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Thu, 28 Apr 2016 in Journal of Entomological and Acarological Research
Morphometry of Adults and Larval Stages of Cicadatra Persica (Cicadidae: Hemiptera) Distributed in Erneh, Syria
Abstract
This study was conducted in order to describe and measure the morphological characters of adults and larval stages of the cicada Cicadatra persica distributed in Erneh, Syria. Eggs, newly hatched nymphs, fully developed nymphs, exuviae and adults were described and measured. The mean lengths of eggs (1.9±0.1 mm) were the same as newly hatched nymphs (1.8±0.174 mm), whereas the mean length of the fully developed nymphs (3.1±0.185 cm) was longer than the adults. Several parts of adults’ body (males and females) were measured. The results show that the mean of females bodies (2.60±0.118 cm) were larger than males ones (2.45±0.192 cm), nevertheless, there were no significant differences between them.
Main Text
Introduction
Little is known about the species Cicadatra persica Kirkaldy 1909, which is distributed in Middle East countries and surrounding areas. C. persica was reported for the first time in Macedonia and its song was recorded and analyzed (Gogala & Trilar, 1998, 2003). Kartal & Zeybekoğlu (1996) described the internal and external structure of the reproductive system of its adults.
Researches on C. persica distribution in Syria are limited. The only researches conducted on this species were by Dardar et al. (2012, 2013a, 2013b), Dardar and Belal (2013) emphasizing the morphological differences among egg nests and adult individuals of C. persica. In this study, pictures are given for adults, larval stages and eggs of C. persica and some morphological characters are measured.
Materials and methods
Collecting individuals
Adults and larval stages of C. persica were collected from apple fruit orchards in the village Erneh that is located in Al-Sheikh Mountain in the south west of Syria.
The eggs were collected by cutting the twigs that hold egg nests from apple fruit orchards.
The newly hatched nymphs were collected by using the traps described by Dardar et al. (2012) and fixed in an ethanol and glycerin solution to maintain body soft to aid the study with a stereomicroscope.
The fully developed nymphs were collected by digging in the soil during adults’ emergence period. Adults were collected by hand and with emergence traps described by Dardar et al. (2012) from the orchards at sunset and sunrise times, when the insects are collected in larger numbers.
Morphometric study
Morphological characters of adults and larval stages identified by Moulds (2005) were studied by using a stereomicroscope (Olympus SZ61, optical lens: 10X, body lens: 2X).
The length of body of adults (n=11 males, n=11 females) and fully development nymphs (n=8) was measured in cm by a ruler; 34 and 30 morphological characters of males (n=11) and females (n=11) of C. persica were measured.
The length of different parts of body of adults was measured with the stereomicroscope with a magnification of 0.67. The length of the body and different parts of the body of the newly hatched nymphs (n=6) was also measured with a magnification of 4.5.
The real length of different part of the body was measured in mm.
Statistical analysis
Means and standard deviations were calculated for the length of different parts of adults’ body and larval stages using SPSS software (IBM Corp., Armonk, NY, USA).
Two independent samples t-test were carried out for the length of some morphological characters in order to compare males and females of C. persica.
Results and discussion
Morphometric study
The eggs
The color of the newly laid eggs is white (Figure 1) when newly laid and then it changes gradually into black light yellow (Figure 2), dark yellow, light rosy, and completely rosy (Figure 3) before hatching.
The mean length of the egg of C. persica was 0.1±1.9 mm (n=6).
The newly hatched nymph
The body of the nymph is rosy. The head is conical and ends with a long rostrum. Ocelli are absent; there are two pairs of eyes and antennas on the both lateral sides of the head (Figure 4). It has sucking mouthparts. The pronotum is well developed and longer than mesonotum and metanotum in order to support the fore legs to dig in the soil. The wing pads are absent.
The sixth pairs of legs are transparent. The fore femur is large and has a vertical spine on the lateral side of the leg. In this age, we cannot distinguish between the genital organs of males and females. Each antenna consists of 7 transparent segments (Figure 5).
The lengths of 24 morphological characters for newly hatched nymphs (n=6) of C. persica were measured (Table 1).
The fully development nymph
The color of the body is brown (Figure 6). The head is triangular and held two pairs of eyes and antennas. Each antenna consists of 7 segments. The ocelli are absent. It has sucking mouthparts. Mesonotum is larger than pronotum and hold fore wing pads. The metanotum is small and hold the hind wing pads (Figure 7). There are six pairs of legs, and the fore legs hold 3 spines that are different in size on the lateral side of the leg (Figure 8). The abdomen consists of 8 segments end with the genital organ.
The mean length of the body’s nymph was 3.1±0.185 cm (n=8).
The adult
The adult emerges from the final stage of nymph by molting that takes about 30-40 min. The newly emerged adult is soft and dull. It remains quit at rest without any movement on her exuvia, and takes her natural color and her wings begin to harden gradually (Figure 9). Then it flies and leaves its exuvia (Figure 10) on the soil surface, trunks, or weeds.
The body of adult is black; the head is triangular and hold two pair of compound eyes, 3 ocelli and one pair of antennae. Each antenna consists of 5 segments (Figure 11). It has sucking mouthparts. The wings are membranous with black veins and orange color at the base. The abdomen consists of 8 segments end with the genital organ.
The male
Thirty-four morphological characters for males (n=11) of C. persica were measured (Table 2).
The female
Thirty morphological characters for females (n=11) of C. persica were measured (Table 3).
Conclusions
There was no significant differences in the body length, wingspan, or pronotum between males and females of C. cicadatra (P=0.279, P=0.148, P=0.251). However, the results show that there were significant differences in the width of head’s capsulate and length of the third tibia (P=0.001, P=0.001); the mean width of head’s capsulate of the male was bigger than female’s one, while the mean length of the third tibia of the male was bigger than female’s one.
Abstract
Main Text
Introduction
Materials and methods
Collecting individuals
Morphometric study
Statistical analysis
Results and discussion
Morphometric study
The eggs
The newly hatched nymph
The fully development nymph
The adult
The male
The female
Conclusions