Endemic Species of Guatemala

Guatemala has at least 22,000 identified species, while its best national endemism figures are reported by taxonomic group rather than as one compatible all-taxa total. More than 550 plant species are reported as exclusive to Guatemala, and the 2026 national herpetofauna treatment recognizes 57 country-endemic amphibians and 28 country-endemic reptiles. ^{[S1] [S2]}

Where Guatemala’s endemism concentrates

Guatemala’s national floristic synthesis identifies eight plant-endemism regions. These are floristic regions, not a universal set of hotspots for every animal group. Together they show how sharply the country changes from humid Caribbean-facing mountains and the Cuchumatanes to volcanic slopes and the dry eastern interior. ^[S5]

Micro-endemism is especially visible in salamanders. Bolitoglossa qeqom is known from an isolated cloud forest at Cerro Guachmalén, Alta Verapaz, at about 1,862 m; Amphibian Species of the World treats its natural occurrence as Guatemala-only. ^[S6] The same pattern appears in several other highland salamanders whose ranges are tied to single volcanoes, mountain blocks or cloud-forest systems.

Amphibian endemism is dominated by plethodontid salamanders

The 2026 USAC treatment recognizes 57 amphibian species endemic to Guatemala. Plethodontidae contributes 36 species, Craugastoridae 11 and Hylidae 10. This is strict country endemism; a separate 75 amphibian species are described as restricted to Nuclear Central America and therefore belong to a broader regional-endemic category. ^[S2]

{
  "type": "bar",
  "title": "Guatemala-endemic amphibians by family",
  "description": "The 57 strict country-endemic amphibians in the 2026 USAC treatment.",
  "unit": "species",
  "orientation": "horizontal",
  "data": [
    {"label": "Plethodontidae", "value": 36},
    {"label": "Craugastoridae", "value": 11},
    {"label": "Hylidae", "value": 10}
  ],
  "source": "[S2] Unidad de Vida Silvestre, FMVZ-USAC"
}

Plethodontid country-endemic checklist

The national biodiversity portal’s amphibian checklist is based on literature and scientific collections and is revised from Acevedo’s Guatemalan herpetofauna treatment. The following species-rank records form the 36-species plethodontid component used here; the national 2026 family total is kept separate from the portal’s update cycle. ^{[S7] [S2]}

Pseudoeurycea exspectata is retained in the checklist because the portal treats it as a Guatemala endemic at species rank and labels it extinct. Extinct and living records therefore should not be silently combined when deriving extant-endemic counts. ^[S7]

Reptile endemism includes mountain lizards and narrow-range snakes

USAC reports 28 reptile species endemic to Guatemala in a 275-species national reptile fauna. ^[S2] The Guatemala Biodiversity Portal checklist was last updated on 5 November 2025 and contains 277 reptile species under its own treatment. Because those two versions are not identical, the national total and the portal-resolved endemic identities are not forced into one synchronized count. ^[S8]

Tantilla bairdi shows how sparse the record can be even for a named country endemic: a 2025 paper reported only the fifth documented record of the species and described its rediscovery in Guatemala. ^[S9]

Freshwater fishes: the count is stable, the species set is not

A 2022 Central American assessment recognized 13 Guatemala-endemic freshwater fishes among 249 species. Eight were in threatened categories, four were Data Deficient and one was Least Concern. ^[S3] A current FishBase country checklist also returns 13 endemic fishes, but four names differ between the two treatments. ^[S10] The two lists therefore should not be merged into a larger synthetic set.

{
  "type": "donut",
  "title": "Assessment classes among the 13 endemic freshwater fishes",
  "description": "The 2022 assessment classified eight as threatened, four as Data Deficient and one as Least Concern.",
  "unit": "species",
  "data": [
    {"label": "Threatened", "value": 8},
    {"label": "Data Deficient", "value": 4},
    {"label": "Least Concern", "value": 1}
  ],
  "source": "[S3] Diversity 14(10):793 (2022)"
}

How the two 13-species treatments differ

Mammal endemism is concentrated in small highland species

The Mammal Diversity Database records 251 living mammal species for Guatemala. ^[S4] Country-only distributions in the current species accounts are concentrated in shrews, deer mice and one bat rather than Guatemala’s larger, wider-ranging mammals.

Taxonomic changes can alter the apparent endemic set without any change on the ground. The current MDD account for Peromyscus guatemalensis limits it to the Altos Cuchumatanes and notes that populations formerly included in it are now assigned to P. carolpattonae and P. bakeri. ^[S22] Peromyscus mayensis has an even tighter documented range: the type locality and its close vicinity. ^[S23]

Plant endemism is numerically the largest documented national component

CONAP reports close to 900 plant species with some degree of endemism and more than 550 species found exclusively in Guatemala. ^[S1] A single country page should not convert that national figure into a short “top species” list. The table below instead provides current accepted-name reference entries from Kew for strict Guatemala-native species across wet, montane and seasonally dry biomes.

Erythrostemon guatemalensis is a recent addition to the accepted flora: Kew records its first publication in Kew Bulletin in 2025 and its native range as Guatemala, primarily in seasonally dry tropical habitat. ^[S26] This is the type of taxonomic change that can make older national plant lists lag behind the current accepted-name backbone.

The strict country-endemic bird line is historical

Under the AOS-based Avibase treatment for Guatemala, the single country-endemic bird is Podilymbus gigas, the Atitlán Grebe, and it is listed as extinct. ^[S31] This makes bird endemism different from the living micro-endemic patterns seen in salamanders, reptiles and small mammals.

The Resplendent Quetzal (Pharomachrus mocinno) is closely associated with Guatemala but is not a Guatemala-only endemic. CONAP describes its native distribution as Mesoamerican, extending from southern Mexico through Central America to Panama. ^[S32]

Specialist beetle data expose a montane invertebrate pattern

Guatemala lacks a compatible country-wide endemic-invertebrate total comparable with the herpetofauna figures. A taxonomically narrow dataset can still show the spatial pattern. A 2023 synthesis of Chrysina scarab beetles recognized 28 species in Guatemala, including two undescribed species, and treated 12 as Guatemala endemics after examining more than 1,700 specimens from 68 localities. ^[S33]

The same study identifies Los Cuchumatanes, the western Cordillera Volcánica, Merendón, Espíritu Santo and Chamá–Las Minas among its higher-priority biogeographic subzones for Chrysina, showing that montane concentration is not limited to vertebrates. ^[S33]

Strict endemic, regional endemic or native

Country endemism refers to natural native distribution confined to Guatemala. A species can be characteristic of Guatemala, threatened there, or even carry “guatemalensis” in its scientific name without meeting that geographic test.

The 2026 herpetofauna dataset makes the same distinction numerically: 57 amphibians and 28 reptiles are strict Guatemala endemics, while 75 amphibians and 93 reptiles are restricted to the wider Nuclear Central America region. ^[S2] Keeping those categories separate prevents regional endemics from being counted as Guatemala-only species.