below Aa, anterolateral seta (la) near hinge of pteromorph, lateromedial seta (lm) located next to sagittal line, porose area A1 (L=16; W=25) and A2 (L=19; W=15) with irregular shape and diffuse border, resulting in seemingly fused porose areas; lyrifissure im above h 3. Seta h 2 posterior to A2, lyrifissures ih and ips lateral and above p 3, opisthonotal gland (gla) well developed, slightly protuberant near notogastral border, porose area A3 (L=15; W=28) posterior, surrounded by h 1, p 1 and p 2, lyrifissure ip above p 2, in some specimens ip located below and between p 1 and p 2.

Pteromorph bilobed ( Fig. 10 View FIGURES 5–10 ) (L=294, W= 180 in proximal, 162 in middle and 200 in distal region) with irregular ornamentation forming thin and thick lines, central notch present, lyrifissure ia and alveolus c in habitual position.

Ventral plate ( Fig. 2 View FIGURES 1–4 ). Cerotegument punctuated on whole plate. Subcapitulum ( Fig. 8 View FIGURES 5–10 ) (L=94; W=113) same ornamentation, seta h short (17); epimeral setation (1-0-2-1), setae 1a, 3a, 3b and 4a (8) present, one pair of aggenital setae (8) and three pairs of adanal setae (8) present, all short; lyrifissure iad above anal plate and below ad 3, without porose area postanalis ( Fig. 9 View FIGURES 5–10 ); genital plate with six setae inserted in 2–4 formula, with g 1 and g 2 (11) longer than g 3 –g 6 (6); anal plate with two pairs of small setae (8).

Legs ( Figs. 11–14 View FIGURES 11–12 View FIGURES 13–14 ). All legs heterotridactylous, with basal granulation in femora. Leg setation and solenidia from leg I–IV (solenidium in parenthesis). Femora 4-4-2-2; genua 3(1)-3(1)-1(1)-2; tibiae 4(2)-4(1)-3(1)-3(1); tarsi 20(2)-15(2)-15-12.

Leg I ( Fig. 11 View FIGURES 11–12 ). Femur L= 118 µm, genu L= 49 µm, tibia L= 69 µm, tarsus L= 108 µm. Solenidium σ (124) in- serted dorsally and pre-apically, φ1 (150) and φ2 (66) dorsal near apex, ω 1 (50) anterior to ft´´, ω 2 (78) posterior. Famulus (ε) short with blunt apex, situated between ω 1 and ft´´.

Leg II ( Fig. 12 View FIGURES 11–12 ). Femur L= 98µm, genu L= 39 µm, tibia L= 49 µm, tarsus L= 69 µm. Solenidium σ (90) apical, φ (73) pre-apical, ω 1 (20) anterior to ft´´, ω 2 (28) posterior, dorsally inserted.

Leg III ( Fig. 13 View FIGURES 13–14 ). Femur L= 69 µm, genu L= 29 µm, tibia L= 69 µm, tarsus L= 78 µm. Solenidium σ (67) apical, φ (38) pre-apical.

Leg IV ( Fig. 14 View FIGURES 13–14 ). Femur L= 88 µm, genu L= 39 µm, tibia L= 78 µm, tarsus L= 98 µm. Solenidium φ (104) dorsal, with a thickening in first quarter.

Type material. Holotype (male) mounted on slide. 20/03/2016, México, Veracruz, Estación de Biología Tropical, Los Tuxtlas, sample of soil and litter, L. Villagomez, col   . three males paratypes and four female paratypes on slides with same data (catalog number #1557)   . Five larvae, seven protonymphs, five deutonymphs and eight tritonymphs extracted from cultures and mounted on slides 14/05/2018 (#1558) and   20 more adult paratypes from the same locality with date 11/03/2017 (#1559) extracted from cultures are deposited in 75% ethanol   . This material is deposited in the collection of Collembola de México y Ácaros Edáficos of Laboratory of Ecology and systematic of Microarthropods , Faculty of Sciences , UNAM. Aditionally five males paratypes with data 20/03/2016, México, Veracruz, Estación de Biología Tropical , Los Tuxtlas, sample of soil and litter, L. Villagomez, col. is deposited in Colección Nacional de Ácaros ( CNAC), Instituto de Biología , UNAM. México, with catalog number CNAC 011248 to CNAC 011252.  

Etymology. This species is named in honor of Dr. Ekaterina A. Sidorchuk (Russian Academy of Sciences, Paleontological Institute) for her remarkable and enthusiastic contribution to the knowledge of fossil and living oribatid mites, she unfortunately lost her life in an accident. The epithet is a noun in genitive according to the International Code of Zoological Nomenclature article 31.1.2.


Universidad Nacional Autonoma de Mexico