Data is being studied and analyzed by Nancy Collins.
Laurel Symes is conducting DNA analaysis. .
The 3 species on the top half of this page were collected by N. Collins in 2010. Three undetermined species at the bottom half of this page were collected by Dr. E. Van den Berghe in Nicaragua.
There are two males singing on this page - 1 varicornis group male and 1 rileyi group male.
The varicornis group male makes one short trill; in the other clip he makes a continous trill.
The rileyi group male makes slow long bursts of chirps
If you have any data, photos or recordings of these species that were found in Nicaragua in January 2010, please contact me at: email@example.com
To be determined species from Nicaragua: MY current feeling is that this varicornis group specimens are Oecanthus marcosensis (described by Charles Fuller Baker in 1905) - but then later deemed a synonym in 1932. An investigation is underway to possibly raise it back to full species status. UPDATE: Analysis of 3 DNA sequences could not
separate this species from O. varicornis. Despite their vastly
different physical appearance, further study will be needed to
definitively declare this as a separate species: O. marcosensis
Varicornis group males sing at night on low vegetation.
(PLACEHOLDER -- Constant trilling)
This waveform is from a recording made of the male in the above photos while singing at night. The temperature was estimated to be 72 - 80 degrees F or (23 - 27 C). The pulse rate on this waveform is 80 pulses per second.
Domitila Reserve in Nicaragua - a varicornis group male.
Note the orange on the head and joints -- and pale antennae.
Frontal view of the base of the antennae.
Note the black spot on the 'knee' joint and the black slash marks on the femur.
Note the female to the left of the male behind the leaf. You can see her 3 right-sided limbs and her ovipositor.
This recording is of short bursts often heard in early evening. Only after dark did the song become more continuous (although trilling was never as long-lasting as species in the nigricornis group.)
This young nymph was found within 2 feet of the above adult male. The pattern on the top surface of the abdomen matches varicornis.
Below is a rileyi group species. This male was found 3 feet above ground singing from a well-exposed hibiscus-type shrub alongside a well-traveled path at a resort complex. Note the golden head.
Nica.sp.h -- the current suspicion is that this may be Oecanthus allardi (currently known only from the West Indies). We are awaiting collection of a specimen of O. allardi from the West Indies for DNA comparison. UPDATE: Specimens of O. allardi have been collected. They will undergo DNA analysis for comparison to the sequences of these Nicaraguan rileyi group specimens.
Here is a close-up view of the antennal markings: Black ovals on white backgrounds on the 1st and 2d segments.
This rileyi group male was found at Domitila Private Wildlife Reserve.
(Relatively slow chirping - especially considering the temperature was 75 - 80 degrees)
Below are waveforms of three species: Snowy, Alexander's and the male found in Nicaragua on hibiscus. The top waveforms are a series of chirps; the bottom waveforms are the number of pulses in a single chirp. One can see the differences in the number of pulses with each chirp for these three species.
Nica.sp.h The top waveform shows 15 seconds of chirping; the bottom shows a single burst/chirp
O. fultoni (Snowy tree cricket) waveforms -- Top 10 seconds of chirping; Bottom 3 chirps
O. alexanderi (Alexander's tree cricket ) 14 seconds of chirping then 1 burst/chirp
This niveus group female was found under a huge Guasimos tree -- she is possibly Oecanthus leptogrammus.
Note the whitish background and black marking on the antennal segment.
Another view of the whitish background and black mark on the 1st antennal segment.
The specimens below were collected in NE Nicaragua by Dr. Eric Van Den Berghe, San Marcos, Nicaragua. Preliminary DNA analysis indicates these are possibly new species. Additional collecting and recording of singing males will take place in 2013 to compare them to other known species without current DNA analysis for comparison.
All four species collected by Dr. Van den Berghe.
These genus Neoxabea males have an X pattern on the tegmina. (Nicaragua species X)
These genus Neoxabea males have a <> pattern on the tegmina. (Nicaragua species <>)
This genus Oecanthus species have very long, slender legs. They might be O. leptogrammus. Preliminary DNA analysis separates them from the species in the nigricornis, rileyi, varicornis and niveus groups that have been sequenced by L. Symes.
Photo of presumed O. leptogrammus.
Antennal markings of presumed O. leptogrammus.
This species is very narrow-winged and has an overall yellowish color with bright orange head and pronotum. Hopefully, additional specimens will be collected and recorded in 2013. (Nicaragua species 4)
Overall yellowish with bright orange head and pronotum. Small and slender. DNA sequencing shows it to be distinct from other species sequenced by L. Symes.
Female of the yellowish with orange head tree cricket.
Antennal markings of yellowish with orange head tree cricket from Nicaragua.
This Neoxabea male has an X pattern on the tegmina.
The X female is pale has 4 dark blotches.
Antennal markings for the X species from Nicaragua.
The < > male is smaller with narrower wings.
The <. > female is dark overall and has 2 main blotches.
Antennal markings of the < > tree cricket from Nicaragua.