Therya_notes_127(345)

THERYA NOTES 2023, Vol. 4 : 183-189 DOI: 10.12933/therya_notes-23-127 ISSN 2954-3614

New records and distributional extensions of Peropteryx leucoptera, Gardnerycteris crenulatum, and Lampronycteris brachyotis in Bolivia

Nuevos registros y ampliación de las distribuciones de Peropteryx leucoptera, Gardnerycteris crenulatum y Lampronycteris brachyotis en Bolivia

José L. Poma-Urey1,2*, Luis H. Acosta Salvatierra1,2, Nicolas Malpartida1,2, Héctor E. Ramírez-Chaves3,4, and José Ochoa G.5

1Museo de Historia Natural Noel Kempff Mercado, Universidad Autónoma Gabriel René Moreno. Av. Irala 565. Santa Cruz de la Sierra, Bolivia. E-mail: jose_luispoma@hotmail.com (JLP-U); l.jubatus096@gmail.com (LHAS); nmalpartidaferrero@gmail.com (NM).

2Fundación para la Conservación del Bosque Chiquitano. Av. Ibérica 95. Santa Cruz de la Sierra, Bolivia.

3Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Caldas. Calle 65 No. 26-10, Manizales. Caldas, Colombia.

4Centro de Museos, Museo de Historia Natural, Universidad de Caldas. Carrera 23 No. 58-65, 170004, Manizales. Caldas, Colombia. E-mail: hector.ramirez@ucaldas.edu.co (HER-Ch).

4Centro de Estudios en Zoología Aplicada, Universidad de Carabobo. Av. Intercomunal de Bárbula. Valencia, Venezuela. E-mail: jochoabat@gmail.com (JOG).

*Corresponding author

In the last 5 years, the knowledge of bats (Chiroptera) in Bolivia has advanced significantly, adding 10 species and an updated list for the country. Still, some species are represented by a few voucher specimens (n < 8), such as Peropteryx leucoptera (Emballonuridae), Gardnerycteris crenulatum, and Lampronycteris brachyotis (Phyllostomidae). Here, we provide new records that extend the geographic distribution of these species in Bolivia, along with morphometric data. Based on specimens collected and deposited in systematic collections, we performed qualitative and quantitative comparisons of external and craniodental variables with the original taxonomic descriptions of the 3 species. We also compiled and projected in maps the localities corresponding to historical records in Bolivia. The new records represent distributional extensions to 10 biogeographic provinces in Bolivia. The specimens of P. leucoptera come from the southeastern region of the country. For G. crenulatum and L. brachyotis we present the southernmost and the easternmost records in Bolivia, respectively. The specimens of P. leucoptera tend to be smaller than others collected in the region, while the specimens of G. crenulatum are slightly larger than those reported from other countries. The new records extend the known geographic ranges of these species between 197 and 736 km in Bolivia. We recommend increasing efforts to update the geographic distributions of other species with scarce records in Bolivia.

Key words: Chiroptera; Emballonuridae; geographic distribution; mammals; Phyllostomidae; South America.

En los últimos 5 años, el conocimiento de los murciélagos (Chiroptera) de Bolivia ha avanzado significativamente, adicionándose 10 especies y una lista actualizada para el país. A pesar de los avances en el conocimiento de la fauna de murciélagos, algunas especies han sido registradas por pocos especímenes de referencia (n < 8), tales como Peropteryx leucoptera (Emballonuridae), Gardnerycteris crenulatum y Lampronycteris brachyotis (Phyllostomidae). Aquí reportamos nuevos registros para estas especies que amplían sus distribuciones en Bolivia y señalamos datos morfométricos adicionales. La revisión incluye especímenes colectados y depositados en colecciones sistemáticas, realizamos comparaciones cualitativas y cuantitativas de variables externas y cráneo-dentales con las descripciones taxonómicas originales de las 3 especies. También compilamos y proyectamos en mapas las localidades correspondientes a registros históricos en Bolivia. Los nuevos registros representan extensiones de distribución a 10 provincias biogeográficas dentro de Bolivia. Los especímenes de P. leucoptera provienen de la región sureste del país. Para G. crenulatum y L. brachyotis presentamos el registro más austral y oriental en Bolivia, respectivamente. Los especímenes de P. leucoptera tienden a ser más pequeños que otros colectados en la región, mientras que los especímenes de G. crenulatum son ligeramente mayores que aquellos reportados en otros países. Los nuevos registros extienden entre 197 y 736 km los rangos geográficos conocidos para estas especies en Bolivia. Recomendamos incrementar los esfuerzos orientados a la actualización de las distribuciones de otras especies con escasos registros en Bolivia.

Palabras clave: Chiroptera; distribución geográfica; Emballonuridae; mamíferos; Phyllostomidae; Sudamérica.

In Bolivia, the study of bats has shown important advances in the last 5 years as a product of research carried out by a group of mammalogists associated to different national and international institutions. The results include the first records of 10 species (Peropteryx leucoptera, P. pallidoptera, Anoura latidens, Micronycteris sanborni, Gardnerycteris koepckeae, Sturnira giannae, Molossus fluminensis, Eptesicus langeri, E. brasiliensis, E. diminutus) and an updated check list of bats known in the country (Poma-Urey et al. 2019; Velazco and Patterson 2019; Calderón-Acevedo and Muchhala 2020; Loureiro et al. 2020; Poma-Urey et al. 2020, 2021; Acosta et al. 2021a; Siles et al. 2021; Siles and Wallace 2021; Poma-Urey et al. 2023). Some bat species have been reported in Bolivia in very restricted geographic areas or by few voucher specimens. This is particularly true for Peropteryx leucoptera (Emballonuridae; 5 specimens), Gardnerycteris crenulatum (Phyllostomidae; 7 specimens), and Lampronycteris brachyotis (Phyllostomidae; 2 specimens; Aguirre and Urioste 1994; Anderson 1997; Acosta et al. 2021b; Poma-Urey et al. 2021).

Previous records of P. leucoptera in Bolivia are limited to 3 localities in 2 biogeographic provinces: 1) Southeastern Amazon, and 2) Beniana (Navarro 2011; Poma-Urey et al. 2021). Lampronycteris brachyotis has been recorded in 2 localities in 2 biogeographic provinces: 1) Beniana, and 2) Southwestern Amazon (Navarro 2011; Acosta et al. 2021b). Gardnerycteris crenulatum has been recorded in 13 localities (some records without voucher specimen) in 4 biogeographic provinces: 1) Southwestern Amazon, 2) South-Central Amazon, 3) Beniana, and 4) Peruvian-Bolivian Yungueña (Anderson 1997; Emmons 1998; Terán 2010; Navarro 2011).

Here, we provide new records and distributional extensions of P. leucoptera, G. crenulatum, and L. brachyotis in Bolivia. To this end, we based our analysis in the recognition of diagnostic characters and morphometric data and compared this information with that of other specimens collected in the region. Finally, we spatially projected the records to provide a geographical context.

The new records of P. leucoptera, G. crenulatum, and L. brachyotis in Bolivia are based on 18 specimens deposited at the Museo Noel Kempff Mercado (MNKM), Santa Cruz, Bolivia. For each individual examined we took external measurements (in mm), including total length (TL), tail length (T), hindfoot length (HF), forearm length (FA), and weight (W) in g. We also took 12 cranio-dental measurements, based on the criteria proposed by Simmons and Voss (1998), Barquez et al. (1999) and Díaz et al. (2021): greatest length of skull (GLS), condyloincisive length (CIL), condylocanine length (CCL), postorbital breadth (PB), braincase breadth (BB), mastoid breadth (MB), zygomatic breadth (ZB), maxillary toothrow length (MTL), across molars breadth (BAM), across canines breadth (BAC), mandibular toothrow length (LMT), and mandible length (LM).

To identify the specimens, we used the external and cranio-dental measurements, in addition to diagnostic characters. We based the identification on the following authors: Peropteryx.- Hood and Gardner (2008), Lim et al. (2010), and Velazco et al. (2021); Gardnerycteris.- Hurtado and Pacheco (2014), Hurtado and D'Elía (2018), and Díaz et al. (2021); Lampronycteris.- Williams and Genoways (2008), Rocha et al. (2013), and Díaz et al. (2021). Finally, we compiled the geographic information of the specimens analyzed and documented in the literature, to confirm additional localities of P. leucoptera (e.g., Poma-Urey et al. 2021), G. crenulatum (e.g., Anderson 1997; Emmons 1998; Aguirre 2002; Terán 2010; Siles and Wallace 2021), and L. brachyotis (e.g., Acosta et al. 2021b). We projected the new records and the historical collection localities in maps and listed the corresponding biogeographic provinces (Appendix 1). The provinces biogeographic are based on Navarro (2011).

We reviewed 18 museum specimens corresponding to P. leucoptera (1), G. crenulatum (16), and L. brachyotis (1); of these, 1 specimen of G. crenulatum and 1 of L. brachyotis were collected in January 2023 at the Centro de Estudios Alta Vista (Knowledge Bases for Restoration Project).

The new record of P. leucoptera (Figure 1a), collected in June 2021, corresponds to an adult male (MNKM 5826; Appendix 1), for which the diagnostic and external morphological characters match: size (FA 39 mm - 48 mm; Hood and Gardner 2008; Lim et al. 2010; Velazco et al. 2021); translucent wings, gradually darkening to brown from tips to body; and large pterygoid pits (Velazco et al. 2021; Figure 1b). In contrast, P. pallidoptera, similar to P. leucoptera, exhibits translucent and evenly tinged pale brown wings, and smaller pterygoid pits separated by the presphenoid bone (Lim et al. 2010; Velazco et al. 2021). The external measurements are within the interval of variation of P. leucoptera, while cranio-dental measurements tend to be smaller with respect to other specimens in the region (specifically GLS, CIL, CCL, ZB, MTL, and LM; Table 1). The specimen, 1 adult male, MNKM 5826, was collected by L. H. Acosta Salvatierra and J. L. Poma-Urey in July 19, 2021, using mist nets at the entrance of a cave at the department Santa Cruz, San José de Chiquitos, Taturuquí (17° 54´ 25.65” S, 60° 40´38.19” W, 480 m), where the predominant vegetation corresponds to Chiquitano Forest (Figure 2). Other species found in the same cave were Peropteryx macrotis and Glossophaga soricina. This locality belongs to the Western Cerradense biogeographic province (Figure 2).

For G. crenulatum, the new records correspond to adult males (8) and adult females (8); this species differs from other phyllostomids by the following combination of characters: medium size (FA 45 mm - 51 mm); wing membrane attached to the metatarsals; nasal blade with crenulations and hairs; dorsal fur with a faint or marked white line; and presence of 2 lower incisors and 2 lower premolars (Hurtado et al. 2014; Hurtado and Pacheco 2014; Díaz et al. 2021). It can be differentiated among its congeners by the grayish to blackish brown color of the dorsal fur (reddish or golden brown in G. koepckeae) and thin, whitish dorsal line (broad and yellowish in G. keenani). Gardnerycteris crenulatum exhibits a narrow basioccipital bone at cochlear level and superficial basisphenoid pits, while G. keenani exhibits a broad basioccipital and shallow basisphenoid pits (Hurtado and D’Elía 2018). All the specimens reviewed here match the previously described diagnostic characters (Figure 1c). The external and cranio-dental measurements are included in Table 2, all of them within the interval of variation for this species, although Bolivian specimens tend to be larger both externally and cranially with respect to other specimens in the region (Table 2). The specimens were captured with mist nets in 8 lowland localities: Department Santa Cruz: Concepción, Centro de Estudios Alta Vista (16° 5' 29.76'' S, 61° 50' 18.79'' W, 433 m). January 22, 2023. 1 adult male, MNKM 5823. Laguna Marfil (15° 25' 36.54'' S, 60° 18' 22.92'' W, 213 m). October 24, 2019. 1 adult female, MNKM 5815. Área Protegida Municipal Bajo Paragua (14° 0' 36.1'' S, 62° 1' 21.78'' W, 207 m). August 19, 2021. 1 adult male, MNKM 5825. Parque Noel Kempff Mercado, Flor de Oro (13° 33' 10'' S, 61° 0' 51'' W, 172 m). September 21, 1995. 1 adult female, MNKM 1911. Parque Noel Kempff Mercado, Pampa de Termiteros (14° 40' 38.1'' S, 60° 54' 46.22'' W, 189 m). October 11, 2002. 2 adult females, MNKM 3281, 3282. September 13, 2017. 1 adult male, MNKM 5586. Department Beni: Comunidad Maravilla, Lago Largo (12° 54' 44.15'' S, 65° 46' 20.22'' W, 154 m). June 5, 2016. 1 adult male, MNKM 5611. Quiquibey, Tierra Comunitaria de Origen Pilón Lajas (14° 38' 15.7'' S, 67° 30' 38.8'' W, 242 m). June 24, 1999. 1 adult male, MNKM 2845. Reserva Paraba Barba Azul (13° 44' 51.9'' S, 66° 5' 56.9'' W, 156 m). July – Augut, 2010. L. H. Acosta Salvatierra, captured and released 7 specimens, 3 males and 4 females. The specimen MNKM 5823, was collected between 0.5 and 3 m above the ground in Centro de Estudios Alta Vista, in the Western Cerradense Occidental biogeographic province (Figure 2), where the vegetation corresponds to a semi-dry sub-humid forest of Chiquitanía and Beni, affected in 2019 by fires. Other species captured were Artibeus lituratus, A. obscurus, Desmodus rotundus, L. brachyotis, and G. soricina.

The new record, collected in January 2023, of L. brachyotis corresponds to a subadult female (MNKM 5824; Figure 1d). This species exhibits the following diagnostic and external morphological characters: medium size (FA 38.3 mm - 42.5 mm); ears pointed with concave upper outer edge and lacking a connecting skin band; lower lip with a pair of “V”-shaped tubercles; metacarpals gradually variable in length, fifth being shortest; length of the calcaneus equal to or greater than the length of the feet (Williams and Genoways 2008; Díaz et al. 2021); GLS between 20.2 mm - 22.8 mm; and upper incisors of chisel-shaped with length less than half the height of the canines (Rocha et al. 2013). The most similar species in Bolivia belongs to the genus Micronycteris, and they can be differentiated from L. brachyotis by the presence of a skin band between the ears (Williams and Genoways 2008). Another similar species is Trinycteris nicefori, but with a body size slightly smaller (FA 37.1 mm - 40.2 mm; GLS 19.5 mm - 20.2 mm), the calcar smaller than the foot, and the upper incisors not chisel-shaped (Rocha et al. 2013; Acosta et al. 2021b). The specimen MNKM 5824 matches all the diagnostic characters of L. brachyotis. However, the external and cranial measurements are outside the lower limit of the interval reported for this species because it corresponds to a subadult (Table 2), with unfused phalanges epiphysis. In addition, it exhibited a soft-textured fur with a chromatic pattern where grayish brown predominates, different from the yellowish color frequently indicated for adult specimens (Figure 1d; Table 1; Williams and Genoways 2008). The specimen MNKM 5824 was captured with mist nets in Centro de Estudios Alta Vista (16° 5´ 29.7” S, 61° 50´ 18.8” W, 433 m). Mist nest was located on the banks of a water dam where dominant vegetation is Chiquitano Forest, corresponding to the Western Cerradense biogeographical province. Other species captured were A. lituratus, A. obscurus, D. rotundus, G. crenulatum, and G. soricina.

The new records increase the knowledge on the current distribution of bat species poorly documented in Bolivia and scarcely represented in national systematic collections. In the case of P. leucoptera MNKM 5826, the new record (fourth for Bolivia and first for the department of Santa Cruz), extends its geographic range 736 km south of its nearest record in the department of Beni: Refugio de Vida Silvestre “Espíritu” (Appendix 1), and to a new biogeographic province, the Western Cerradense (Figure 2; Navarro 2011; Poma-Urey et al. 2021). Similarly, in the case of G. crenulatum MNKM 5823, the new records extend its geographic range 197 km south of its nearest record in the Parque Noel Kempff Mercado, Pampas de Termiteros (Appendix 1), including the province Western Cerradense (Figure 2); and the southernmost known record slightly increases the elevational limits reported for this species in the country to 433 m (330 m; Siles and Wallace 2021). In the case of L. brachyotis MNKM 5824, the new locality extends its geographic range in the country 290 km to the east of the closest record and includes a new biogeographic province Cerradense Occidental (Figure 2; Navarro 2011; Acosta et al. 2021b).

We highlight the importance of these new records as a source of information to evaluate morphological variations, mainly in the case of G. crenulatum. The morphometry of this taxon has been scarcely documented in Bolivia and to date is restricted to some external and cranial measurements of 3 specimens (FA 51 mm - 53 mm; Aguirre and Urioste 1994; Anderson 1997). In addition, is important to continue documenting the diversity of bats in Bolivia, and in this sense, systematic collections play a very important role in preserving voucher specimens. We recommend the review of specimens deposited in the systematic collections of the country, especially in the cases of those taxa little studied or documented (e.g., Promops spp. or Eumops spp.; Anderson 1997), to have a better understanding of their distributional patterns, habitat preferences, and abundance.

Finally, although the species studied are classified of "Least Concern" according to the International Union for Conservation of Nature (IUCN), their presence in the sampling localities and their preferences for primary forests (Solari et al. 2019), and taking into account other bioindicator species, could, together with these bats, suggest satisfactory ecological conditions (Schulze et al. 2000).

Acknowledgements

We would like to express our special thanks to the Fundación para la Conservación del Bosque Chiquitano (Knowledge Bases for Restoration Project, funded by the Government of Canadá), for providing the funds that made this research possible. H. Azurduy, R. Arispe, R. Montaño, S. Gutiérrez, and D. García provided valuable support during the execution of this project and facilitated our stay at the Centro de Estudios Alta Vista. K. Rivero, allowed access to the specimens preserved in the zoological collection at the Museo Noel Kempff Mercado. Finally, we thank 2 anonymous reviewers who helped us to improve this manuscript.

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Associated editor: Cristian Kraker Castañeda.

Submitted: April 22, 2023; Reviewed: September 5, 2023.

Accepted: September 14, 2023; Published on line: September 26, 2023.

Appendix 1

Locations of previous records of the bats examined.

Family Emballonuridae

Peropteryx leucoptera

Bolivia. Beni: Versalles (12° 44' S, 66° 10' W, 168 m). Refugio de Vida Silvestre “Espíritu” (14° 13' S, 66° 24' W, 162 m). Pando: Reserva Nacional Amazónica Manuripi-Heath, San Miguel (11° 31' S, 67° 40' W, 171 m); (Poma-Urey et al. 2021).

Family Phyllostomidae

Gardnerycteris crenulatum

Bolivia. Beni: mouth of the río Baures (12° 30' S, 64° 18' W, 139 m); (Anderson 1997). Espíritu (14° 8' S, 66° 24' W, 170 m); (Aguirre 2002). La Paz: Bajo Inicua (15° 17' 51'' S, 67° 26' 44'' W, 330 m); (Siles and Wallace 2021). Parque Nacional y Área de Natural de Manejo Integrado Madidi, sabanas de Antas (12° 55' 9.44'' S, 68° 38' 0.70'' W, 211 m). Puerto Moscoso (13° 2' 4.81'' S, 68° 41' 0.69'' W, 227 m). Pampas del Heath (12° 40' 48.24'' S, 68° 42' 42.52'' W, 184 m). Comunidad Toromonas (12° 20' 20.9'' S, 68° 10' 55.8'' W, 216 m). Comunidad El Tigre (11° 58' 58.4'' S, 68° 0' 51.6'' W, 180 m); (Terán 2010). Pando: Centro Dieciocho (10° 36' S, 66° 47' W, 163 m). Arroyo Hermoso (11° 13' S, 67° 42' W, 192 m). 15 km NW of Puerto Camacho (11° 28' S, 67° 50' W, 236 m). San Miguel (11° 40' S, 67° 43' W, 206 m); (Anderson 1997). Santa Cruz, Parque Nacional Noel Kempff Mercado, Los Fierros (14° 34' S, 60° 52' W, 218 m); (Emmons 1998).

Lampronycteris brachyotis

Bolivia. Cochabamba, Santuario de Vida Silvestre Cavernas de Repechón (17° 3' 39.60'' S, 65° 28' 26.40'' W, 491 m). Santa Cruz, Bosque Experimental Elías Meneses (16° 38' S, 64° 30' W, 191 m); (Acosta et al. 2021b).

Table 1. Comparisons of external and cranio-dental measurements (mm) and weight (g) of Peropteryx leucoptera from Bolivia (MNKM 5826, this study*) with specimens previously recorded in South America: Bolivia (Poma-Urey et al. 2021), Brazil (Mikalauskas et al. 2014), Colombia (Suárez-Castro et al. 2012), Ecuador (McDonough et al. 2010), Perú, Guyana, and French Guiana (Lim et al. 2010). The values correspond to mean, (interval), and sample size.

	Bolivia*	Bolivia	Brazil	Colombia	Ecuador	Perú	Guyana	French Guiana
TL	62	64.8 (62 - 73) 5	-	67.8 (60 - 82) 5	58 (54 - 62) 2	67 (65 - 69) 5	60 (56 - 66) 6	64 (61 - 66) 6
T	14.5	16.1 (14.5 - 19.0) 4	14.2 (13.4 - 14.8) 3	13.5 (11 - 17) 4	12.3 (12.0 - 12.5) 2	14.6 (13 - 16) 5	10.2 (5 - 13) 6	14 (12 - 17) 6
HF	9	8.4 (5.0 - 10.0) 5	7.6 (6.7 - 8.5) 3	8 (7 - 9) 5	8.5 (7 - 10) 2	9.8 (9 - 10) 4	8.3 (7 - 9) 6	8.9 (8.0 - 10.0) 6
E	16	14.3 (8.5 - 19) 5	15.4 (14.3 - 17.6) 3	16.6 (13 - 18) 5	17.5 (17 - 18) 2	19 (17 - 20) 5	15.5 (13 - 16) 6	16.6 (15.0 - 18.5) 6
FA	42.7	46.4 (44.6 - 48.5) 5	43.5 (42.9 - 44.1) 3	42.4 (39.9 - 44.3) 5	44.3 (42.2 - 46.4) 2	45.4 (45 - 46) 5	42.8 (42 - 44) 6	43.8 (42 - 45) 6
W	5.5	-	8.5 (8.2 - 9.0) 3	-	-	8.3 (8.0 - 8.5) 4	5.6 (4 - 7) 5	6.5 (5.5 - 7.8) 6
GLS	14.59	14.9 (14.4 - 16.4) 5	15.6 (15.4 - 15.7) 3	15.6 (15.1 - 16.1) 2	15.8	-	15.3 (14.9 - 15.6) 3	-
CIL	13.32	-	14.6 (14.2 - 14.9) 3	14.3 (13.8 - 14.7) 2	14.8	-	14.0 (13.9 - 14.1) 3	-
CCL	12.64	14.1 (13.9 - 14.3) 5	-	-	-	-	-	-
PB	3.10	3.4 (2.9 - 3.7) 5	3.4 (3.3 - 3.6) 3	3.5 (3.4 - 3.6) 2	3.4	-	3.3 (3.1 - 3.3) 4	-
BB	6.99	6.8 (6.4 - 7.6) 5	7.4 (7.3 - 7.5) 3	7.1 (6.8 - 7.4) 2	7.1	-	7.2 (7.0 - 7.3) 4	-
MB	7.67	7.9 (7.7 - 8.3) 5	8.1 (8.0 - 8.2) 3	8.0 (7.9 - 8) 2	7.9	-	7.8 (7.6 - 8.0) 4	-
ZB	8.70	-	9.8 (9.5 - 9.9) 3	10.1	10.2	-	9.5 (9.3 - 9.6) 4	-
MTL	5.62	6.3 (6.0 - 6.6) 5	6.3 (6.2 - 6.4) 3	6.5 (6.3 - 6.6) 2	6.5	-	6.1 (6.1 - 6.2) 4	-
BAM	6.36	5.8 (5.3 - 7.6) 5	7.2 (7.1 - 7.2) 3	7.2 (6.9 - 7.5) 2	7.4	-	6.9 (6.7 - 7.0) 4	-
BAC	3.75	3.7 (3.4 - 3.9-9 5	4.2 (4.1 - 4.3) 3	-	-	-	-	-
LMT	5.80	6.5 (5.4 - 7.1) 5	6.5 (6.4 - 6.6) 3	-	-	-	-	-
LM	9.22	10.2 (9.8 - 10.7) 5	11.2 (11.1 - 11.3) 3	-	-	-	-	-

Table 2. External and cranio-dental measurements (mm) and weight (g) of Gardnerycteris crenulatum from Bolivia (this study*), Colombia (Morales-Martínez et al. 2020) and other countries of the Neotropics (Brazil, Ecuador, French Guiana, Guatemala, Panama, Perú, Suriname, Trinidad and Tobago, Venezuela; Hurtado et al. 2014). The values correspond to mean, (± standard deviation), and sample size. For Lampronycteris brachyotis, the values include the data here reported (MNKM 5824, this study*) and those of previous records from Brazil and Bolivia (Brandão et al. 2016; Acosta et al. 2021b). The values correspond to mean, (interval), and sample size.

	Gardnerycteris crenulatum			Lampronycteris brachyotis
	Bolivia*	Colombia	Neotropics	Bolivia*	Bolivia	Brazil
TL	90.0 (± 12.26) 9	79.7 (± 6.64) 18	84.1 (± 3.80) 95	63	74.3 (64.5 - 84.1) 2	63.1 (54.7 - 68.1) 5
T	24.2 (± 1.66) 9	23.2 (± 2.86) 19	23.3 (± 2.54) 96	11	10.8 (10.0 - 11.6) 2	10.7 (8.2 - 12.0) 5
HF	11.9 (± 1.59) 9	10.5 (± 0.90) 12	11.6 (± 1.30) 96	12	12.2 (12.0 - 12.4) 2	11.0 (10.0 - 12.0) 5
E	26.6 (± 1.59) 9	23.4 (± 1.98) 19	24.0 (± 1.57) 96	16	14.4 (11.5 - 17.3) 2	14.9 (13.9 - 18.0) 5
FA	50.0 (± 1.68) 16	47.6 (± 1.79) 19	48.0 (±3.39) 96	38.23	41.8 (41.5 - 42.1) 2	40.7 (39.8 - 42.3) 5
W	15.1 (± 3.35) 7	-	-	8	13.3 (12.5 - 14.0) 2	14.1 (12 - 18) 4
GLS	21.9 (± 0.46) 6	21.8 (± 0.55) 26	21.5 (± 0.68) 92	20.20	21.5 (21.4 - 21.6) 2	21.2 (21.1 - 21.3) 2
CIL	19.7 (± 0.38) 6	19.3 (± 0.47) 26	19.1 (± 0.61) 91	17.83	19.6	-
CCL	19.0 (± 0.45) 6	-	-	17.01	18.9 (18.9 - 19.0) 2	-
PB	4.1 (± 0.15) 6	4.2 (± 0.14) 26	4.3 (± 0.16) 91	5.24	5.1 (5.1 - 5.2) 2	5.1 (5.0 - 5.1) 2
BB	8.7 (± 0.32) 6	8.2 (± 0.21) 26	8.7 (± 0.38) 91	8.56	8.9 (8.7 - 9.1) 2	8.9 (8.8 - 9.1) 2
MB	11.9 ( ± 0.39) 6	11.2 (± 0.37) 26	9.7 (± 0.35) 92	9.20	9.8 (9.5 - 10.1) 2	10.1 (10.1 - 10.1) 2
ZB	12.2 (± 0.42) 6	11.8 (± 0.32) 25	12.1 (± 0.46) 90	9.05	10.8 (10.7 - 10.9) 2	11.0 (10.7 - 11.2) 2
MTL	7.9 (± 0.14) 6	7.8 (± 0.21) 26	7.9 (± 0.23) 92	7.55	8.6 (8.4 - 8.8) 2	8.3 (8.3 - 8.3) 2
BAM	8.6 (± 0.15) 6	8.1 (± 0.17) 26	8.3 (± 0.30) 92	6.40	7.2 (7.1 - 7.3) 2	7.1 (6.9 - 7.3) 2
BAC	5.3 (± 0.23) 6	5.3 (± 0.16) 26	5.3 (± 0.22) 92	3.80	3.9 (3.6 - 4.2) 2	4.1 (4.0 - 4.3) 2
LMT	8.7 (± 0.17) 6	-	8.9 (± 0.27) 91	7.68	8.8 (8.6 - 9.0) 2	-
LM	13.5 (± 0.31) 6	-	13.9 (± 0.50) 91	12.79	14.3 (14.0 - 14.6) 2	14.1 (13.9 - 14.2) 2