Eudiscoderma, Soisook, Pipat, Prajakjitr, Amron, Karapan, Sunate, Francis, Charles M. & Bates, Paul J. J., 2015
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publication ID |
https://doi.org/ 10.11646/zootaxa.3931.4.4 |
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publication LSID |
lsid:zoobank.org:pub:C943D429-BF58-4B2D-876F-50132E650DF7 |
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DOI |
https://doi.org/10.5281/zenodo.3860410 |
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persistent identifier |
https://treatment.plazi.org/id/03BAD22D-F61E-D36E-FF0A-B768FA929310 |
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treatment provided by |
Plazi |
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scientific name |
Eudiscoderma |
| status |
gen. nov. |
Eudiscoderma View in CoL gen. nov.
Disc-nosed bat
Figures 1–11 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 View FIGURE 10 View FIGURE 11 ; Tables 1–2 View TABLE 1 View TABLE 2
Type species. Eudiscoderma thongareeae View in CoL sp. nov.
Etymology. The genus name is derived from the well-defined disc-shaped noseleaf of the type species. The genus gender is neuter.
Diagnosis. Eudiscoderma has the following unique combination of characters, which discriminates it from all other currently described genera in the family Megadermatidae ( Table 1 View TABLE 1 ).
In the upper dentition, the first upper premolar (P2) is absent. Therefore, the dental formula is i 0/2, c 1/1, p 1/ 2, m 3/3 = 26. The upper canine is greatly enlarged, almost twice the crown area of the upper premolar (P4) ( Figs. 4 View FIGURE 4 , 5 View FIGURE 5 b), and more than twice the height ( Fig. 6 View FIGURE 6 b); it is without a discrete anterolingual cingular cusp but has a large posterior accessory cusp, which is attached for most of its length to the main cusp and is about equal in height to the upper premolar (P4). In the first upper molar (M1), the preparacrista is subequal in length to the postmetacrista, which is not elongated; the mesostyles of both M1 and M2 are well developed; the mesostyle of M1 is situated labially as both the postparacrista and premetacrista are not shortened ( Fig. 7 View FIGURE 7 ).
In the lower dentition, the canine (C1) has a well defined cingulum but is without an anterolingual cingular cusp. The first premolar (P2) is noticeably large and rounded, equal to or exceeding, the crown area of the more rectangular second lower premolar (P4) ( Figs. 4 View FIGURE 4 , 5 View FIGURE 5 b). In the first and second molars (M1 and M2), the crown area of the talonid is about two-thirds that of the trigonid ( Fig. 7 View FIGURE 7 b).
In the skull, the rostrum has a pronounced depression but is without an expanded frontal shield or preorbital or postorbital processes ( Fig. 8 View FIGURE 8 b). The sagittal crest is well developed. The coronoid process of each half mandible is greatly enlarged ( Fig. 6 View FIGURE 6 b).
The baculum is Y-shaped with two small but distinct prongs, which represent about 25% of the baculum length, which is 2.1 mm ( Fig. 9 View FIGURE 9 b). The shaft is slightly curved and there is a depression on its ventral surface.
In external morphology, the posterior noseleaf is relatively short, erect and rounded; the longitudinal ridge is slightly convex in the mid-part and with a heart-shaped base; it resembles a ‘down arrow’; the anterior noseleaf is similar in width to the posterior noseleaf but is shorter ( Fig. 1 View FIGURE 1 b). In the interfemoral membrane, the principal blood vessel that runs from each ankle merges with the middle vertical vessel some 15 mm below the anus ( Fig. 1 View FIGURE 1 a).
As the genus is believed to be monotypic, the description below may serve for both genus and species.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.