John D. Lynch

John D. Lynch
National University of Colombia | UNAL · Instituto de Ciencias Naturales - ICN (Bogotá)

PhD

About

186
Publications
96,432
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5,161
Citations
Citations since 2017
8 Research Items
1677 Citations
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
Education
January 1965 - December 1969
University of Kansas
Field of study
  • Zoology
January 1964 - January 1965
January 1960 - January 1964

Publications

Publications (186)
Article
Full-text available
We performed free sampling by visual encounter survey in order to document the biodiversity of amphibians and reptiles along an altitudinal transect that covered the Andean forest, foothills and lowlands of the cordillera Oriental, between the departments of Huila and Caqueta. In the transect, 50 species of amphibians and 42 species of reptiles wer...
Article
Full-text available
We reassessed the taxonomic status of the species in the Atractus collaris complex (A. alphonsehogei, A. collaris, A. limitaneus, and A. gaigeae) on the basis of congruence between quantitative and qualitative morphological characters (meristic, morphometric, color pattern, hemipenis, and scale microdematoglyphics) along its wide geographical distr...
Chapter
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The herpetofauna of the Chiribiquete National Natural Park, a huge natural and cultural monument in the northwestern Amazonia of Colombia, has been one of the largest myths regarding the biodiversity of the country, and a biogeographic unknown. Despite the databases referring to the subject, and the specimens hosted by national biological collectio...
Article
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We describe a new species of the genus Ninia from the Chocó-Magdalena biogeographic province, which was previously reported as a distinct population of N. maculataor as N. atratafrom the western slopes of the Cordillera Occidental of Colombia.The new species is similar to N. atrata ,N. celata, N. espinali, N. franciscoi, and N. maculata. It shares...
Article
Full-text available
The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & Nemésio 2007; Donegan 2008, 2009; Nemésio 2009a–b; Dubois 2009; Gentile & Snell 2009; Minelli 2009;...
Data
This plot is not part of the published stance but derives from it. The plot shows the number of authors by geographic region (courtesy of Dr. Diego Astua).
Article
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We redescribe Atractus punctiventris based on the examination of its holotype, two topotypes, and two additional specimens recently collected. We describe two new species of Atractus with 15 dorsal scale rows, previously confused with Atractus insipidus, from the eastern and western portions of Brazilian Amazonia, respectively. The new species are...
Article
Full-text available
Monocultures of the African oil palm (Elaeis guineensis Jacq.) were studied between 2006 and 2013 so as to determine which species of snakes frequented them and to estimate the abundances of each species encountered. Thirty five species of snakes (three boas, one coral, 27 colubrids, one tropidophid, one typhlopid, and two vipers) were captured wit...
Article
Full-text available
Monocultures of the African oil palm (Elaeis guineensis Jacq.) were studied between 2006 and 2013 so as to determine which species of snakes frequented them and to estimate the abundances of each species encountered. Thirty five species of snakes (three boas, one coral, 27 colubrids, one tropidophid, one typhlopid, and two vipers) were captured wit...
Book
Full-text available
This document presents a diagnosis of the current status of the different species that ranges in Colombian, as well as the programmatic strategies and action lines that must be implemented in the country which define actions, goals and activities to be developed by Universities, Research Institutes that are part of the National Environmental System...
Book
Full-text available
En este documento se presenta un diagnóstico sobre la situación actual de las diferentes especies de serpientes presentes en el territorio colombiano, así como las estrategias programáticas y las líneas acción que se deben poner en marcha en el país, definiendo acciones, metas y actividades a desarrollar con la participación de los investigado...
Article
Full-text available
Este estudio presenta la revisión actualizada de la riqueza, composición y distribución de los anfibios y reptiles del departamento del Casanare. Se revisaron 1.012 ejemplares depositados en las principales colecciones biológicas del país y se recolectaron 658 ejemplares en cuatro municipios de Casanare. Se obtuvo el registro de 46 especies de anfi...
Article
Full-text available
The present study is an updated revision of the richness, composition and distribution of amphibians and reptiles in Casanare. A total of 1,012 specimens from the main Colombian biological collections were examined and 658 specimens were collected in four Casanare municipalities. As a result, we reported 46 species of amphibians and 65 species of r...
Article
Full-text available
The New World direct-developing frogs (Terrarana) comprise more than 970 species distributed from the southern United States to northern Argentina. Although the composition of this clade has been remarkably stable for many decades, evidence for its monophyly is derived mostly from DNA sequences with putative phenotypic synapomorphies limited to the...
Article
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Anurans are ectothermic animals very sensitive to temperature, mainly during the embryonic stage. In addition, environmental temperature decreases with altitude, and the amphibian fauna changes. Therefore, we studied the relationship between the embryonic thermal tolerances of twelve species of anurans and the temperatures of their microhabitat alo...
Article
Full-text available
The snake fauna of Colombia excedes 270 species of which 30 are coral snakes and 19 are vipers. Snakes of Colombia are distributed in nearly all of the country except the waters of the Caribbean and in high mountains (above 3500 meters). These animals are crucial to ecosystem funcioning but suffer much from human activities. Five threats to Colombi...
Article
Full-text available
The hylid frog fauna of the Colombian lowlands east of the Andes consists of 72 or 73 species (one identified only tentatively), comprising about 40% of all frog species of that region and 10% of the total frog fauna known for the country. Most lowland hylids reproduce in lentic waters and few species reproduce in sluggish streams, treeholes, and b...
Article
Full-text available
We revised the taxonomic status of Atractus species occurring in the eastern slopes of Central Cordillera, Magdalena Valley, and west slopes of Eastern Cordillera of Colombia on the basis of morphological characters (meristics, morphometrics, color patterns, and hemipenes). A lectotype is designated for Atractus obtusirostris. Additional specimens...
Article
Full-text available
The taxonomic status of the Pacific lowland Atractus is revised on the basis of meristic, morphometric, colour pattern, and hemipenial characters. Geographical variation is reported for six Atractus species (A. boulengerii, A. clarki, A. iridescens, A. melas, A. multicinctus, and A. paucidens). Atractus boulengerii is rediscovered and redescribed f...
Article
Full-text available
The taxonomic status of the Pacific lowland Atractus is revised on the basis of meristic, morphometric, colour pattern, and hemipenial characters. Geographical variation is reported for six Atractus species (A. boulengerii, A. clarki, A. iridescens, A. melas, A. multicinctus, and A. paucidens). Atractus boulengerii is rediscovered and redescribed f...
Article
Full-text available
Three new species of Atractus are described from the northern Cordillera Central of Colombia. The new species, previously confused with older names, are easily distinguished from any currently recognized Atractus by unique combinations of morphological characters. Additionally, we provide comments on the Atractus diversity and distribution pattern...
Article
Full-text available
The Colombian amphibian fauna is among the richest known in the world, with about 20 species of salamanders (order Caudata), 35 of the limbless caecilians (order Gymnophiona), and more than 700 species of frogs and toads (order Anura) recorded from localities within the country. The potential effects of exposure to glyphosate on amphibians arising...
Data
FIGURE 15. Dorsal (A) and ventral views (B) of head and lateral view of body (C) of Atractus multicinctus (ICN 7075). Scale = 5 mm.
Data
FIGURE 17. Dorsal (A) and ventral (B) views of the holotype of Atractus typhon sp. nov. (ICN 10901). SVL 293 mm, CL 79 mm.
Data
FIGURE 9. Sulcate and asulcate sides of the hemipenis of (A) Atractus iridescens (ICN 10902), (B) detailed view of lateral expansion of the hemipenis of Atractus iridesnces, (C) sulcate and asulcate sides of the hemipenis of Atractus typhon sp. nov. (ICN 10901). Scale = 5 mm.
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FIGURE 4. Sulcate and asulcate sides of the hemipenis of (A) Atractus clarki (ICN 10826) and (B) Atractus multicinctus (ICN 7075). Scale = 5 mm.
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FIGURE 13. General view of original Sordelli’s plate of the Atractus multicinctus. Modified from Jan & Sordelli (1865).
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FIGURE 18. Dorsal (A) and lateral (B) views of head and lateral view of body (C) of the holotype of Atractus typhon sp. nov. (ICN 10901). Scale = 10 mm.
Data
FIGURE 5. Dorsal (A) and ventral (B) views of the holotype of Atractus echidna sp. nov. (UV-C 7718). SVL 201 mm, CL 47 mm.
Data
FIGURE 10. Dorsal (A) and ventral (B) views of the holotype of Atractus medusa sp. nov. (IAvH 2981). SVL 325 mm, CL 60 mm.
Article
Full-text available
Four species of Oxyrhopus occur in Colombia, one (O. leucomelas) of which is Andean and the other three occur in lowlands. No geographic variation was detected in O. occipitalis but there is marked geographic variation in color pattern and scutellation for the widely distributed O. petola. Recognition of subspecies within O. petola is possible but...
Article
Full-text available
The taxonomic status of Atractus sanctaemartae and A. nebularis is revised on the basis of quantitative and qualitative analyses of morphological characters (meristics, morphometrics, colour pattern and hemipenis). Characters used previously for diagnosing Atractus nebularis from A. sanctaemartae are demystified, and the synonymy of these species i...
Article
Full-text available
The taxonomic status ofAtractus sanctaemartae and A. nebularis is revised on the basis of quantitative and qualitativeanalyses of morphological characters (meristics, morphometrics, colour pattern and hemipenis). Characters used previously for diagnosing Atractus nebularis from A. sanctaemartae are demystified, and the synonymy of these species is...
Article
Hemiphractid frogs of the genus Cryptobatrachus are nearly exclusive to Colombia and are distributed over an altitudinal range between 360 and 2400 meters on the three cordilleras and the massif of the Sierra Nevada de Santa Marta. To the three species currently recognized, three additional species are named (C. conditus, C. pedroruizi, and C. ruth...
Article
Full-text available
In the following work we examine the richness and altitudinal distribution of Colombian Andean anurans trying to emphasize patterns of distribution. We also supply an updated checklist of Andean anurans in Colombia. At present, Colombian harbors about 396 Andean frogs: 153 species in the Cordillera Occidental, 187 species in the Cordillera Central,...
Article
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With the objective of studying the amphibian fauna in the Cerro Murrucucú (PNN Paramillo, Tierralta, Córdoba), we sampled amphibians in the zone during the months of December of 2004, January and February of 2005 in different localities; using two sampling strategies (visual encounter surveys and pitfall tramps). In first instance, we compare the r...
Article
Full-text available
Wiens (2007, Q. Rev. Biol. 82, 55–56) recently published a severe critique of Frost et al.'s (2006, Bull. Am. Mus. Nat. Hist. 297, 1–370) monographic study of amphibian systematics, concluding that it is “a disaster” and recommending that readers “simply ignore this study”. Beyond the hyperbole, Wiens raised four general objections that he regarded...
Data
FIGURE 1. Distributional records for frogs of the genus Cryptobatrachus. Thin lines define the 1000 meter contour. C. boulengeri (triangles), C. conditus (half-filled circle), C. fuhrmanni (solid circles are specimens examined, open symbol is a literature record), C. nicefori (hexagon), C. pedroruizi (diamonds), C. ruthveni (inverted triangle), and...
Data
FIGURE 7. Diagrams (see legend for Fig. 5) of size of tympanum (expressed as proportion of tympanum length / eye length) in males of the northern (large ears) populations of Cryptobatrachus. First three diagrams are for population systems # 12 – 14 (C. boulengeri), next three are for Cryptobatrachus sp (population system # 15), C. pedroruizi (popul...
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FIGURE 9. Diagrams (see legend for Fig. 5) of size of tympanum (expressed as proportion of tympanum length / eye length) in females of Cryptobatrachus.
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FIGURE 16. Feet in plantar view of (A) Cryptobatrachus ruthveni (ICN 35257) and (B) C. nicefori (MLS 138). Scales equal 2 mm.
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FIGURE 19. Plot of number of embryos / young against number of pits on the dorsum of females carrying clutches. Squares (C. boulengeri), open circles (C. fuhrmanni), solid circles (C. pedroruizi) and triangle (C. ruthveni).
Data
FIGURE 6. Diagrams (see legend for Fig. 5) of snout length (expressed as the proportion of E-N length / eye length) in females of Cryptobatrachus. The diagrams, from top to bottom, are for population systems # 12 – 15, 11, 10, 9, and 1 – 8, respectively).
Data
FIGURE 8. Diagrams (see legend for Fig. 5) of size of tympanum (expressed as proportion of tympanum length / eye length) in males of eight populations of Cryptobatrachus fuhrmanni (uppermost is population system # 1, lowest is population system # 8, in numeric order). The range of values for the large-eared Cryptobatrachus (see Fig. 7) is given usi...
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FIGURE 21. Cryptobatrachus boulengeri (top, left, ICN 34663, adult male 38.4 mm SVL; bottom, left, ICN 34678, juvenile female, 53.8 mm SVL) and Cryptobatrachus conditus (top, right, ICN 33572, holotype; bottom, right, ICN 33573, adult male 38.2 mm SVL).
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FIGURE 11. Thigh thickness in three species of Cryptobatrachus: triangles = C. boulengeri (inverted for adult males, not inverted for adult females), circles = C. fuhrmanni (solid for adult males, open for adult females), square = C. nicefori holotype male, + = juvenile male and x = juvenile female C. boulengeri.
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FIGURE 12. Crania in dorsal view of Cryptobatrachus boulengeri (ICN 38918) and C. fuhrmanni (ICN 34652). Scale equals 5 mm.
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FIGURE 18. Details of osteology of palate in Cryptobatrachus boulengeri (ICN 38918). Scales equal 2 mm.
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FIGURE 22. Cryptobatrachus fuhrmanni (top: brooding females [left ICN 47710, 64.9 mm SVL; right, not preserved. Each from population system # 5]; bottom left [gravid female, ICN 47461, 71.6 mm SVL, population system # 4] bottom right [unpreserved specimen from population system # 5]).
Data
FIGURE 2. Individual snout-vent lengths of adults of Cryptobatrachus fuhrmanni from population system # 5 (Samaná) plotted against altitude of the collection illustrating the effect of altitude on SVL of adults. Open circles are for males, closed circles are for females.
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FIGURE 3. Plot of mean sizes of adults of Cryptobatrachus fuhrmanni (triangles for mean male size, circle for mean female size) against mean altitude of the population system sample. Open symbols are means for a heterogeneous population system (see Fig. 2).
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FIGURE 4. Sexual dimorphism in ear size in Cryptobatrachus. Upper figures are adult males, lower figures are adult females. Column at left is for C. conditus (A [ICN 33572], B [ICN 33583]) and column to right is C. fuhrmanni (C [ICN 53439], D [ICN 534446]). Scales equal 5 mm.
Data
FIGURE 5. Diagrams (horizontal line records range, vertical line the mean, dividing a shallow box described by the mean ± 2 standard errors of the mean [approximating the 95 % confidence intervals]) of snout length (expressed as the proportion of E-N length / eye length) in males of Cryptobatrachus. The diagrams, from top to bottom, are for populat...
Data
FIGURE 10. Skin texture (distribution of enlarged tubercles and folds) of Cryptobatrachus. (A) C. pedroruizi (ICN 38720) and (B) C. ruthveni (ICN 7151). Scale equals 2 mm.
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FIGURE 13. Hands in palmar view of (A) Cryptobatrachus pedroruizi (ICN 38697) and (B) C. nicefori (MLS 138). Scales equal 2 mm.
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FIGURE 14. Subarticular adhesive pads on distal subarticular tubercles of outer fingers of Cryptobatrachus fuhrmanni (ICN 14835, scale equals 2 mm).
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FIGURE 17. Palates of Cryptobatrachus. (A) C. boulengeri, ICN 47407; (B) C. fuhrmanni, ICN 4272; (C) C. nicefori, MLS 138. Scale equals 2 mm.
Data
FIGURE 20. Plot of number of embryos / young against SVL in Cryptobatrachus fuhrmanni using data from the IAvH and ICN collections.
Article
Full-text available
A new species of the genus Eleutherodactylus (Leptodactylidae) is described from a cloud forest in western Departamento del Cauca, in Munchique National Park, sector La Romelia, between 2550 and 2750 m., and E. hectus is verified for the region.
Article
Full-text available
The Villavicencio Region, at the base of the eastern mountain range, harbors an amphibian fauna consisting of three caecilians, 45 frogs, and one salamander. This fauna includes 16 abundant species of frogs and toads that occupy open habitats and which do not invade forested areas of these lowlands. An additional 24 species require moist conditions...
Article
Full-text available
Oscaecilia polyzona is reported from two additional localities in the Middle Magdalena. Data are provided for 13 additional specimens and call into question the use of certain characters as means of distinguishing species. Oscaecilia polyzona is an abundant species in poorly drained shaded soils in eastern Caldas.
Article
Full-text available
The amphibian fauna proper of Colombian páramos consists of only 39 species although a number of additional species has been reported as páramo species. These excluded taxa are more properly considered as species of the Andean forests that occur as well in the páramo-ized regions after the forests are cut. The compositon of the páramo fauna is nota...
Article
Four amphibian species were found on an isolated páramo (3300-3600 m) in the central part of the Cordillera Occidental of Colombia. The single salamander species is proposed as a new species of the Bolitoglossa palmata group, and the two Eleutherodactylus species are described as new. One of these appears to be a member of the E. leptolophus group....