| المصدر: |
New remarkable Late Jurassic teleosts from southern Germany: Ascalaboidae n. fam., its content, morphology, and phylogenetic relationships, pp. 31-59 in Fossil Record, 19(1), 34-48, (2016-01-18) |
| الوصف: |
Ebertichthys ettlingensis n. sp. Figures 2–13 2008 Undescribed small teleost. – Ebert and Kölbl-Ebert, fig. 6. 2011 Ascalabos -like. – Ebert and Kölbl-Ebert, fig. 8. 2015 Teleost sp. 1. – Ebert et al., p. 21, fig. 13b; p. 22, fig. 14a. Diagnosis: Same as generic diagnosis. Derivation of name: The specific name ettlingensis refers to the locality of Ettling and its rich and beautifully preserved fossils, from which the fishes were recovered. Holotype: JME ETT 108 a and 108b is preserved in part and counterpart. It is a complete, beautifully preserved specimen of about 75 mm total length including soft anatomy preservation (part of digestive system) and squamation (Fig. 2a). The specimen is heavily ossified, so that it is interpreted as an adult although the presence of unfused hypurals 1 and 2 and haemal arch of preural centrum 1 with their respective centrum. Paratypes: JME ETT 11, JME ETT 24 (Fig. 2c), JME ETT 60, JME ETT 61, JME ETT 64 a, JME ETT 132 a, b (Fig. 2b), JME ETT 148, and JME ETT 847 a. Type locality and age: Ettling (Plattenkalks I– III), Bavaria (Arratia and Tischlinger, 2010; Ebert et al., 2015). Upper Jurassic, probably upper Kimmeridgian (Ebert et al., 2015) to lower Tithonian. However, the age of the locality is approximated due to the fact that well-preserved ammonoids have not been recovered. Description General description: The fish is small, below 90 mm total length, slightly fusiform, and with dorsal, pelvic, and anal fins producing a triangular outline, with the dorsal fin almost equidistant to the pelvic and anal fins (Fig. 2a–c). Dorsal fin insertion placed posterior to the midpoint of standard length (61 to 64 %). Pelvic fin insertion about at the midpoint of standard length (about 52 to 55 %). Anal fin insertion 69 to 73 % of standard length (SL). Caudal peduncle deep, about half of the maximum body depth. The head is proportionally large, about 33 % of standard length. In a young individual (JME ETT 61) of 34.7 mm total length, the head is comparatively larger (37 % of SL). Eye ... |