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Echinodermata, Asteroidea

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Echinodermata, Asteroidea Contr. Tert. Quatern. Geol. 28(1) 35-43 3 figs, 1 pi. Leiden, August 1991 Early Miocene luidiid asteroids (Echinodermata, Asteroidea) from Winterswijk-Miste (The Netherlands) John W.M. Jagt Venlo, The Netherlands Jagt, John W.M. Early Miocene luidiid asteroids (Echinodermata, Asteroidea) from Winterswijk-Miste (The Netherlands). — Contr Tert. Quatern. Geol., 28(1): 35-43, 3 figs, 1 pi. Leiden, August 1991. Dissociated ossicles (inferomarginals, ambulacrals and adambulacrals) of luidiid asteroids (Luidiidae) from early Miocene Hemmoorian (Oxlundian) strata at Winterswijk-Miste (province ofGelderland, The Netherlands) are illustrated and briefly described. The material is with Luidia ciliaris for the time left in nomenclature. It a new compared(Philippi,contemporary 1837), but, being, open may represent forma within the Ciliaris ofthe Luidia Forbes, 1839. The occurrence to subspecies or Group (sensu Döderlein, 1920) genus present appears be stratigraphically older than records of Miocene luidiids from central Poland. - - Key words Echinodermata, Asteroidea, Luidiidae, Miocene, Hemmoorian (Oxlundian), The Netherlands. J.W.M. Jagt, Tweede Maasveldstraat 47, 5921 JN Venlo, The Netherlands. Contents Introduction 35 p. 36 Systematic description p. Future studies p. 39 Acknowledgements p. 40 References 40 p. Introduction During processing of a rather small sediment sam- taken from ple a temporary outcrop at Winterswijk- Miste (Fig. 1) in 1988, dissociated ossicles of the asteroid genus Luidia were recognised amongst the generally diverse echinoderm remains. Asteroids found in this material isolated ossicles are as only and comprise at least nine species. Astropectinids are the commonest asteroids, and include three or four of which be still undes- species, some appear to cribed. Figure 2 illustrates morphological differen- Some of the ces between astropectinids and luidiids. well asteroid ossicles available for study are fairly but preserved, most are corroded and/or abraded, location of Fig. 1. Locality map showing temporary exposure and often fragmentary. Echinoids comprise cida- (black dot) at Winterswijk-Miste. Abbreviations: W - rids, and clypeasteroids spatangoids. Ophiurid Winterswijk, M - Miste, B - Bredevoort (modified after ophiuroids are apparently extremely rare as only Janssen, 1984). 36 lateral arm plates and vertebrae have so far been recorded. From coeval or slightly younger strata (Hem- moorian-Reinbekian) in NW Europe luidiids were unknown up to now. R. Janssen (1972) described from the northwest German Middle and Late Miocene several species of Astropectinidae and Goniasteridae, but no Luidiidae. Polish occurrences of luidiids of middle Miocene (Badenian) age were recorded by Kaczmarska (1987). The Polish mate- rial (referred by Kaczmarska to two modern taxa, but probably representing only one species) appears to be conspecific with the Dutch material, which is here compared with Luidia ciliaris (Philippi, 1837). Over the few well past years, contemporary as as fossil luidiidasteroids have received ample attention in various papers, especially those by Blake (1972, 1973, 1982) and Blake & Guensburg (1989). SYSTEMATIC DESCRIPTION Classification follows Blake (1987, 1989) and Gale (1987a). Class Asteroidea de Blainville, 1830 Superorder Valvatacea Perrier, 1884 Order Paxillosida Perrier, 1884 Suborder Diplozonina Spencer & Wright in Moore, 1966 Family Luidiidae Sladen, 1889 Genus Luidia Forbes, 1839 Type species — Luidia fragilissima Forbes, 1839 (= Asterias ciliaris Fig. 2a-c. Cross sections of arms of luidiid (A, C) and astropec- Philippi, 1837). tinid (B) asteroids to show position ofindividual ossi- — Ciliaris Hemicnemis cles (modified after Clark, 1982, Döderlein, 1920, Species group Group (subgenus Miiller and Fell, 1963). & Troschel, 1840) sensu Doderlein, 1920. 37 Luidia aff. illustrated herein Nationaal sp. ciliaris (Philippi, 1837) mens (PI. 1), PI. 1 Natuurhistorisch Museum Collections, Leiden, Compare: RGM registration numbers 383 547-383 554. Description — Blake (1973) presented detailed 1837 Asterias ciliaris 194. Philippi, p. of the ossicles of various luidiid 1920 Luidia ciliaris Doderlein, 287, 288, 18, descriptions species Philippi pp. pi. used and indicated the fig. 8; pi. 19, fig. 17; pi. 20, fig. 34. (for terminology see Fig. 3) ciliaris — 39a. 1927 Luidia (Philippi) Mortensen, p. 70, fig. following features to be characteristic of the Ciliaris 1953 Luidia ciliaris — 380. (Philippi) Clark, pp. 379, Group sensu Doderlein (1920): — 1973 Luidia ciliaris 1837 Blake, 40, 10, (Philippi), p. pi. figs - inferomarginals: outline crescentic, without a dis- 1-26. boss mod- tinct inner face step; superambulacral 1982 Luidia ciliaris — 170, 3k (Philippi) Clark, p. fig. (with distal articulation synonymy). erately prominent; ridge parallel 1987 Luidia ciliaris (Philippi, 1837)— Kaczmarska, 139, pi. ossicle outline wide p. to curvature, rectangular, very 5, figs 6-8. with articulation and long, two marginal processes; 1987 Luidia alternata — 139 (Say, 1825) Kaczmarska, p. (? pars), proximal articulation ridge shortand wide. pi. 5, figs 10, 11 (? non 9, 12). - ambulacrals: ambulacral body triangular, asym- — Unt G Material Dissociated ossicles including inferomar- metrical; dentition weak, with medial gap; ambulacrals and adambulacrals oral GG ginals {c. 40), ( c. 10) small; apophyse prominent; subsym- (c. 10), J.W.M. Jagt Collection, and the speci- metrical; aboral ridge low and rounded. neozelanica 1925; Ciliaris Fig. 3. Diagrammatic representations of various ossicles of a luidiid asteroid Luidia Mortensen, Group) illustrating morphological terms used in the text (modified after Blake, 1973). A - left adambulacral, B - right adambulacral, C - - face surface - inferomarginals, D - ambulacrals; 1 - spine bases, 2 - dml (distal face muscle 1), 3 psr1 (proximal 1), 4 - - - 6 - distal articulation 7 - articulation 8 adambulacral 9 superambulacral boss, 5 inner face step, ridge, proximal ridge, notch, - - oral 10 - aboral 11 - ambulacral 12 - medial 13 14 Unt G Insertion des apophyse, ridge, body, gap, dentition, (“Grube zur - 16 - face muscle unteren Quermuskels”), 15 GG (“Flügel zur Verbindung mit den Adambulacralia”), pm1 (proximal depression 1). German terminology is after Müller (1953). 38 A comparison of Blake's (1973) detailed descrip- from southern Norway, the Skagerrak, Kieler tion of ossicle morphology of Luidia ciliaris with the Bucht, Shetland Islands, Faeroe Channel, south to Miste material makes it clear that this should be the Canaries and Azores (? Cape Verde Islands), classed in the Ciliaris Group. It shows the following and the Mediterranean at depths between 1-400 typical features: metres (Doderlein, 1920; Mortensen, 1927[1977]; Dons, 1937; Blake, 1973; Rodriguez, 1980; Tor- 1980; Clark, 1982). Inferomarginals tonese, Discussion — The stratigraphically oldest luidiid to - outline crescentic 1, 13, far Luidia inferomarginal (PI. Figs have been recorded so is hungarica, based I 4 from , 16) on a fragmentary specimen Nagybatony (Hun- - distinct inner face no step (PI. 1, Figs 13, 14, 16) gary) and described by Rakusz (1927). Spencer & - boss prominent (PI. did not superambulacral moderately Wright (in Moore, 1966, p. U 43, fig. 42/3) 1, and it is this Fig. 14) question this generic assignment on - distal ossicle articulation ridge parallel to curva- material that based the of the Hungarian they range and outline ture (PI. 1, Figs 10, 14) very angular Luidia Dr D.B. Blake genus (Miocene-Recent); (let- with distinct notch 1, Figs 9, 10, 12) considers the marginal (PI. ter of March 28, 1989) tells me that he - three moderate-sized spine bases (PL 1, Figs 9-14) with which specimen to be incorrectly identified, - short and wide proximal ridge (PI. 1, Figs 9, 12, conclusion I Hess also concur. (1955, p. 68) briefly 15) discussed this record and stated literally, Luidia dieser hungarica aus dem Miozan diirfte hingegen that the Ambulacrals Gattung angehoren.' He remarked occur- of rence a 'modern' species of luidiid was quite - ambulacral body triangular and asymmetrical (PI. possible, since Mio-Pliocene Italian astropectinid 1, Figs 4, 7) species displayed modern features and were refer- - dentition weak, with medial 1, 4, gap (PI. Figs 5) Another able to the genus Astropecten Gray, 1840. - Unt G small (PI. 1, Fig. 4) fossil asteroid to have previously been referred to - oral apophyse prominent (PI. 1, Figs 5, 6) the Luidiidae is the Liassic (early Jurassic) Asterias - GG subsymmetrical (PI. 1, Figs 4, 7) murchisoni which Hess Williamson, 1836, (1955, p. - aboral ridge low and rounded (PI. 1, Figs 5, 6) 68) referred with a query to Plumaster Wright, 1861 (? Tropidasteridae Wright, 1880). Adambulacrals The Miste specimens have been collected from the Aalten Member, Miste Bed, Hiatella arctica - pml moderately wide (PI. 1, Fig. 3) Acme Zone and/or base of Astarte radiata Acme - psrl relatively large (PL 1, Fig. 3) Zone den and of ( sensu van Bosch et al., 1975) are - spine bases weak (PI. 1, Figs 1, 2) Hemmoorian(Oxlundian) age (A.W. Janssen, 1984; - dml large (PI. 1, Figs 1, 2) also A.W. Janssen & King, 1988; see Rogl, 1990). would the In contrast with Blake (1973), who concentrated on This correspond to proposed global early descriptive ossicle morphology, Clark (1982) Miocene Burdigalian Stage (Cowie & Bassett, 1989; described external features and tabulated the fol- Hinsch, 1990; Jenkins, 1990). The Polish luidiids Kaczmarska lowing characteristics for Luidia ciliaris: described by (1987) are apparently
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