Phaneroptera nana

Fieber, 1853

Mediterranean katydid, southern sickle bush-cricket

Phaneroptera nana is a small native to mainland Europe, the Near East, and North Africa. It has established in California (first recorded 1952), Oregon (since 2015), and South America, likely spreading via shipping. The inhabits sunny, dry environments with shrubs and low tree branches. are active primarily in summer and fall.

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Pronunciation

How to pronounce Phaneroptera nana: /fæˌnɛrəˈptɛrə ˈnænə/

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Identification

are 13–18 mm long with light green bodies and numerous small black spots. are bright orange. The pronotum is narrower than it is tall. Hindwings are longer than tegmina, with tegmina approximately three-fourths hindwing length. Adult males have prominent curved ; females possess a 5 mm sickle-shaped ovipositor. Some individuals show a brown stripe where tegmina meet, but this stripe does not extend onto the pronotum. Distinguished from P. falcata by male subgenital plate shape (tapered in P. nana versus two-lobed in P. falcata) and pronotum proportions (narrower than tall in P. nana versus roughly equal width and height in P. falcata).

Images

Habitat

Sunny and dry , especially shrubs and low branches of trees. Oviposition occurs in leaf lamina of both evergreen plants (Olea europaea, Citrus lemon, Viburnum tinus, Hedera helix) and deciduous plants (Prunus persica, Vitis vinifera, Castanea sativa).

Distribution

Native: mainland Europe, Near East, North Africa. : California (San Francisco Bay Area, Los Angeles Basin; present since at least 1952), Oregon (Portland, since 2015), South America. Also recorded from Azores islands (Corvo, Faial, Pico, São Miguel, Santa Maria).

Seasonality

active summer through fall. Fresh on evergreen plants found from June–July (when new adults appear) through September–November; on deciduous plants, oviposition occurs in summer in developed leaves. Eggs typically hatch in summertime. One per year.

Diet

Has been observed to cause damage in pear orchards by feeding on unripened pears. Recorded to consume pupae of Lobesia botrana (European grapevine moth).

Life Cycle

One per year. laying occurs in autumn in leaf lamina of plants. Eggs are inserted laterally into leaves. Development spans from autumn to autumn of the following year, with diapausing larvae and pupae in parasitized eggs.

Behavior

Females sing in response to male calls, prompting males to move toward them—unusual among katydids where typically females move toward stationary males. This reduces female exposure to . Males require a female response within 60 milliseconds to initiate approach, ensuring proximity. Females prefer longer chirps and require at least two male chirps before responding; additional chirps do not increase response likelihood.

Ecological Role

for multiple including Anastatus bifasciatus (Eupelmidae), Pseudoligosita phaneropterae (Trichogrammatidae), Aprostocetus brevifrangiatus (Eulophidae), Baryconus spp. (Scelionidae), and potentially Trichogramma evanescens (Trichogrammatidae) and Scelio sp. (Scelionidae). Serves as a key resource for parasitoid in Mediterranean .

Human Relevance

Agricultural pest in pear orchards. in California and Oregon with potential economic impact.

Similar Taxa

Phaneroptera falcataOverlapping range in Europe; distinguished by male subgenital plate shape (two-lobed versus tapered) and pronotum proportions (width roughly equal to height versus narrower than tall).
Phaneroptera subcarinataMorphologically similar Indo-Malayan ; previously classified under P. nana by some authors.