Eupholidoptera astyla (Ramme, 1927)

Willemse, Luc, Tilmans, Jos, Kotitsa, Nefeli, Trichas, Apostolos, Heller, Klaus-Gerhard, Chobanov, Dragan & Ode, Baudewijn, 2023, A review of Eupholidoptera (Orthoptera, Tettigoniidae) from Crete, Gavdos, Gavdopoula, and Andikithira, ZooKeys 1151, pp. 67-158 : 67

publication ID

https://dx.doi.org/10.3897/zookeys.1151.97514

publication LSID

lsid:zoobank.org:pub:5FEDE55D-C9AF-47D5-9125-9F1758AE2A18

persistent identifier

https://treatment.plazi.org/id/A68D7726-DAAD-531A-A150-9B7841DAF3DF

treatment provided by

ZooKeys by Pensoft

scientific name

Eupholidoptera astyla (Ramme, 1927)
status

 

Eupholidoptera astyla (Ramme, 1927) View in CoL View at ENA

Figs 10 View Figures 8–10 , 19 View Figures 11–24 , 33 View Figures 25–38 , 47 View Figures 39–52 , 61 View Figures 53–66 , 77 View Figures 69–82 , 91 View Figures 83–96 , 105 View Figures 97–110 , 120 View Figures 111–125 , 134 View Figures 126–139 , 148 View Figures 140–153 , 162 View Figures 154–167 , 176 View Figures 168–181 , 191 View Figures 182–197 , 192 View Figures 182–197 , 207 View Figures 198–212 , 213 View Figures 213–215 , 224 View Figures 224–235 , 225 View Figures 224–235 , 241 View Figures 240–246 , 254 View Figures 254, 255 , 256 View Figure 256 , 259 View Figure 259

Pholidoptera astyla Ramme 1927: 133.

Eupholidoptera astyla (Ramme, 1927); Ramme 1951: 198.

Eupholidoptera astyla Morphological description. Ramme 1927: 133; 1939: 100; Harz 1969: 377.

Eupholidoptera astyla Bioacoustics. Çiplak et al. 2009: 27, 54-55.

Examined specimens.

1 ♂ (paratype); 81 ♂, 59 ♀ (for details see Suppl. material 2).

Diagnostic features.

Frontal part of head (Fig. 19 View Figures 11–24 ) pale with black dots; frontal half of pronotal disc (Fig. 33 View Figures 25–38 ) with more or less extensive black patch, border with pale rear half transverse or V-shaped. Male (Fig. 241 View Figures 240–246 ) - stridulatory file with 101-105 teeth (including proximal and distal ones), density of teeth in middle two thirds of the file 22-24 teeth per mm; anal tergite (Figs 77 View Figures 69–82 , 91 View Figures 83–96 , 105 View Figures 97–110 ) with hind margin toward middle forming two small pointed teeth separated by a short narrow V-shaped excision, tips pointing downwards; cerci (Figs 120 View Figures 111–125 , 134 View Figures 126–139 ) unarmed, 5-7 × longer than wide, weakly conical, weakly curved inward in basal half, in profile straight; subgenital plate (Figs 148 View Figures 140–153 , 162 View Figures 154–167 ) wider than long, widest halfway, sides rimmed, in profile upturned, tip apical lobes narrowly truncate, spineless, at inner side emarginate with V-shaped excision along one fifth of length; styli (Fig. 176 View Figures 168–181 ) minute, circular, inserted ventrally, proximal of tip of apical lobe, pointing inward to downward; titillator (Figs 191 View Figures 182–197 , 207 View Figures 198–212 ) asymmetrical, apical arms widening from base, halfway splitting into two strongly thickened, flattened and wrinkled arms, forming wide to almost straight angle ending into two very strong curved spine-like teeth, pointing left or right.

Redescription of female.

In 1927 E. astyla was described based on a single male from Naxos and three females and the male abdomen from Crete ( Ramme 1927). According to Willemse and Heller (2001) the presence of E. astyla on Naxos is doubtful. An extensive search on Naxos in June 2019 by the first author only revealed E. smyrnensis at midlevel altitudes in the north-eastern part of the island but no other Eupholidoptera species. Willemse and Heller (2001) indicated that the E. astyla females listed in the original description ( Ramme 1927: 134) from Ierapetra, Anatoli, and Kato Chorio could in fact belong to E. mariannae which they described in their paper from this area. In 2001 female E. mariannae were not known and this assumption could neither be confirmed nor denied. Based on the discovery of male and female E. mariannae in neighbouring locations near Kavousi and Kalavros, opportunity has been taken to re-examine paratypes used by Ramme (1927) in his description of E. astyla and compare them with female E. astyla and E. mariannae described in this paper. Unfortunately, the female from “Jerapetra” could not be located in the MfNB. Comparison of the subgenital plates (Figs 214 View Figures 213–215 , 215 View Figures 213–215 ) revealed that females from Kato Chorio and Anadoli resemble female E. mariannae from Kalavros and Kavousi rather than E. astyla . This implies that Ramme based his description of female E. astyla on female E. mariannae . Consequently female E. astyla has still not been described and is redescribed here based on specimens from Rethimno and Iraklion.

Description.

Female.

Examined specimens.

11 ♀: RETHIMNO: Idhi Mt., Idhaio Andro -1987.041.02 (CT); Idhi Mt., Ski-centre - 1987.046.03 (CT); Nea Kria Vrisi, 2 km NW - 2000.016.04 (CT); IRAKLION: Ano Viannos, 3 km SE - 1995.024.03 (CT), RMNH.5014909 (RMNH), RMNH.5086970 (RMNH), RMNH 5086971 (RMNH); Krotos, 0.5 km N - RMNH.INS1141820 (RMNH); Marathos - RMNH.5086989 (RMNH); Mournia, 3 km SW - 2001.008.04 (CT); Tsoutsouros, 6 km NNW - 1995.014.03 (CT). For more details see Suppl. material 2.

General appearance (Figs 224 View Figures 224–235 , 225 View Figures 224–235 ) and colouration as male. First abdominal segment dorsally black, laterally lighter; remaining segments dorsally yellowish brown, sides lighter coloured, last segment completely black. Elytra in dorsal view covered by pronotum, in profile barely protruding, light coloured. Cercus short, conical tapering, more so in apical third toward a pointed tip, straight to slightly upturned in profile, straight to slightly curved inward in dorsal view, covered with pale short and long hairs. Subgenital plate (Figs 47 View Figures 39–52 , 61 View Figures 53–66 ) oblong, greatest width halfway or in distal quarter, in ventral view convex, proximally flattened to slight depressed, halfway on side with or without a (in-)distinct bulge, surface shiny, smooth with dispersed hairs, hind margin converging gradually from halfway or more abruptly in distal quarter, with medial V-shaped excision along one third of length, corners rectangular to sharp-angled, in profile triangular to trapezoid with a more or less distinct dorsal depression, lower edge straight distally slightly upturned, tip obtuse angular. Ovipositor almost straight to slightly upcurved, 1.5-2.0 × longer than pronotum.

Measurements.

See Tables 6 View Table 6 , 7 View Table 7 .

Bioacoustics.

Based upon the sound recordings of two specimens (20 syllables measured), the song of E. astyla , as in all species of Eupholidoptera , consists of isolated syllables produced in long series with the opening hemisyllable much shorter and weaker than the closing hemisyllable. In E. astyla , the syllable duration is ~ 120 ms, with a syllable rate up to ~ 1/s. Published records ( Çiplak et al. 2009) show a syllable duration of ~ 166 ms at 25 °C and a syllable repetition rate of less than 1/s. The song may most likely be confused with the other species of Eupholidoptera in Crete, except E. smyrnensis and E. forcipata . For details of sound recordings of Eupholidoptera astyla see Suppl. material 3.

Variation.

High altitude specimens are smaller than specimens found at lower altitudes. Variation in black and pale colour patterns seem linked to individuals rather than to populations. Cercus more or less slender and more or less bent inward. Medial excision anal tergite V- to U-shaped, adjoining teeth aligned with dorsal surface pointing distally or bent downward, pointing downward. Subgenital plate more or less compact, in profile, lower margin evenly rounded or with an angle halfway. Styli minute to small, in the west and north pointing inward, toward the south and east pointing downward, exceptionally also outward. In some males from Asterousia Mt. (central-south Crete), styli were lacking almost completely. Titillator can be more or less compact, apical arms parallel or slightly divergent, apical teeth gradually or suddenly and more strongly pointed, pointing right or left. Two males (of 34) collected in pitfall traps near Kofinas along the south coast showed an almost symmetrical titillator, the two apical arms pointing in opposite directions (Fig. 192 View Figures 182–197 ). In other characters these two males fully matched E. astyla , as did all other males from Kofinas. The symmetrical titillators are considered individual anomalies. The shape of the female subgenital plate varies: in the west and at higher altitudes on Mts. Idi and Dikti being plump with a short median excision, toward the east changing to oblong more distinctly acutely bilobed with a deeper excision, resembling those of E. feri and E. mariannae .

Differential diagnosis.

Males differ from congenerics in the strongly asymmetrical, thickened and wrinkled apical arms of the titillator (Figs 191 View Figures 182–197 , 207 View Figures 198–212 ) pointing left or right, in the narrow V-shaped excision in the anal tergite (Figs 77 View Figures 69–82 , 91 View Figures 83–96 , 105 View Figures 97–110 ) with tips pointing downward, in the slender, unarmed weakly inward curved cerci (Figs 120 View Figures 111–125 , 134 View Figures 126–139 ), in the wide, upturned, spineless subgenital plate (Figs 148 View Figures 140–153 , 162 View Figures 154–167 ) and in the minute, pre-apically inserted styli pointing downward (Fig. 176 View Figures 168–181 ). Females differ in the oblong subgenital plate (Figs 47 View Figures 39–52 , 61 View Figures 53–66 ), proximally convex with a short excision. In the southeast toward Lasithi female subgenital plates are longer, the apical lobes on both sides of the medial excision more pointed, resembling E. mariannae . In colouration, particularly the anterior half of the pronotum E. astyla resembles E. annamariae , E. feri , E. giuliae , and E. mariannae . For more details differentiating E. astyla from other Cretan Eupholidoptera see Table 5 View Table 5 .

Distribution.

From the Cretan species of Eupholidoptera , E. astyla has the widest range. Current data indicate its range covers large parts of central Crete, stretching from central and eastern Rethimno to western Lasithi, from Skaleta east of the city of Rethimno in the northwest to Ierapetra along the southern coast in the southeast (Fig. 254 View Figures 254, 255 ). Despite the additional localities presented here, the exact boundaries in the west, where it meets E. giuliae , and in the east, where it meets E. mariannae and E. feri , are not clear. Current information suggests E. astyla to be absent from large parts of the central lowlands south of Iraklion and the northern coastal region east of Iraklion but this certainly requires additional investigation. Opportunity was taken to examine (and photograph) the male mentioned by Ramme (1927) in his description of E. astyla of which only the last part of the abdomen was left. Based on the shape of the titillator (Fig. 213 View Figures 213–215 ) this male clearly belongs to E. astyla . The label of this male only states “Jerapetra”. It is not clear whether the name “Jerapetra” actually refers to the town Ierapetra or the district. Either way, assuming the label is correct, the presence in Ierapetra indicates there is an area west of Ierapetra where both E. astyla and E. mariannae may occur together (Fig. 254 View Figures 254, 255 ). For a complete list of localities, specimens and repositories see Suppl. material 1.

Habitat.

The species habitats cover a wide altitudinal range: from sea level along the northern and southern coast to 1550-1800 m on Mt. Idi and Mt. Dikti. Pitfall traps that caught E. astyla were placed in sparse to dense phrygana, maquis and areas dominated by pine trees.

Phenology.

Hand catches indicate adults can be found from early May onward at lower altitudes up to the end of August at higher altitudes. Pitfall trap catches indicate that especially at higher altitudes the species can be found at least up to the second half of September or even early October.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Orthoptera

Family

Tettigoniidae

Genus

Eupholidoptera

Loc

Eupholidoptera astyla (Ramme, 1927)

Willemse, Luc, Tilmans, Jos, Kotitsa, Nefeli, Trichas, Apostolos, Heller, Klaus-Gerhard, Chobanov, Dragan & Ode, Baudewijn 2023
2023
Loc

Pholidoptera astyla

Ramme 1927
1927