Research Article |
Corresponding author: Germán Chávez ( vampflack@yahoo.com ) Academic editor: Franco Andreone
© 2016 Germán Chávez, Alessandro Catenazzi.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Chávez G, Catenazzi A (2016) A new species of frog of the genus Pristimantis from Tingo María National Park, Huánuco Department, central Peru (Anura, Craugastoridae). ZooKeys 610: 113-130. https://doi.org/10.3897/zookeys.610.8507
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A new species of Craugastoridae frog encountered from 1000–1700 m in elevation in the premontane forests of the Peruvian central Andes is described. The new species is similar in appearance to many other species of Pristimantis, but is easily distinguishable from these species by having bright red coloration on the groin, posterior surface of thighs, and shanks. The new species is only known for two localities 27 km apart in the Huánuco Region.
Describimos una nueva especie de rana de la familia Craugastoridae de los bosques premontanos de los Andes centrales peruanos, los especímenes fueron encontrados entre los 1000 – 1700 metros de elevación. Esta especie es similar en apariencia a muchas especies de Pristimantis, sin embargo es facilmente distinguible por tener ingles, superficie posterior de los muslos y de la tibia rojo brillante. La nueva especie es conocida solo de dos localidades en la Región Huánuco, ambas separadas por alrededor de 27 km.
Amphibian, Andes, Craugastoridae , premontane forests, taxonomy
Anfibio, bosques premontanos, Craugastoridae , Andes, taxonomía
Frogs of the genus Pristimantis (Craugastoridae) comprise one of the most striking, richest, and understudied groups in the Neotropics (
Although several species of Craugastoridae have been described from the eastern Andean slopes of central Peru over the last 15 years (
Tingo María National Park (TMNP) is a small protected area covering 4777 ha (
Format for diagnosis and description of the new species follow those of
Fingers and toes are numbered preaxially to postaxially from I–IV and I–V respectively. We determined comparative lengths of toes III and V by adpressing both toes against Toe IV; lengths of fingers I and II were determined by adpressing the fingers against each other. Specimens were sexed based on external sexual characteristics (e.g., presence of vocal sacs in males), all specimens were collected when they were calling, thus are considered adult males. Photographs were taken in the field and laboratory by GC, and used for descriptions of coloration in life and in preserved condition respectively. In addition to the type series of the new species, specimens examined are listed in Appendix I.
The advertisement calls of a chorus of males (
Genetic distances were estimated to confirm generic placement of the new species within Pristimantis through analysis of the non-coding 16S rRNA mitochondrial fragment. Tissues from two paratopotypes,
Map of Peru indicating the type locality of Pristimantis pulchridormientes sp. n. (asterisk), the two most closely related species according to analysis of genetic distances, P. pluvialis and Pristimantis sp. (white square; see text for analysis), and of other Peruvian species of Pristimantis with red shanks or thighs: P. buccinator (black square), P. cajamarcensis (black star), P. ceuthospilus and P. rhodoplichus (white circle), P. coronatus (triangle), P. corrugatus (black circle).
Paratopotypes. Seven adult males (Fig.
Paratype. Adult male,
The new species is distinguished by the following combination of characters: (1) skin on dorsum finely shagreen, that on venter areolate, discoidal fold absent, dorsolateral folds absent; (2) tympanic membrane and tympanic annulus distinct, weak supratympanic fold covering dorsal and posterior edges of tympanum, horizontal diameter of eye 3x the diameter of tympanum; (3) snout acuminate in dorsal view, truncated and posteroventrally inclined in lateral view, canthus rostralis weakly concave in dorsal view, angular in lateral view, loreal region concave, rostral papilla absent; (4) upper eyelid lacking tubercles, cranial crests absent; (5) dentigerous process of vomers absent; (6) males with vocal sacs and vocal slits, nuptial excrescences absent; (7) finger I and finger II of equal length, fingers II and III bearing rounded discs about 1.5 times wider than digits, finger IV bearing a rounded disc about twice as wide as its digit; (8) fingers with narrow lateral fringes; (9) antebrachial tubercle absent; (10) ulnar and tarsal tubercles absent (11) inner metatarsal tubercle oval twice as long as round outer metatarsal tubercle, low supernumerary plantar tubercles at the base of toes I, II, and III; (12) toes with narrow lateral fringes, webbing absent, toe V longer than toe III; (13) in life, males with dorsum creamy yellow or yellowish brown with dark blotches; canthal stripe creamy white extending to the orbits; throat yellow; belly creamy white; groins, posterior surfaces of thighs, and shanks bright red; iris cream with brown flecks; (14) SVL in adult males 19.1–21.9 mm; SVL in females unknown.
Pristimantis pulchridormientes sp. n. is morphologically similar to P. acuminatus, P. bromeliaceus, P. enigmaticus, P. lacrimosus, P. limoncochensis, P. mendax, P. olivaceus, P. omeviridis, P. padiali, P. pardalinus, P. pluvialis, P. pseudoacuminatus, P. rhodostichus, P. schultei, and P. tantanti in having the head and body slightly compressed dorso–ventrally, but differs from all of them by having bright red coloration on groins, and on the posterior surfaces of thighs and shanks. Furthermore, P. pulchridormientes lacks a rostral papilla, which is present in P. acuminatus, P. bromeliaceus,P. lacrimosus (variable), P. olivaceus, P. omeviridis, P. pardalinus, P. pluvialis, P. rhodostichus, and P. schultei. Other species further differ by the following characters: P. enigmaticus has a tarsal fold (absent) and is lacking vocal slits (present); P. limoncochensis has a smooth dorsum (finely shagreen), and is lacking vocal slits (present), and a differentiated tympanic annulus and membrane (tympanic annulus and membrane distinct); P. mendax has a sigmoid inner tarsal fold (absent) and dorsal skin shagreen with scattered spicules (finely shagreen without spicules); P. padiali has an evident supratympanic fold (weakly evident), small dentigerous processes of vomers (absent), tubercles on ulnar and tarsal region (absent) and lacks vocal slits (present); P. tantanti has small dentigerous processes of vomers (absent), elongated ulnar tubercles (absent) and lacks tympanic annulus and membrane (present) and vocal slits (present).
Only eight other species of Peruvian Pristimantis have red coloration on groins and posterior surfaces of thighs: Pristimantis buccinator, P. cajamarcencis, P. ceuthospilus, P. coronatus, P. corrugatus, P. lythrodes, P. rhodoplichus and P. sagittulus. Pristimantis pulchridormientes can be differentiated from these species by having skin on dorsum finely shagreen (shagreen with pustules in P. cajamarcencis; shagreen with dermal ridges in P. coronatus; shagreen to finely corrugated in P. lythrodes; coarsely shagreen in P. rhodoplichus; shagreen with low tubercles in P. sagittulus), skin on venter areolate (smooth in P. buccinator), snout acuminate in dorsal view (rounded in P. cajamarcencis; subacuminate in P. lythrodes and P. rhodoplichus; acutely rounded in P. sagittulus), truncated and posteroventrally inclined in lateral view (acutely rounded in P. ceuthospilus; rounded in P. coronatus and P. lythrodes; acuminate in P. sagittulus), upper eyelids lacking tubercles (bearing small rounded tubercles in P. rhodoplichus, conical tubercles in P. coronatus and P. corrugatus), tympanic annulus not prominent (prominent in P. buccinator, P. ceuthospilus, P. rhodoplichus, P. sagittulus; absent in P. coronatus), supratympanic stripe absent (present in P. cajamarcencis), fingers I and II of equal lengths (finger I longer than finger II in P. buccinator; finger I shorter than finger II in P. ceuthospilus, P. lythrodes and P. rhodoplichus), ulnar tubercles absent (distinct conical ulnar tubercles in P. corrugatus), heels lacking tubercles (bearing small subconical tubercles in P. rhodoplichus and prominent conical tubercles in P. corrugatus and P. sagittulus).
The uncorrected genetic distances (Table
The new species is also similar to the recently described Pristimantis ardyae (Reyes–Puig et al. 2013) from Ecuador in having red groins (red or orange in P. ardyae), but can be distinguished by the following characters (condition for P. ardyae in parentheses): upper eyelid lacking tubercles (bearing two small rounded tubercles), low ulnar tubercles present (absent), and iris cream with brown flecks (orange with fine black reticulations).
An adult male (
(in millimeters).SVL = 21.9; HL = 8.5; HW = 8.5; ED = 2.7; EN = 2.5; TD = 0.5; IOD = 3.1; EW = 1.8; IND = 1.9; TL = 10.8; FL = 9.2; HL/SVL = 0.3; HW/SVL = 0.3; EW/IOD = 0.5; TL/SVL = 0.4; FL/SVL = 0.4; FL/TL = 0.8.
At night, dorsum, flanks, and dorsal surface of limbs are yellowish-brown with diagonal brown blotches and tiny brown flecks; dorsal surface of head of the same color and bearing a fine creamy yellow canthal stripe which extends to the medial portion of the upper eyelids. Throat yellow, chest and belly are creamy-white with tiny dark flecks; ventral surface of hands, and exterior portion of the ventral surface of foots yellowish-brown; groins, posterior surface of thighs, posterior surface of shanks, and inner portion of the ventral surface of hands bright red. Anterior surface of thighs are pinkish-gray with irregular red blotches. Iris golden with fine dark flecks. In daytime, yellowish-brown coloration turns into pale yellow.
As described above, but yellowish-brown coloration turns creamy-yellow with tiny dark flecks on dorsum, limbs and ventral surfaces of hands and feet; red coloration turned pinkish-white, and venter creamy-yellow; iris gray.
A chorus of several males (
Measurements and proportions of the specimens examined are given in Table
Measurements and morphological proportions of Pristimantis pulchridormientes sp. n. Range is followed by mean value and standard deviation in parenthesis (n = 9 adult males).
Snout-vent length (SVL) | 19.1–21.9 (20.5 ± 0.8) |
Head length (HL) | 7.0–8.5 (7.8 ± 0.5) |
Head width (HW) | 7.2–8.5 (7.8 ± 0.5) |
Upper-eyelid width (EW) | 1.8–1.9 (1.8 ± 0.1) |
Interorbital distance (IOD) | 2.2–3.1 (2.8 ± 0.3) |
Eye diameter (ED) | 2.3–2.7 (2.6 ± 0.1) |
Eye-nostril distance (EN) | 2.2–2.5 (2.3 ± 0.1) |
Internarial distance (IND) | 1.6–1.9 (1.7 ± 0.1) |
Tibia length (TL) | 9.6–10.8 (10.3 ± 0.4) |
Foot length (FL) | 7.7 – 9.2 (8.3 ± 0.5) |
HL/SVL | 0.3–0.4 (0.3 ± 0.1) |
HW/SVL | 0.3–0.4 (0.3 ± 0.1) |
FL/SVL | 0.3–0.4 (0.3 ± 0.1) |
EN/SVL | 0.1 (0.1 ± 0.0) |
FL/TL | 0.7–0.8 (0.8 ± 0.0) |
EW/IOD | 0.5–0.8 (0.6 ± 0.0) |
The name is composed of two words in Latin, “pulcher” which means beautiful, and “dormientes” = sleeping, in reference to the chain of mountains located within Tingo María National Park, above the city of Tingo Maria, locally known as Sleeping Beauty (Bella Durmiente), because it looks like a sleeping reclined woman (Figure
Pristimantis pulchridormientes is known from two localities (Fig.
The new species is not assigned to any taxonomic group despite the presence of morphological characters (i.e. head and body dorsoventrally compressed; skin on dorsum finely shagreen and that on venter areolate) suggesting a possible inclusion in the Pristimantis lacrimosus group. Group assignment is currently avoided because of the unclear taxonomic status of the P. lacrimosus group, as shown by recent phylogenetic studies (
The analysis of genetic distances (uncorrected p-distances) shows that Pristimantis pulchridormientes sp. n. is closely related to both P. pluvialis and an undescribed species (Pristimantis sp.) from southeastern Peru (Table
Uncorrected p-distances of the mitochondrial 16S rRNA gene. Comparisons between P. pulchridormientes and the three taxa with lowest p-distances are indicated in bold.
P. acuminatus (MC11555) | P. boulengeri (MAV257) | P. bromeliaceus (KU291702) | P. cf. mendax (MTD45080) | P. dorsopictus (MHUAA7638) | P. galdi (QCAZ32368) | P. mindo (MZUTI1382) | P. mindo (MZUTI1756) | P. moro (AJC1753) | P. moro (AJC1860) | P. omeviridis (QCAZ19664) | P. pluvialis (CORBIDI11862) | P. pluvialis (CORBIDI16695) |
P. pulchridormientes ( |
P. pulchridormientes ( |
P. ridens (AJC1778) |
P. sp. ( |
P. sp. (ROM43978) | P. subsigillatus (MECN10117) | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
P. acuminatus (MC11555) | 0.00 | ||||||||||||||||||
P. boulengeri (MAV257) | 0.05 | 0.00 | |||||||||||||||||
P. bromeliaceus (KU291702) | 0.14 | 0.13 | 0.00 | ||||||||||||||||
P. cf. mendax (MTD45080) | 0.14 | 0.13 | 0.00 | 0.00 | |||||||||||||||
P. dorsopictus (MHUAA7638) | 0.15 | 0.13 | 0.11 | 0.11 | 0.00 | ||||||||||||||
P. galdi (QCAZ32368) | 0.11 | 0.11 | 0.10 | 0.10 | 0.08 | 0.00 | |||||||||||||
P. mindo (MZUTI1382) | 0.12 | 0.11 | 0.09 | 0.09 | 0.08 | 0.06 | 0.00 | ||||||||||||
P. mindo (MZUTI1756) | 0.12 | 0.12 | 0.09 | 0.09 | 0.08 | 0.06 | 0.00 | 0.00 | |||||||||||
P. moro (AJC1753) | 0.11 | 0.10 | 0.09 | 0.10 | 0.09 | 0.09 | 0.08 | 0.07 | 0.00 | ||||||||||
P. moro (AJC1860) | 0.11 | 0.10 | 0.09 | 0.09 | 0.09 | 0.09 | 0.07 | 0.07 | 0.05 | 0.00 | |||||||||
P. omeviridis (QCAZ19664) | 0.14 | 0.13 | 0.12 | 0.12 | 0.12 | 0.11 | 0.12 | 0.11 | 0.10 | 0.10 | 0.00 | ||||||||
P. pluvialis (CORBIDI11862) | 0.14 | 0.14 | 0.11 | 0.11 | 0.11 | 0.11 | 0.09 | 0.09 | 0.11 | 0.09 | 0.13 | 0.00 | |||||||
P. pluvialis (CORBIDI16695) | 0.14 | 0.14 | 0.11 | 0.11 | 0.11 | 0.11 | 0.09 | 0.09 | 0.11 | 0.09 | 0.13 | 0.00 | 0.00 | ||||||
P. pulchridormientes ( |
0.18 | 0.17 | 0.13 | 0.12 | 0.13 | 0.12 | 0.11 | 0.10 | 0.10 | 0.10 | 0.14 | 0.07 | 0.07 | 0.00 | |||||
P. pulchridormientes ( |
0.18 | 0.17 | 0.13 | 0.12 | 0.13 | 0.12 | 0.11 | 0.10 | 0.10 | 0.10 | 0.14 | 0.07 | 0.07 | 0.00 | 0.00 | ||||
P. ridens (AJC1778) | 0.15 | 0.13 | 0.14 | 0.14 | 0.13 | 0.16 | 0.13 | 0.13 | 0.14 | 0.13 | 0.15 | 0.15 | 0.15 | 0.16 | 0.16 | 0.00 | |||
P. sp. ( |
0.14 | 0.14 | 0.11 | 0.11 | 0.10 | 0.09 | 0.08 | 0.08 | 0.10 | 0.08 | 0.12 | 0.06 | 0.06 | 0.07 | 0.07 | 0.15 | 0.00 | ||
P. sp. (ROM43978) | 0.14 | 0.13 | 0.12 | 0.12 | 0.11 | 0.10 | 0.09 | 0.08 | 0.10 | 0.10 | 0.13 | 0.07 | 0.07 | 0.08 | 0.08 | 0.17 | 0.06 | 0.00 | |
P. subsigillatus (MECN10117) | 0.13 | 0.13 | 0.11 | 0.11 | 0.09 | 0.10 | 0.05 | 0.05 | 0.09 | 0.09 | 0.12 | 0.10 | 0.10 | 0.12 | 0.12 | 0.15 | 0.09 | 0.09 | 0.00 |
At both localities the new species was found in arboreal microhabitats, frequently calling perched on leaves 2 m above the ground. The only other species sharing a similar microhabitat and presumably ecological niche (also nocturnal) was P. aff. mendax, but this frog was not found in sympatry with P. pulchridormientes, because its altitudinal range of 100–900 m asl does not overlap with the range of P. pulchridormientes from 1095–1700 m asl.
With only two known localities, it is difficult to predict the potential distribution range of this species. Although the type locality had a large population and was located inside a protected area, the locality where paratype
We thank J. C. Chaparro and an anonymous reviewer for their comments and suggestions on an earlier version of the manuscript. Furthermore, we are indebted to C. Sanchez Rojas, J. Blas and R. Tamashiro and the Servicio Nacional de Areas Naturales Protegidas (SERNANP) in Tingo María for logistic support in the field. Work within Tingo Maria National Park was made possible through the “Convenio específico de cooperación interinstitucional entre el Servicio Nacional de Areas Naturales Protegidas por el Estado y la Empresa de Generación Huallaga S.A.” Call recordings were made with equipment donated by the Cornell Lab of Ornithology. GC thanks D. Vásquez for field assistance. Finally, we thank E. Carrillo Mena, F. Vivanco Villa and A. Alarcón Mays and the staff of Tingo Maria National Park for their support and companionship in the field.
Pristimantis acuminatus.– PERU: Amazonas: Provincia Condorcanqui:
Pristimantis bromeliaceus.– PERU: Amazonas: Provincia Bagua:
Pristimantis buccinator.– PERU: Cusco: Provincia La Convención:
Pristimantis cajamarcencis.– PERU: Cajamarca: Provincia San Ignacio:
Pristimantis ceuthospilus.– PERU: Piura: Provincia Huancabamba:
Pristimantis corrugatus.– PERU: Amazonas: Provincia Chachapoyas:
Pristimantis lacrimosus.– PERU: Loreto: Provincia Requena:
Pristimantis mendax.– PERU: Cusco: Provincia La Convención:
Pristimantis olivaceus.– PERU: Cusco: Provincia La Convencion:
Pristimantis rhodoplichus.– PERU: Piura: Provincia Ayabaca:
Pristimantis rhodostichus.– PERU: Loreto: Provincia Datem del Marañon:
Pristimantis schultei.– PERU: Amazonas: Provincia Luya:
GenBank accession numbers for the taxa and genes sampled in this study. 1Pristimantis sp. (ROM 43978) is treated herein as Pristimantis sp. following
Taxon | Voucher Nbr. | 16S |
---|---|---|
Pristimantis acuminatus | MC 11555 | DQ195448 |
Pristimantis bromeliaceus | KU 291702 | EF493351 |
Pristimantis boulengeri | MAV 257 | DQ195452 |
Pristimantis cf. mendax | MTD45080 | EU186659 |
Pristimantis dorsopictus | MHUAA 7638 | KP082874 |
Pristimantis galdi |
|
EU186670 |
Pristimantis mindo | MZUTI 1382 | KF801584 |
Pristimantis mindo | MZUTI 1756 | KF801581 |
Pristimantis moro | AJC 1860 | JN991454 |
Pristimantis moro | AJC 1753 | JN991453 |
Pristimantis omeviridis | QCAZ19664 | EU130579 |
Pristimantis pluvialis |
|
KX155577 |
Pristimantis pluvialis |
|
KX155578 |
Pristimantis pulchridormientes sp. n. |
|
KX664106 |
Pristimantis pulchridormientes sp. n. |
|
KX664107 |
Pristimantis ridens | AJC 1778 | KR863320 |
Pristimantis sp. 1 |
|
KX155579 |
Pristimantis sp. 2 | ROM 43978 | EU186678 |
Pristimantis subsigillatus |
|
KF801580 |