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We report herein the second locality of Synapturanus rabus Pyburn, 1977 in Peru, based on specimens collected at Reserva Forestal Santa Cruz, department of Loreto. In addition, a general description of the call is provided.
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Journal of species lists and distribution
Chec List
No te s o N GeoGraphic DistributioN
274
Check List 8(2): 274-275, 2012
© 2012 Check List and Authors
ISSN 1809-127X (available at www.checklist.org.br)
The microhylid genus Synapturanus Carvalho,
1954 currently includes three species distributed
across the Guiana region and Amazonia: Synapturanus
mirandaribeiroi Nelson and Lescure, 1975; S. rabus
Pyburn, 1977; and S. salseri Pyburn, 1975. Synapturanus
rabus is known to occur in Colombia, Ecuador, and Peru
(Pyburn 1977; Wild 1995; Gordo et al. 2006). In Peru it

Tëbu, in the headwaters of the River Gálvez, close to the
River Blanco, 05°51’30” S, 73°45’37” W, ca. 100-180 m,
department of Loreto) (Gordo et al. 2006). We are pleased
to report the second locality of Synapturanus rabus from
Peru.
During herpetological surveys at Reserva Forestal
       
department of Loreto, Peru (03°32’01” S, 73°10’30” W,
110 m), one individual of Synapturanus rabus
      
Amazonia Peruana, Peru; Figure 1-2) was collected on
Abstract: We report herein the second locality of Synapturanus rabus Pyburn, 1977 in Peru, based on specimens collected
at Reserva Forestal Santa Cruz, department of Loreto. In addition, a general description of the call is provided.
 

 
* Corresponding author. E-mail: lopezrojasjj@gmail.com
 1* and Diego F. Cisneros-Heredia 2
Synapturanus rabus Pyburn, 1977 in Peru (Amphibia: Anura:

Figure 1. Synapturanus rabus 
Forestal Santa Cruz, Loreto, Peru.
Figure 2. Synapturanus rabus 
left hand, ventral view; B: left foot, ventral view; C: head, dorsal view; D:
head, lateral view. Line = 2 mm.
C
B
D
A
275
López-Rojas et al. | Filling gap in the distribution of Synapturanus rabus in Peru
Figure 3. Similitary of oscilogram and audiospectrogram of six
advertismente calls of Synapturanus rabus of this paper (A) and by the
Read (2000).
20th     
beneath ground, and found after excavating approximately
0.2 m under the surface. The specimen has all the
diagnostic characteristics described by Pyburn (1977)
for the species, including: small body size (18.9 mm in
SVL), throat, dorsum, upper surfaces of limbs and sides of
head and body dark brown; pale cream line along canthus
rostralis; median, unpigmented notch at anterior end of
 
sharp (Figures 1 and 2).
The present record extends the known distribution of
Synapturanus rabus in western Amazonia to a point about
         
Tëbu, Gordo et al. 2006), 640 km southwestern of the type
locality (Pyburn 1977), and 470 km southeastern of the
closest Ecuadorian locality (Tiputini Biodiversity Station,
      

       
and Peruvian localities.
The call of Synapturanusrabusat Reserva Forestal Santa
Cruzwas recorded at 0.1 m on the surface from ground,
using a Canon PowerShot A610, each call were edited and
analysed with the software Praat v. 5.1.25, then compared
with the call presented by Read (2000) for the species.
Statistical analysis was carried out with Past v.1.34. Both
recordings showed similar characteristics (Figure 3), with
the call consisting of short pulsations regularly repeated
at intervals between 6.80 and 7.50 seconds (average ± SD,
7.16 ± 0.32 seconds, N=5), with repetitions between 8-16
notes per minute (average ± SD, 12.62 ± 3.89 seconds,

Each call occurred had note length between 0.08-0.09
(average ± SD, 0.09 ± 4-3 seconds, N=10, Figure 4), a single
pulse group of 29-48 pulses (mean= 39), and the number
of pulses per second varied between 32 and 46 (mean=
39). Activity calling is sporadic throughout night but
  
between 24.3-25.8 °C.
Figure 4. Oscilogram of a single advertisement call of Synapturanus
rabus, showing amplitude modulation.
Literature Cited
         
Reptiles; p. 191-196 In
      
and P.F. Fasabi-Rimachi (ed.). Rapid biological inventory 16: Peru:
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Pyburn, W.F. 1977. A new fossorial frog from the Colombian rain forest
Herpetologica 32(4): 367–370.
   Frogs of the Ecuadorian Amazon, A guide to their calls.
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Wild, E.R. 1995.New genus and species of Amazonian microhylid frog
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Acknowledgments: We are grateful to Devon Graham and Carol Terceira

     

: August 2011
: January 2012


... We tentatively assigned the name S. mirandaribeiroi to sampled populations distributed in Suriname, Southern French Guiana and Northern Amazonas state, Brazil, considering distribution and morphology. Synapturanus rabus was described based on samples from Vaupés, Colombia (Western Guiana Shield), but populations from Ecuador (Read, 2000;Ortiz, 2018) and Peru (Gordo et al., 2006;López-Rojas & Cisneros-Heredia, 2012;Gagliardi-Urrutia et al., 2015) have been assigned tentatively to this taxon. DNA sequences from a population located 150 km south of the type locality were assigned tentatively to this taxon. ...
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