1850
Graptolithus palmeus — Barrande, pp. 59, fig. 3:7
1851
Petalolithus palmeus — Suess, pp. 104, fig. 8:1
1868
Diplograptus palmeus — Nicholson, pp. 523, fig. 19:2-3
1881
Cephalograptus ovato-elongatus n. sp. — Kürck, pp. 303, fig. 14:10
1890
Diplograptus palmeus — Törnquist, pp. 29, fig. 1:30-31
1908
Petalograptus palmeus — Elles et Wood, pp. 274, fig. 188a
1908
Petalograptus palmeus var. latus — Elles et Wood, pp. 275, fig. 189a-c; 32:2c-f
1942
Petalolithus ovato-elongatus — Bouček & Přibyl, pp. 2, fig. 1:1-2
1952
Diplograptus (Petalolithus) ovato-elongatus — Münch, pp. 67, fig. 9:1-3
1967
Petalograptus ovato-elongatus — Koren, pp. 133, fig. 1:12
1968
Petalograptus ovato-elongatus — Obut & Sobolevskaya, pp. 72, fig. 7:1, 3-5
1970
Petalograptus ovato-elongatus — Rickards, pp. 47, fig. 3:4
1976
Petalograptus ovatoelongatus (Kurck, 1882) — Sennikov, pp. 147, fig. 6:3-5
1979
Petalograptus ovatoelongatus — Paškevičius, pp. 138-139, fig. 5:12-13; 21:16-17
1986
Petalograptus ovatoelongatus (Kurck) — Ulst, fig. I 1
1988
Petalograptus ovatoelongatus (Kurck, 1882) — Obut et al., pp. 34, fig. II 3
2003
Petalolithus ovatoelongatus (Kurck) — Loydell et al., pp. 209, fig. 4f
2009
Petalolithus ovatoelongatus (Kurck, 1882) — Štorch & Kraft, fig. text fig. 8F