Montana striata (Kittary, 1849)

Sergeev, M. G. & Molodtsov, V. V., 2022, New data on distribution of Montana striata (Kittary, 1849) (Orthoptera: Tettigoniidae: Platycleidini) in the eastern part of the range, Far Eastern Entomologist 465, pp. 6-11 : 7-9

Montana striata (Kittary, 1849)

Montana striata: Zeuner, 1941: 15 ; Ramme, 1951: 259; Sergeev, 1986: 181; Childebaev

& Storozhenko, 2004: 217; Strorozhenko, 2004: 147–148; Massa & Fontana, 2011: 11;

Ivković et al., 2017: 535.

Decticus striatus: Kittary, 1849: 462 –464.

Chelidoptera striata: Kirby, 1906: 210

Metriptera moldavica: Uvarov, 1924: 530; Bey-Bienko, 1926: 200–201, 1927: 99.

Metrioptera striata: Kolossov, 1932: 117; Umnov, 1932: 23–25.

Platycleis (Montana) striata: Bey-Bienko, 1964: 230; Harz, 1969: 251, 254, 255; Ragge,

1990: 9.

MATERIAL. Russia: Novosibirks Region, SE West-Siberian Plain, Baraba steppe,

vicinities of Karachi (Ozero-Karachi) settelement, forb meadow outside small birch forest,

55 о 21′N, 76 о 58′E, 5.VII 1967, 1 ♀, 1 larva; Kazakhstan: Pavlodar Region , SE West-Siberian

Plain, Kulunda steppe, ~ 160 km NW Pavlodar, near Lesnoye settlement, roadside, 53 о 28′N,

75 о 54′E, 13.VII 1980, 1 ♀ (A.I. Lee); the same locality and habitat, VIII 1980, 1 ♀ (A.I. Lee) .

DISTRIBUTION. The species is recorded from SE Europe ( Serbia, Romania, Moldova,

Ukraine, S European Russia up to the Ural Mts.) (Vorontsovsky, 1911; Bey-Bienko, 1964;

Harz, 1969; Ivković et al., 2017, Hochkirch et al., 2016), the forest-steppes and steppes of N

Kazakhstan (Tarbinskij, 1925; Bey-Bienko, 1927; Childebaev & Storozhenko, 2004) and the southern part of W Siberia (Bey-Bienko, 1926, 1930; Nefedov & Miram, 1939; Sergeev,

1986, 1991). In the Asian part of its range, the species is known only from several localities

( Fig. 1 ).

its range.

ECOLOGICAL PREFERENCES

The species commonly prefers different variants of the dry meadows and steppes. BeyBienko (1970) found Montana striata in the Central Black Earth Nature Reserve. He collected this species in the meadow steppe and steppe habitats including some transformed plots with strictly controlled haymaking or grazing. The abundance of this species varied about 1–3/hour and the density was about 0.03–0.05/m 2. In the Troitsk Forest-Steppe Reserve,

Montana striata was found in different meadow and steppe habitats, but prefered the forb meadow (Nefedov & Miram, 1939). Its abundance varied between 0.4 and 3.05/hour. In the southern part of Omsk Region, the bush-cricket occurred in the forb meadows on the upper terraces of the Irtysh River valley (our unpublished data). It abundance was about 3–6/hour.

Besides, in the Pavlodar Region, this species was found along roadsides.

ECOLOGO-GEOGRAPGICAL MODEL OF DISTRIBUTION

Almost all known localities of Montana striata in the Asian part of its range are limited by the forest-steppes and the northern steppes (Sergeev, 2021). This distribution pattern fits ecological preferences of the species. However, Montana striata is distributed sporadically.

The ecologo-geographical model shows that, in Asia, the climatically suitable habitats for this bush-cricket are distributed over almost all territory of the forest steppes and the steppes from the Ural Mts. to the western parts of both the Baraba and Kulunda steppes ( Fig. 2 ).

Besides, the species may occur in the southern parts of the taiga life-zone, probably over local dry meadows.

The model performance is relatively good (taking into account a few samples), because the AUC value for 9 replicates equals 0.747. In this model, the solar radiation in January is the most important factor (contribution — 41.8%), the mean temperature of wettest quarter

(16.4), the annual precipitation (10.7), the solar radiation in April (10.5), and the precipitation of driest month (7.9) are also significant. Almost all factors are essential for development of eggs and nymphae.

of its range (all distribution data and bioclimatic variables for 1970–2000; point-wise mean for 9 replicates).

Figures

Fig. 1. Known localities and years of collecting of Montana striata in the Asian part of

Fig. 2. Predicted probabilities of suitable conditions for Montana striata in the Asian part