Eumops glaucinus (J. A. Wagner, 1843)

García, Franger J., Ochoa-G, José, Poma-Urey, José L., Miller, Bruce W., Falcão, Fábio C. & del Valle Alvarez, Martín Roberto, 2024, Expanding the knowledge of the bat fauna of the Brazilian Caatinga: new geographical records of molossid bats (Chiroptera, Molossidae) for the Chapada Diamantina region, with taxonomic notes, ZooKeys 1210, pp. 333-371 : 333-371

Eumops glaucinus (J. A. Wagner, 1843)

Summary of captures.

Eight females ( CMARF 2123–2130) and 13 males ( CMARF 2131–2143).

External measurements and weights.

Females: TLB: 142.25 (135.00–150.00), TL: 51.32 (41.46–58.00), LHL: 9.86 (7.91–11.00), EL: 22.33 (21.00–25.00), W: 33.12 (27.00–36.00). Males: TLB: 144.00 (137.00–148.00), TL: 51.84 (45.00–58.00), LHL: 10.53 (9.00–12.00), EL: 23.93 (22.18–26.00), W: 31.46 (28.00–36.00).

Morphological description.

The fur color is dark brown to cinnamon, grayish dorsally, and pale brown ventrally, showing slight contrast between both sides (Fig. 7 ). The ears are wider than long and joined at the forehead. Antitragus is well developed, with a broad base. The tragus is small, wide, and square in shape. Snout elongated, with smooth upper lips. Gular-thoracic gland present in males.

Skull elongated, with variations in the posterior portion of the braincase; in some specimens, the posterior region is more elevated, while in others, it is flatter (Fig. 7 ). Similarly, the sagittal crest in some specimens is notably well-developed. In contrast, it is less perceptible to others. The lambdoidal crest is developed and evident. The basisphenoid pits are deep. Palate arched. The upper incisors are fused at the bases and divergent at the tips. Some skull measurements are presented in Table 1 .

Identification.

Externally, the forearm <65 mm, and the short ears (averaging <34 mm in both sexes) differentiate this species from the largest members of Eumops ( E. chimaera, Gregorin, Moras, Acosta, Vasconcellos, Poma, dos Santos & Paca, 2016 , E. dabbenei O. Thomas, 1914 , E. perotis (Schinz, 1821) , and Eumops trumbulli O. Thomas, 1901 ), while the small, wide, square-shaped tragus, besides the pale brown pelage coloration, separates it from Eumops auripendulus (G. Schaw, 1800) , which presents a pointed tragus and a blackish pelage ( Eger 2008).

Figures

Figure 7. Dorsal, ventral, and lateral views of the skull of a female (CMARF 2127 A, C upper) and a male (CMARF 2131 B, C lower) of Eumops glaucinus collected in the Caatinga (northeastern Brazil), showing sexual dimorphism in some dimensions D external body features of a female of E. glaucinus from the same locality (CMARF 2127). Scale bar 5 mm.