Mesogastrura ojcoviensis ( Stach, 1919 )

Chang, Gyu-Dong, Kim, Sun-Sook & Park, Kyung-Hwa, 2022, One new species and one new record for the genus Mesogastrura (Collembola, Hypogastruridae) from Korean caves, with DNA barcodes, Zootaxa 5222 (4), pp. 325-342 : 333-339

publication ID	https://doi.org/ 10.11646/zootaxa.5222.4.2
publication LSID	lsid:zoobank.org:pub:09A2C0BC-4765-436B-889E-3A6EE958C895
DOI	https://doi.org/10.5281/zenodo.7473649
persistent identifier	https://treatment.plazi.org/id/8A7987B7-9F15-7B4F-B1E4-93E74D1497A0
treatment provided by	Plazi
scientific name	Mesogastrura ojcoviensis ( Stach, 1919 )
status

Treatment

Mesogastrura ojcoviensis ( Stach, 1919) View in CoL

( Figs 3c View FIGURE 3 , 5b View FIGURE 5 , 8b–f View FIGURE 8 )

(Korean name: du-nun-gul-bo-ra-tok-to-gi)

Mesachorutes ojcoviensis Stach, 1919

Mesogastrura anthrohungarica Loksa, 1959 View in CoL

Type locality. Jerzmanowska cave (guano piles), Kraków, Poland .

Collecting site. Jangamgul cave (N 37° 23′ 54.0′′, E 128° 25′ 23.0′′), Jujin-ri , Pyeongchang-gun, Gangwon-do, Korea GoogleMaps ; Manjanggul cave (3 rd entrance, vertical) (N 33° 30′ 40.0′′, E 126° 45′ 1.0′′), Deokcheon-ri , Gujwaeum , Jejusi, Jeju-do Island, Korea GoogleMaps .

Material examined. Jangamgul cave : 20 specimens on slides, 8.xii.2018, collected from guano piles at approximately 50m deep from the main entrance, leg. GD Chang, SA Beak , TK Lee; Manjanggul cave: 20 specimens on slides, 25.vi.2019, from guano piles at approximately 70 m deep from the third entrance, leg. YG Choi, GD Chang, JW Kim, SS Kim.

Additional material. Jangamgul cave : 75 specimens were in 95 % alcohol vials; Manjanggul cave: 34 specimens were in 95 % alcohol vials .

Material deposition. Specimens are housed in the National Institute of Biological Resources, Incheon, Republic of Korea ( NIBR) and in the Insect Collection of the Biology Education Department, Jeonbuk National University, Jeonju, Korea ( JBNU) .

Ecology. This species was collected from bat guano piles which were in dark zone with varying temperature region (DZVT) on the first floor of Jangamgul cave ( Fig. 2b View FIGURE 2 ). The collecting sites of Jangamgul cave were usually wet during early summer season. However we collected this species in winter season with relatively low humidity, and guano was almost dry. This species was also found in guano piles of twilight zone ( Fig. 2d View FIGURE 2 ) near 3 rd entrance of Manjanggul cave which is vertical area ( Fig. 2c View FIGURE 2 ). The humidity and temperature of collecting site of Manjanggul cave were much higher than in Jangamgul cave.

Diagnosis. Body color totally white. Head with 2 + 2 eyes. AIIIO with normal shape of 2 guards and 2 inner sensilla. Empodium filament shape without tooth. Tibiotarsus with 2 knobbed tenent hairs.Abd. I–III with a 2 chaeta. Ventral tube with 4 + 4 laterodistal chaetae. Dens with 4 + 4 chaetae. Anal spines absent.

Descriptions of Korean specimens. Body length average about 1.0 mm. Antenna, head, thorax, and abdomen ratio as 1: 1.1: 1.7: 3. Body color entirely white including antenna, except for the ocular areas ( Fig. 3c View FIGURE 3 ). Anal spines absent. Antenna segments average ratio 1: 1: 1.3: 1.7. Ant. I with 7 chaetae. Ant. IV with 4–5 blunt sensilla in the tip of Ant. IV.

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Head with 2 + 2 eyes and 4 lobed simple shape PAO ( Fig. 5b View FIGURE 5 ). Labral chaetae typical shape as 5, 5, 4 (apical row of chaetae much stronger than other lines) with 4 prelabral chaetae. Maxillary outer lobe with terminal hair of palp (th), and 2 sublobal hairs and one basal chaeta (bs). Maxillary head shape as in Mesogastrura libyca ( Caroli, 1914) , with strong three toothed-like structure and 6 lamellae ( Fjellberg 1998; Fig. 26D). Labial palp shape as in M. seotalensis sp. nov. with five papillae (A–E). Mandible with 4 teeth and molar plate present. Unguis without inner tooth (rarely with 1), and with 2 chaetae on basal part.

Empodium chaetae-like shape ( Figs 8b–d View FIGURE 8 ). Tibiotarsi I–III with 19 (8 on the middle, 11 on the tip) ( Fig. 8b View FIGURE 8 ), 19 (8 on the middle, 11 on the tip) ( Fig. 8c View FIGURE 8 ), 18 (7 on the middle, 11 on the tip) chaetae ( Fig. 8d View FIGURE 8 ), respectively; 2 of them (A 1 and A 7) elongated, knobbed tenent hairs.

Ventral tube with 4 + 4 laterodistal chaetae ( Fig. 8e View FIGURE 8 ). Furca present; manubrium, dens, and mucro ratio as 1: 2: 2.5; dens with 4 + 4 chaetae ( Fig. 8f View FIGURE 8 ); mucro spear head-like shaped and without tooth.

Chaetotaxy. Head and body chaetotaxy similar to M. seotalensis sp. nov. (see Fig. 3a View FIGURE 3 & Table 2 View TABLE 2 ).

Distribution. Europe and South Korea.

Remarks. The South Korean specimens of this species are found to be in general agreement with the description of the European specimens given by Thibaud et al. (2004), Babenko et al. (1994) and Jordana et al. (1997).