Amphisauropus Haubold, 1970
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publication ID |
https://doi.org/ 10.5281/zenodo.13510407 |
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persistent identifier |
https://treatment.plazi.org/id/03F387F5-1634-7C39-FCF4-FB138E2961AB |
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treatment provided by |
Felipe |
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scientific name |
Amphisauropus Haubold, 1970 |
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Ichnogenus Amphisauropus Haubold, 1970 Amphisauropus cf. latus Haubold, 1970
Figs. 6A–C View Fig , 7A–I View Fig , 8A–F View Fig .
Material.—Tumlin Gród quarry: Muz. PIG OS−220/26: 6, 7 two consecutive left pedal imprints ( Figs. 7A View Fig , 8E View Fig ); Muz. PIG OS−220/35: 1 left pedal imprint ( Figs. 7B View Fig , 8A View Fig ); Muz. PIG OS−220/37: 1 left pedal imprint ( Fig. 7C View Fig ); Muz. PIG OS−220/52: 1 left pedal imprint ( Figs. 7D View Fig , 8B View Fig ); Muz. PIG OS−220/34: 1–11 fragmentary trackway ( Figs. 6C View Fig , 8F View Fig 2 View Fig ); Muz. PIG OS−220/34: 20 complete pedal imprint with the next, but poorly preserved set of imprints ( Figs. 6B, C View Fig , 7E View Fig , 8C View Fig ); Muz. PIG OS−220/34: 12–19 fragmentary trackway ( Figs. 6A View Fig ; 8F View Fig 1 View Fig ); Muz. PIG OS−220/36: 1–3 fragmentary trackway composed of left manual and next set of pedal and manual imprints ( Figs. 7F View Fig , 8D View Fig ); Muz. PIG OS−220/54: 12 right pedal imprint ( Fig. 7G View Fig ); Sosnowica Hill quarry: Muz. PIG OS−220/5A: 1, 2 left set of pedal and manual imprints ( Fig. 6H View Fig ); Muz. PIG OS−220/5B: 1 isolated, possibly manual imprint; Muz. PIG OS 220/11 left pedal imprint ( Fig. 7I View Fig ).
Description.—Trackway. Despite the relatively common presence of Amphisauropus imprints on some track−bearing surfaces, only poor and fragmentary, irregular trackways have been found ( Figs. 6A–C View Fig , 8F View Fig ). The trackway Muz. PIG OS−220/34: 2–11 shows the following pedal trackway features: stride length 290–310 mm; oblique pace 180–200 mm; width of pace 110 mm; pace angulation 115°. Respective manual values are 290–320 mm, 200–230 mm, 150 mm and 83°. Pedal digit III diverges from the midline at about –20°. The stride exceeds the total pedal length (about 60 mm) approximately three times. Another fragmentary trackway: Muz. PIG OS−220/26: 6, 7 shows the pedal stride length of 250 mm with the stride to pedal length ratio 3.7. Digits III diverge from the midline at –14° and –9°. Poorly and only fragmentary preserved trackway: Muz. PIG OS−220/34: 12–19 ( Figs. 6A View Fig , 8F View Fig 1 View Fig ) shows the following pedal trackway features: stride 195, 160 mm; oblique pace 145, 150, 150 mm; width of pace 118 mm; pace angulation 78°. The pedal width of the digit group I–IV is 49 mm; divarication of digit III from the midline equals –15°. The manual oblique pace in the specimen Muz. PIG OS−220/36: 1–3 attains 115 mm; digits III are inclined to the midline at +25° on average.
Pes.—Both pes and manus are pentadactyl, similar in shape and show no visible metapodial articulations. Even in deep imprints digit tips are usually distinctly rounded ( Fig. 7D, F, I View Fig ) or if somewhat sharpened in shape ( Fig. 7A, C, G View Fig ), show no presence of claw marks. Pedal imprints are relatively wide. Their total length ranges from about 40 mm (specimens Muz. PIG OS−220/35: 1 and Muz. PIG OS−220/11; Fig. 7B, I View Fig ), 50 mm (specimen Muz. PIG OS−220/36: 2; Fig. 7F View Fig ) up to 68 mm (Muz. PIG OS−220/26: 7; Fig. 7A View Fig ). Their total width ranges from 45 to 60 mm, somewhat less than the length. In measured footprints, the digit group I–IV is 37–52 mm long and 38–45 mm wide. The length of digits I–IV increases from I to IV: 18–25, 22–28, 27–35, and 30–38 mm, respectively. Digits I–IV diverge at 30–54°. Digit V is directed somewhat laterally and posteriorly from the digit group I–IV ( Fig. 7A, C–G View Fig ). Divarication of digits I–V varies from 70° up to 92°. Digit V is relatively long, may be longer than digit IV (in specimen Muz. PIG OS−220/26: 7 it’s length is 41 mm). Shallow imprints show only proximal digit end imprints ( Fig. 7B, D, E View Fig ); in deep ones is visible also a sole, being long as like as the palm ( Fig. 7C, E–G View Fig ).
Manus.—Manual imprints are similar in shape to pedal ones being somewhat smaller, and therefore difficult to distinguish in isolated imprints ( Fig. 7F, H View Fig ). Digit lengths increase, as with pedal imprints from I to IV; digit III may be equal to digit IV (specimen Muz. PIG OS−220/5A: 2, Fig. 7H View Fig ). Digits I–V in the well and completely preserved specimen Muz. PIG OS−220/36: 3 ( Figs. 7F View Fig , 8D View Fig ) are 12, 17, 19, and 21 mm long (respectively) being only somewhat shorter than respective pedal ones: 21, 23, 26, 27, and 28 mm. The whole manual imprint of this set is 32 mm long by 47 mm wide, and its digit group I–IV is 30 mm long and 35 mm wide. Divarications of digit axes I–IV and I–V attain 65 and 125°, respectively.
Remarks.— Amphisauropus latus Haubold, 1970 is possibly a younger synonym of “ Ichnium” pachydactylum Pabst, 1900 and “ Saurichnites ” intermedius Fritsch, 1895 (see Haubold 1971a; Holub and Kozur 1981). Revision of all the synonymy concerning this ichnotaxon exceeds the scope of this present work.
Reptilian ichnotaxa
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