Abstract:A new species of Euprognatha Stimpson, 1871 from off coast of Brazil (Canopus Bank, 02º15.3'00"S - 38º16.0'00"W) is described and illustrated, namely Euprognatha limatula n. sp. The new species is compared to its congeners. Lectotypes are designated for E. acuta A. Milne-Edwards, 1880 and E. granulata Faxon, 1893. A key to the species of Euprognatha is provided.
“…And yet, Guinot and Van Bakel (2020a) expressed the opinion that the intestinal spine in E. ricei may actually be a pleonal spine. Euprognatha (e.g., E. rastellifera and E. limatula Santana and Tavares, 2008;Fig. 4.5, 4.6) further differs from Willinachoides n. gen. in having a prominent spine on the mesobranchial and intestinal regions in some of its species, both of such spines absent in Willinachoides n. gen., and in the absence of a distinct tubercle in the furrow that delimits the cardiac region laterally (present in E. ricei).…”
Section: Methodsmentioning
confidence: 95%
“…Figure 4.Recent Inachoididae. ( 1 ) Inachoides lambriformis (De Haan, 1839), male, cl 15.4 mm, cw 12.0 mm (MCZ 1837); ( 2 ) Paradasygyius depressus (Bell, 1835), male, cl 26 mm, cw 21.2 mm (MZUSP 19261); ( 3 ) Paulita tuberculata (Lemos de Castro, 1949), cl 19 mm, cw 17.2 mm (MZUSP 22543); ( 4 ) Collodes granosus Stimpson, 1860, ovigerous female, cl 9.8 mm, cw 8.6 mm (USNM 55766); ( 5 ) Euprognatha rastellifera Rathbun, 1894, male holotype, cl 9.9 mm, cw 7.4 mm (USNM 18108); ( 6 ) Euprognatha limatula Santana and Tavares, 2008, male holotype, cl 8.5 mm, cw 7.0 mm (MZUSP 16940). V–VIII, fifth to eighth thoracic pleurites.…”
The spider crabs Willinachoides santanai n. gen. n. sp. from the early-middle Miocene of north Brazil and Paradasygyius rodriguezi n. sp. from the late Miocene of Venezuela are described and illustrated. Additionally, Eoinachoides senni Van Straelen, 1933, from the late Oligocene–early Miocene of Venezuela, is redescribed based on photographs of the holotype, and the diagnosis of Eoinachoides latispinosus Carriol, Muizon, and Secretan, 1987, from the late Miocene of Peru, is emended also on the basis of photographs of the holotype. The past distribution points to a Tethyan background for the current amphi-American Inachoididae, with the oldest fossil species known from the early Eocene Tethyan regions (Pakistan and Italy), and from the late Eocene–late Pliocene of the Americas. The high number of monotypic genera in Inachoididae could be the result of rapid dispersion followed by diversification during the Neogene of the tropical America, facilitated by global and regional events (e.g., eustatic sea level changes, the Mi-1 Oligocene-Miocene boundary global cooling, the global warming period of the Middle Miocene Climate maximum, closure of the Panama Isthmus, and marine incursions into the Amazon Basin). The shoaling and final closure of the Central American Seaway are thought to have critically affected the evolution of the inachoidids and shaped their current distribution patterns.
UUID: http://zoobank.org/6275fdc4-4bfa-4873-9320-3143d4915172.
“…And yet, Guinot and Van Bakel (2020a) expressed the opinion that the intestinal spine in E. ricei may actually be a pleonal spine. Euprognatha (e.g., E. rastellifera and E. limatula Santana and Tavares, 2008;Fig. 4.5, 4.6) further differs from Willinachoides n. gen. in having a prominent spine on the mesobranchial and intestinal regions in some of its species, both of such spines absent in Willinachoides n. gen., and in the absence of a distinct tubercle in the furrow that delimits the cardiac region laterally (present in E. ricei).…”
Section: Methodsmentioning
confidence: 95%
“…Figure 4.Recent Inachoididae. ( 1 ) Inachoides lambriformis (De Haan, 1839), male, cl 15.4 mm, cw 12.0 mm (MCZ 1837); ( 2 ) Paradasygyius depressus (Bell, 1835), male, cl 26 mm, cw 21.2 mm (MZUSP 19261); ( 3 ) Paulita tuberculata (Lemos de Castro, 1949), cl 19 mm, cw 17.2 mm (MZUSP 22543); ( 4 ) Collodes granosus Stimpson, 1860, ovigerous female, cl 9.8 mm, cw 8.6 mm (USNM 55766); ( 5 ) Euprognatha rastellifera Rathbun, 1894, male holotype, cl 9.9 mm, cw 7.4 mm (USNM 18108); ( 6 ) Euprognatha limatula Santana and Tavares, 2008, male holotype, cl 8.5 mm, cw 7.0 mm (MZUSP 16940). V–VIII, fifth to eighth thoracic pleurites.…”
The spider crabs Willinachoides santanai n. gen. n. sp. from the early-middle Miocene of north Brazil and Paradasygyius rodriguezi n. sp. from the late Miocene of Venezuela are described and illustrated. Additionally, Eoinachoides senni Van Straelen, 1933, from the late Oligocene–early Miocene of Venezuela, is redescribed based on photographs of the holotype, and the diagnosis of Eoinachoides latispinosus Carriol, Muizon, and Secretan, 1987, from the late Miocene of Peru, is emended also on the basis of photographs of the holotype. The past distribution points to a Tethyan background for the current amphi-American Inachoididae, with the oldest fossil species known from the early Eocene Tethyan regions (Pakistan and Italy), and from the late Eocene–late Pliocene of the Americas. The high number of monotypic genera in Inachoididae could be the result of rapid dispersion followed by diversification during the Neogene of the tropical America, facilitated by global and regional events (e.g., eustatic sea level changes, the Mi-1 Oligocene-Miocene boundary global cooling, the global warming period of the Middle Miocene Climate maximum, closure of the Panama Isthmus, and marine incursions into the Amazon Basin). The shoaling and final closure of the Central American Seaway are thought to have critically affected the evolution of the inachoidids and shaped their current distribution patterns.
UUID: http://zoobank.org/6275fdc4-4bfa-4873-9320-3143d4915172.
“…The discovery of several unique characters in Paradasygyius, also found in a number of American genera originally assigned to Inachinae MacLeay, 1838, had led to the grouping of these American genera in a same taxon, the Inachoididae Dana, 1851, rehabilitated by Drach & Guinot (1982: 715-720;1983: 37-42) and Guinot (1984: 378-381). The Inachoididae was listed with 10 genera by Ng et al (2008: 115) and Ahyong et al (2011: 187 Garth, 1958;Pyromaia Stimpson, 1871. The more obvious inachoidid character, that is the dorsal exposure of pleurites 5-8 and of the first abdominal somite (the first at least or more; see below), often pointed or ending in a spine, is clearly shown in the figures by Melo (1996, as Inachoidinae) and Hendrickx (1999) for several inachoidid taxa, by Lemaitre et al (2001) for Pyromaia, and by Santana & Tavares (2008) for Euprognatha Stimpson, 1871. The result of the exposure of pleurites 5-8 is the insertion of the carapace into a setting gutter, marking the separation between the covered internal portion of the pleurites and their uncovered latero-external portion, which is calcified and ornamented like the carapace.…”
Section: Remarks On the Inachoididae Dana 1851mentioning
A new inachoidid genus Paulita n. gen. is established for Paradasygyius tuberculatus (Lemos de Castro, 1949), from thewestern Atlantic. Paulita tuberculata (Lemos de Castro, 1949) n. comb. differs from Paradasygyius depressus (Bell,1835), from the eastern Pacific, the type species and only remaining species of Paradasygyius Garth, 1958, by a numberof characters mainly related to the carapace, thoracic sternum, abdomen, and first gonopod. Paulita n. gen. shares the di-agnostic characters of Inachoididae Dana, 1851, in particular the latero-external parts of pleurites 5–8 that extend beyondeach side of the carapace and are calcified and ornamented like the carapace, resulting in the insertion of the carapace intoa setting gutter. Stenorhynchus Lamarck, 1818, is transferred from Inachidae to Inachoididae, and the subfamily Steno-rhynchinae Dana, 1851, is resurrected. Inachoididae now consists of at least two subfamilies: Inachoidinae Dana, 1851,and Stenorhynchinae, whereas the status of Salaciinae H. Milne Edwards & Lucas, 1842, remains uncertain. The status ofseveral other American genera traditionally included in Inachidae is discussed, leading to the recognition of the followingsubfamilies besides the Inachinae emend.: Podochelinae Neumann, 1878, which is here resurrected, Anomalopodinae Stimpson, 1871, and perhaps also Eucinetopinae Števčić, 2005.
A new species of deep-water brachyuran crab, Robertsella meridionalis, from Brazil is described and illustrated. The new species can be easily separated from its northwestern Atlantic counterpart, R. mystica Guinot, 1969, by a suite of carapace and appendage characters. Robertsella mystica is redescribed and illustrated. Putative sound-producing structures in the genus Robertsella are first described.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
