Atti Soc. it. Sci. nat. Museo civ. Stor. nat. Milano, 150 (II): 197-206, Giugno 2009 Alessandro Garassino", Pedro Aitai*" & Giovanni Pasini Jabaloya aragonensis n. gen., n. sp. (Crustacea, Decapoda, Mecochiridae) and Cedrillosia jurassica n. gen., n. sp. (Crustacea, Decapoda, Glypheidae) from thè Upper Jurassic of Temei Province (Aragón, Spain) Abstract - Decapod macrurans from thè Upper Jurassic are reported from Jabaloyas and Cedril- las villages (Temei, Aragón). The studied specimens have been ascribed to thè infraorder Astacidea Latreille, 1802, including Jabaloya aragonensis n. gen., n. sp. (Mecochiridae Van Straelen, 1925) and Cedrillosia jurassica n. gen., n. sp. (Glypheidae Zittel. 1885). The new taxa enlarge thè knowledge of thè macruran fauna from thè Jurassic of Spain. Key words: Crustacea, Decapoda. Upper Jurassic, Spain. Resumen - Jabaloya aragonensis n. gen., n. sp. (Crustacea, Decapoda, Mecochiridae) y Cedril¬ losia jurassica n. gen.. n. sp. (Crustacea. Decapoda. Glypheidae) del Juràsico superior de la provincia de Temei (Aragón. Espana). Se describe un conjunto de decàpodos macmros del Juràsico superior. recuperado de las pobla- ciones de Jabaloyas y Cedrillas, ambas en la provincia de Temei (Aragón). Los nuevos registros se adscriben a la infraorden Astacidea Latreille. 1802 e incluyen Jabaloya aragonensis n. gen.. n. sp. (Mecochiridae Van Straelen. 1925) y Cedrillosia jurassica n. gen.. n. sp. (Glypheidae Zittel, 1885). Los nuevos taxones amplian el conocimiento de la escasa fauna de macmros descrita hasta ahora en el Juràsico espanol. Palabras clave: Cmstacea. Decapoda, Juràsico superior, Espana. Riassunto -Jabaloya aragonensis n. gen., n. sp. (Cmstacea. Decapada. Mecochiridae) e Cedrillo¬ sia jurassica n. gen., n. sp. (Cmstacea. Decapada, Glypheidae) del Giurassico superiore della Provincia di Temei (Aragona, Spagna). ' Museo di Storia Naturale, Corso Venezia 55, 20121 Milano, Italy, e-mail: [email protected] " Museu Geologie del Seminari Conciliar de Barcelona, Diputación 231, 08007 Barcelona. Spain. e-mail: [email protected] "" Museo Civico dei Tossili di Besano, Via Prestini 5, 21050 Besano (Varese), Italy, e-mail: [email protected] 198 ALESSANDRO GARASSINO, PEDRO ARTAL & GIOVANNI PASINI Vengono descritti dei crostacei decapodi del Giurassico superiore rinvenuti presso i villaggi di Jabaloyas e Cedrillas (Temei, Aragona). Gli esemplari studiati sono stati attributi alTinfraordine Asta- cidea Latreille, 1802 che comprende Jabaìoya aragonensis n. gen., n. sp. (Mecochiridae Van Straelen, 1925) e Cedrillosia jurassica n. gen., n. sp. (Glypheidae Zittel, 1885). Questi nuovi generi approfon¬ discono le conoscenze della fauna a macruri del Giurassico della Spagna. Parole chiave: Crustacea, Decapoda, Giurassico superiore, Spagna. Introduction and geological setting The presence of macrurans in thè Jurassic of Spain is poorly mentioned in litera- ture, and based on a single, incomplete specimen (Solé & Via, 1989). From thè marine deposits of thè upper Oxfordian, north to thè Jabaloyas village (Province of Temei) (Fig. 1), several specimens preserved in nodules were collected by thè geologist Sixto Femàndez during some field works in thè 70s and were housed in thè Museu Geologie del Seminari Conciliar of Barcelona. The layers consist of limestones and interbedded marly beds yielding thè concretions with cmstaceans, both levels being considered to belong to thè Yatova Formation (Soria & Pérez, 2002). The deposits are characterized by abundant sponges within thè limestones and isolated and well-preserved macro¬ fauna in marls, mainly poriferans, and less common ammonoids and brachiopods. A single carapace assigned here to thè family Glypheidae, was recovered near thè village of Cedrillas (Province of Temei) (Fig. 1) from limestones with scarne macrofauna (mollusc remains). The marine deposits are constituted by massive micritic limestones, and corresponds to an Upper Kimmeridgian-Portlandian inter- val, Everticycìammina virguliana zone, Retrocyclammina arrabidensis and chou- berti subzones (Felgueroso & Ramirez, 1971). Previous records of Jurassic macrurans from Spain The specimens of macmrans from thè Jurassic of Spain are very rare. Dupuy & Revilla (1956) reported only one specimen of glypheids from thè Upper Jurassic of Bunyol (Foia de Bunyol, Valéncia) ascribed to “GlyphecT serratoseli (Museum of IGME of Madrid). Fig. 1 - Geographic map with thè fossiliferous localities. / Cartina geografica con le località fossilifere. 1) Cedrillas. 2) Jabaloyas. JABALOYA ARAGONENSIS N. GEN., N. SP. AND CEDRILLOSIA JURASSICA N. GEN., N. SP. OF SPAIN 199 Material The studied sample includes twelve fragmentary and articulated specimens, housed in thè Museu Geologie del Seminari Conciliar of Barcelona (MGSB). The specimens are three-dimensionally preserved in non calcareous nodules. Their pre- paration was difficult as a result of thè induration of thè suiTounding matrix. The studied specimens are ascribed to Jabaìoya aragonensis n. gen, n. sp. (eleven spe¬ cimens) and Cedrillosia jurassica n. gen., n. sp. (one specimen). Abbreviations PI, first pereiopod; al-aó, abdominal segments. Systematic Palaeontology Infraorder Astacidea Latreille, 1802 Superfamily Glypheoidea Zittel, 1885 Family Mecochiridae Van Straelen, 1925 Included fossil genera: Mecochirus Germar, 1827; Meyeria McCoy, 1849; Pseudogìyphea Oppel, 1862; Huhatanka Feldmann & West, 1978. Genus Jabaìoya nov. Diagnosis: carapace subcylindrical, laterally compressed; rostrum short; anterior part of carapace with one longitudinal ridge, running medially; cervical groove deep, strongly inclined; postcervical and branchiocardiac grooves parallel strongly inclined; postcervical groove weak; branchiocardiac groove deep; hepatic groove prominent, deeply incised, strongly curved postero-ventrally; uropodal exopod with diaeresis. Etymology: from thè small village of Jabaloyas where thè studied specimens were discovered. Type species: Jabaìoya aragonensis n. sp. Description: as for thè type species. Discussion. At present Mecochiridae includes four fossil genera from thè Upper Triassic to Upper Cretaceous. As argued by Forster (1978), Feldmann & West (1978) and Feldmann et ai. (1995), orientation and relative development of thè main carapace grooves, carapace and abdominal omamentations, and length of PI are thè useful morphological characters for thè identifìcation of each genus. Therefore, Jabaìoya n. gen. cannot be assigned to four mecochirid genera (Fig. 2). Even though thè orientation and development of thè main carapace grooves and a strongly reduced gastric region share Jaboìaya n. gen. with Mecochirus Germar, 1827, and Meyeria McCoy, 1849, thè prominent, postero-ventrally, strongly curved hepatic groove, and thè presence of only one median longitudinal ridge cutting in two equal parts thè gastric region distinguish thè new genus from thè others. Dif- ferent is instead thè orientation of thè main carapace grooves between Jabaìoya n. gen. and Pseudogìyphea Oppel, 1862. Moreover, thè development of thè gastric region is different: reduced in thè new genus and wide in Pseudogìyphea. Finally, thè absence of branchiocardiac groove and a wide gastric region distinguish Huha¬ tanka Feldmann & West, 1978, from thè new genus. 200 ALESSANDRO GARASSINO, PEDRO ARTAL & GIOVANNI PASINI Fig. 2 - Comparison among thè carapaces of thè genera belonging to Mecochiridae and thè carapace of thè new genus. / Confronto tra i carapaci dei generi della famiglia Mecochiridae e il carapace del nuovo genere. 1) Jabaloya n. gen. 2) Pseudoglyphea Oppel, 1862. 3) Mecochirus Germar, 1827. 4) Meyeria McCoy, 1849. 5) Huhatanka Feldmann & West, 1978. Out of scale. Jabaloya aragonensis n. sp. Figs. 2-6 Diagnosis: as for thè genus. Etymology: thè trivial name alludes to Aragón Region where thè studied spe- cimens were discovered. Holotype: MGSB 74517. Paratypes: MGSB 56544 a, b. Type locality: Jabaloyas (Temei, Aragón). Geological age: Upper Jurassic (upper Oxfordian). Material and measurements: eleven fragmentary and articulate specimens in lateral view; length of carapace between 30 and 40 mm. MGSB 56554 a, b, c, d, e, f, g, h, i, 56555 a-b (part and counter-part), 74517. Thoracic and abdominal appen- dages not preserved. Description: medium-sized mecochirid with exoskeleton strongly tuberculate. Carapace. Carapace with dorsal margin nearly inflated. Posterior margin with a sigmoid curve produced near posteroventral temiination. Posteroventral margin stron¬ gly curved. Anteroventral margin inflated, inclined from anterior termination ventrally to near posterior termination of cephalic region where it curves strongly ventrally to join posteroventral margin. Anterior margin almost vellicai. Rostrum short, smooth. Cervical groove slightly sinuous, strongly inclined, intercepting dorsal surface at an JABALOYA ARAGONENSIS N. GEN., N. SP. AND CEDRILLOSIA JURASSICA N. GEN., N. SP. OF SPAIN 201 angle of about 50° at a distance one third of total length of dorsal margin from anterior. Branchiocardiac groove strongly inclined, approaching dorsal surface at an angle of about 20° and then curving slightly dorsally to intersect thè dorsal surface at an angle of about 25°. Postcervical groove strongly inclined, parallel to branchiocardiac groove for its all length. Hepatic groove prominent, strongly curved postero-ventrally. Cervical, branchiocardiac, and hepatic grooves deep, narrow, well marked. Postcervical groove weak. Cephalic region omamented by one tuberculate lateral ridge running medially, dividing thè gastric region in two equal parts. All regions omamented by deep pits. Gastric region strongly reduced for thè strong inclination of cervical groove. Abdomen. Abdomen well developed. al reduced, about half as long as a2. a2 about one third longer than a3 through a5 which are of about equal length. a6 longer than thè others. Tergal regions of all segments smooth, generally subrectangular, bounded on lateral sides by two deep grooves. Pleura of a2-5 strongly developed, highly omamented. Major surface of pleura tuberculate. Ventral and lateral margins fìnely punctuate. Pleura of a2-5 triangular with a small spine developed on termi- nation. Pleuron of aó strongly triangular, pointed with smooth ventral and lateral margins. Telson subrectangular, smooth. Uropodal endopod with a median longitu- dinal ridge well developed for all its length. Uropodal exopod with well developed median longitudinal ridge, extemal margin bordered by a row of well-developed spines, thè last two distai spines longer than thè others. Upper margin of rounded diaeresis fìnely semate with centrai spine longer than thè lateral ones. Cephalic appendages. Preserved only thè small eye and thè first article of thè antennulae. Fig. 3 - Jabaloya aragonensis n. gen., n. sp., carapace. 1) antennal ridge / carena antennale. a) bran¬ chiocardiac groove / solco branchiocardiaco. b) antennal groove / solco antennale. bt) hepatic groove / solco epatico, c-c ) postcervical groove / solco postcervicale, e-efì cervical groove / solco cervicale. Fig. 4 - Jabaloya aragonensis n. gen., n. sp., incomplete reconstruction / ricostruzione incompleta. 202 ALESSANDRO GARASSINO, PEDRO ARTAL & GIOVANNI PASINI Fig. 5 -Jabaloya aragonensis n. gen., n. sp., holotype / olotipo, MGSB 74517 (x 2.5). Fig. 6 - Jabaloya aragonensis n. gen., n. sp., paratype / paratipo, MGSB 56554 c (x 3.3) JABALOYA ARAGONENSIS N. GEN., N. SP. AND CEDR1LL0S1A JURASSICA N. GEN., N. SP. OF SPAIN 203 Family Glypheidae Zittel, 1885 Included tossii genera: Glvphea v. Meyer, 1835; Litogasterv. Meyer, 1844; Trachy¬ soma Bell, 1858; Squamosoglyphea Beurlen, 1930; Paralitogaster Glaessner, 1969. Genus Cedrilìosia nov. Diagnosis: carapace subcylindrical, laterally compressed; rostrum short; antennal region with one longitudinal ridge, running parallel to thè anteroventral margin; cervical groove deep, steeply inclined; postcervical groove sinuous, redu- ced, divergent to branchiocardiac groove; branchiocardiac groove deep, having a curved V-shaped bifurcation extending in thè cardiac region, directed forwards; inferior groove almost straight, deeply impressed; gastro-orbital groove curved, bifurcated, delimiting two raised lobes. Etymology: from thè small village of Cedrillas where thè studied specimens were discovered. Type species: Cedrilìosia jurassica n. gen., n. sp. Description: as for thè type species. Discussion. At present Glypheidae includes five tossii genera and thè Recent Neoglyphea Forest & de Saint Laurent, 1975, and Laurentaeglyphea Forest, 2006. Among thè fossil genera, there was particular confusion regards thè identifìcation of Glyphea v. Meyer, 1835, and Trachysoma Bell, 1858. In fact Quayle (1987) Fig. 7 - Comparison among thè carapaces of thè genera belonging to Glypheidae and thè carapace of thè new genus / Confronto tra i carapaci dei generi della famiglia Glypheidae e il carapace del nuovo genere. 1) Cedrilìosia n. gen. 2) Paralitogaster Glaessner, 1969. 3) Glyphea v. Meyer. 1835. 4) Lito- gasterv. Meyer, 1844. 5) Squamosoglyphea Beurlen, 1930. 6) Trachysoma Bell, 1858. Out of scale. 204 ALESSANDRO GARASSINO, PEDRO ARTAL & GIOVANNI PASINI considered thè latter, as junior synonym of Glyphea. However, if we consider thè orientation and relative development of thè main carapace grooves as diagnostic characters to distinguish thè genera of Glypheidae (Feldmann & de Saint Laurent, 2002), we must consider distinct these two genera. In fact, Paralitogaster Glaes- sner, 1969, Litogaster v. Meyer, 1844, and Trachysoma Bell, 1858, have parallel postcervical and branchiocardiac grooves, while both grooves converge posteriorly, and thè postcervical groove is incompletly developed in Glyphea v. Meyer, 1835. The postcervical and branchiocardiac grooves are instead absent in Squamosogly- phea Beurlen, 1930. If we consider valid this method to distinguish thè genera of Glypheidae, thè orientation and relative development of thè main carapace grooves of thè studied specimen do not resemble any of thè above-mentioned genera for thè reduced postcervical groove, not parallel to branchiocardiac groove and for thè branchio¬ cardiac groove having a V-shaped bifurcation in thè cardiac region, peculiar cha- racter of thè new genus (Fig. 8). Among thè genera of Glypheidae, thè V-shaped bifurcation of branchiocadiac groove is also present in Glyphea. In fact, it is thè only genus in which some species such as G. bathonica de Ferry, 1865, G. muen- steri (Voltz) in v. Meyer, 1840, G. regleyana Desmarest, 1822, G. yoshiakii Kato & Karasawa 2006, show this character. However, a deepened analysis reveals that thè V-shaped bifurcation of thè branchiocardiac groove directed forwards or back- wards, is in reality an extension of postcervical groove, connected to thè branchio¬ cardiac groove by a thin unnamed groove. In thè new genus, thè branchiocardiac groove has a true lateral branch, extending in thè cardiac region without joining to thè postcervical groove. Since Glyphea has never been thè subject of a deepened review, we could suppose thè existence of two different groups of glypheids, with or without thè connection between postcervical and branchiocardiac grooves. For thè moment this reai V-shaped bifufcation of thè branchiocardiac groove, peculiar of Cedrillosia n. gen., is not present in any genus belonging to Astacidea. Cedrillosia jurassica n. sp. Figs. 7-9 Diagnosis: as for thè genus. Etymology: thè trivial name alludes to thè Jurassic, geological period of thè studied specimen. Holotype: MGSB 24780. Type locality: Cedrillas (Temei, Aragón). Geological age: Upper Jurassic (upper Kimmeridgian-Portlandian). Material and measurement: one complete carapace in lateral view, 30 mm long. MGSB 24780. Abdomen, cephalic and thoracic appendages not preserved. Description: carapace with dorsal margin nearly straight. Posterior margin sigmoid, produced near posteroventral termination. Posteroventral margin gently curved. Anteroventral margin nearly straight, inclined from anterior termination ventrally to near posterior termination of cephalic region where it curves slightly ventrally to join posteroventral margin. Anterior margin almost vertical. Rostrum short, smooth. Cervical groove slightly sinuous, steeply inclined, intercepting dorsal surface at an angle of about 80° at a distance one third of total length of dorsal margin from anterior. Branchiocardiac groove oblique, approaching dorsal JABALOYA ARAGONENSISN. GEN., N. SP. AND CEDR1LLOSIA JURASSICA N. GEN., N. SP. OF SPAIN 205 surface at an angle of about 40° and then curving slightly dorsally to intersect dorsal surface at an angle of about 50°. Branchiocardiac groove having curved V-shaped bifurcation directed forwards and extending in thè cardiac region. Distai part of branchiocardiac groove and lateral branch delimiting a triangular-shaped, smooth raised lobe. Postcervical groove reduced divergent to branchiocardiac groove for its all length, diverging abruptly from it ventrally to a point near thè middle of carapace where it curves slightly ventrally and posteriorly to join branchiocardiac groove. Proximal part of branchiocardiac and postcervical grooves delimiting a subtriangular-shaped, smooth raised lobe. Postcervical groove then slightly cur¬ ving anteriorly where it intersects almost straight inferior groove and joining ven- tral margin. Gastro-orbital groove curved, bifurcated, delimiting two curved raised lobes dose to cervical groove. All grooves deep, narrow, well marked. Antennal region omamented by one tuberculate lateral ridge running parai lei to anteroven- tral. Branchial region omamented with deep pits. Gastric, antennal, cardiac, hepa- tic, and pterigostomial regions omamented with weak pits. Fig. 8 - Cedrìllosìajurassica n. gen., n. sp. LI : 30 mm. L2: 27 mm. L3: 17 mm. h: 10 mm. A) antennal region / regione antennale. B) branchial region / regione branchiale. C) cardiac region / regione car¬ diaca. G) gastric region / regione gastrica. H) hepatic region / regione epatica. P) pterigostomial region / regione pterigostomiale. a) branchiocardiac groove / solco branchiocardiaco. a ) accessory branch of branchiocardiac groove / ramificazione laterale del solco branchiocardiaco. c-c ) postcervical groove / solco postcervicale, d) gastro-orbital groove / solco gastro-orbitale, e-e ) cervical groove / solco cervi¬ cale. i) lower groove / solco inferiore. Fig. 9 - Cedrìllosìa jurassica n. gen., n. sp., holotype / olotipo, MGSB 24780 (x 3). 206 ALESSANDRO GARASSINO, PEDRO ARTAL & GIOVANNI PASINI Acknowledgements We wish to thank S. Calzada, Museu Geologie del Seminari Conciliar, Bar¬ celona, for thè permission to study thè specimens and H. Karasawa, Mizunami Fossil Museum, Mizunami (Japan) for careful review and criticism. Drawings by F. Fogliazza. References Dupuy E. & Revilla J., 1956 - Dos especies fósiles nuevas en las provincias de Valencia y Alicante. Noticias y Comimìcaciones Instituto Geològico y Minerò, 43: 5-9. Feldmann R. 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Quayle W. J., 1987 - English Eocene Crustacea (lobsters and stomatopod). Palae- ontology, London, 30: 581-612. Solé J. & Via L., 1989 - Crustacis Decàpodes fòssils dels Paisos Catalans. Batalle- ria, Barcelona, 2: 23-42. Soria C. & Pérez I., 2002 - Estudio paleontològico y valoración patrimonial de los yacimientos de ammonoideos del Oxfordiense (Juràsico Superiror) en la Sierra de Albarracin (Sector Terriente-Veldecuenca-Jabaloyas). Teruel, 88-89 (1): 135-154. Ricevuto: 1 ottobre 2008 Approvato: 20 ottobre 2008