Hoploparia muncki Pelseneer, 1885

Tshudy, Dale M., Hyžný, Matúš, Veselská, Martina Kočová & Jagt, John W. M., 2022, Taxonomic revision of the extinct clawed lobster genus Oncopareia Bosquet, 1854 (Decapoda, Astacidea, Nephropidae), Palaeontologia Electronica (a 20) 25 (2), pp. 1-31 : 22-24

Hoploparia muncki Pelseneer, 1885

1885 Hoploparia muncki Pelseneer , p. 44 [8], fig. 1.

1929 Hoploparia muncki Pelseneer ; Glaessner, p. 221.

1941 Oncopareia muncki (Pelseneer) ; Mertin, p. 188, text-fig. 8d.

2010 Hoploparia muncki Pelseneer ; Schweitzer et al., p. 30.

2010 Oncopareia muncki (Pelseneer) ; Schweitzer et al., p. 32.

2018 Hoploparia muncki Pelseneer ; Tshudy et al., p. 183.

Material examined. None.

Remarks. Tshudy (1993, pp. 147–148) and Tshudy et al. (2018) maintained Pelseneer’s (1885) referral to Hoploparia , based on its antennal carina (albeit short), the diverging submedian carinae of the telson, and the granulation of the cephalothorax, pleon and telson. Its pleonal pleura are more like those of Homarus than those of Hoploparia .

Range and occurrence. Upper Cretaceous, lower Maastrichtian (Ciply-Malogne Phosphatic Chalk Formation; see Robaszynski et al. (2002) of the Mons Basin, southern Belgium).

ASTACIDEA INCERTAE SEDIS “ Hoploparia” macrodactyla Schlüter in von der Marck and Schlüter, 1868

Figure 12A–B

1862 Hoploparia longimana (Sowerby) ; Schlüter, p. 723, pl. 11, fig. 5.

1868 Hoploparia macrodactyla Schlüter in von der Marck and Schlüter, p. 295.

1886 Ischnodactylus macrodactyla (Schlüter) ; Pelseneer, p. 163.

1929 Ischnodactylus macrodactylus (Schlüter) ; Glaessner, p. 226.

1941 Oncopareia macrodactylus (Schlüter) ; Mertin, p. 179.

1993 Oncopareia? macrodactyla (Schlüter) ; Tshudy, p. 301.

2010 Oncopareia macrodactylus (Schlüter) ; Schweitzer et al., p. 32.

Material examined. None.

Remarks. Mertin (1941, p. 186) examined Schlüter’s illustrated specimen and noted that: 1) the specimen’s claws were not as well preserved as the illustration indicated; 2) the cephalothorax and shape of the claw palms were indistinguishable from those of Oncopareia coesfeldiensis ; and that 3) the claw denticles were not of uniform length, as erroneously depicted in Schlüter, but of different lengths, as in O. coesfeldiensis . According to Mertin (1941), the only difference between Schlüter’s specimen and O. coesfeldiensis was that the palm of the former had two rows of large spines on the upper edge; these spines being absent in O. coesfeldiensis . Mertin (1941) declared the specimen referable to O. coesfeldiensis but did not discuss the specimen’s presumably equal claws, the latter indicated by Schlüter’s illustration and in Pelseneer’s remarks (1886, p. 163). Unfortunately, without the re-examination of the original material (which has not been traced) it is difficult to state whether the morphology of both claws as depicted is genuine. Based on the apparent lack of important characters and poor preservation of the original material we consider “ Hoploparia” macrodactyla an astacidean lobster with unknown affinities ( Astacidea incertae sedis), at least for the time being.

Range and occurrence. Upper lower ‘Senonian’ of Dülmen, northwest Germany ( Mertin, 1941, p. 179); in current terminology this would mean the Dülmener Schichten of early Campanian age.

Figures

FIGURE 12. Astacidean lobsters with uncertain affinities. A-B, “Hoploparia” macrodactyla Schlüter, in von der Marck and Schlüter, 1868; fragmentary cephalothorax with associated claws (from Schlüter, 1862, pl. 11, fig. 5). C, “Nymphaeops” belgicus Forir, 1887; cephalothorax in dorsal view (from Forir, 1887, pl. 7, fig. 1). D, “Nymphaeops” sendenhorstensis Schlüter, 1862; cephalothorax with pleon and chelipeds (from Schlüter, 1862, pl. 14, fig. 5).