Bourbonnella hirsuta ŠTAMBERG , 2007

Štamberg, Stanislav, 2013, Knowledge Of The Carboniferous And Permian Actinopterygian Fishes Of The Bohemian Massif - 100 Years After Antonín Frič, Acta Musei Nationalis Pragae Series B 69 (3 - 4), pp. 159-182 : 169-170

Bourbonnella hirsuta ŠTAMBERG, 2007

Text-fig. 5 , fig. 4

2003 Aeduella sp ; Štamberg, fig. 4.

2006 Bourbonnella sp. ; Štamberg, p. 226, fig. 5

2007 Bourbonnella hirsuta n. sp.; Štamberg, p. 39, figs 40–55, pls. 18–25.

H o l o t y p e: Specimen MHK 63858 has a well-preserved head and partly preserved anterior region of the trunk, housed in the Museum of Eastern Bohemia at Hradec Králové .

R e f e r r e d s p e c i m e n s: Besides the holotype, specimen MHK 70611, and plate MHK 70610 (part and counterpart), there are two specimens: one of which belongs to Bourbonnella hirsuta , and the other to the genus Paramblypterus .

L o c u s t y p i c u s: Kochov “In the Streams” near by the town of Letovice, Blansko district, Czech Republic.

S t r a t u m t y p i c u m: Kochov Horizon, Middle Letovice Formation, Early Permian.

O c c u r r e n c e: Kochov “In the Streams”, Drválovice “Windmill”.

D i a g n o s i s ( Štamberg 2007): Bourbonella reaching 15 cm in total length. The total body length is 5 times the length of the head, and 3.6 times the height of the body at the level of pelvic fin. Scale count is

28

40

12? 25 36

Supraorbital anterior has conspicuous sculptured ridges, and forms the anterior and dorsal border of the orbit, together with the dermosphenotic. These bones separate the nasal and frontal from the orbit. The nasal and the dermosphenotic separate the supraorbital anterior from the frontal. Triangular antorbital is present in the rostral region. Rectangular frontal is 1.5 times longer than the square parietal. Triangular dermosphenotic has posterior margin shifted posteriorly, nearly to the level of the fronto-parietal suture. Dermopterotic is rectangular. The interconnection between the supraorbital and infraorbital sensory canals occurs through the pit line running from frontal to dermosphenotic, or from frontal to dermopterotic. The median pit line on the parietal runs from parietal to dermopterotic. Five small suborbital bones overlap one another dorsoventrally, some of which bear spines on their ventral margin. Strong maxilla has triangular maxillary plate. Operculum is very high, dorsal third of the bone bends anteriorly. The suboperculum is high, the operculum is 1.5 times higher than the suboperculum. The posterior edge of the suboperculum is one-third higher than the anterior one. Two short branchiostegal rays, paired gular lateral, and median gular medial are present. Skull roof is posteriorly rimmed with paired extrascapular medial and paired extrascapular lateral. Posterior margin of the supracleithrum bears sharply pointed spines. Similar spines occur on the posterior margin of the flank scales behind the head. The flank scales from the eighth to twentieth scale row are pectinated posteriorly. Fringing fulcra on the leading edges of paired and unpaired fins are not numerous. Small field of minute scales present along the base of the dorsal and anal fins. Five or six large median scutes occur in front of dorsal fin, one pair of large scales occurs in front of anal fin. The oblique row in front of the anal fin is composed of 22 scales.

Figures

Text-fig. 5. Reconstruction of aeduellids from the Bohemian Massif. 1 – Spinarichthys dispersus (FRITSCH, 1895) (after Štamberg 1986). 2 – Neslovicella elongata ŠTAMBERG, 2010 (after Štamberg 2010). 3 – Neslovicella rzehaki ŠTAMBERG, 2007 (after Štamberg 2007). 4 – Bourbonnella hirsuta ŠTAMBERG, 2007 (after Štamberg, 2007). Scale bar represents 20 mm.