Part H, Brachiopoda, vol. 1 & 2, ch. 7, p. 728-864

Abstract

Shells transversely suboval in outline.nllm COOPER, Penn.(Gaptank F.), USA (Tex.) ; 2a, Cardinal process with well-developed shaft, latex replica ped.v. ext., X I; 2b, ped.v. into imdental sockets relatively small, lateral to pression, X2; 2c, brach.v. ext. mold, XI (180). cardinal process (180). Carb.-Perm.

Loop ontogeny of the Late Triassic (Norian) terebratulid brachiopodPseudorhaetina antimoniensisSandy from Sonora, Mexico and its taxonomic significance

“…As has been suggested before (Muir-Wood et al, 1965), the dielasmatid terebratulids, "holdovers" from the Paleozoic, are the group most likely to be ancestral to the "modern" terebra tulids. This is underscored by the fact that the dielasmatids are the only terebratulids known to have survived the Permo-Triassic extinctions.…”

“…The Rhynchonellida and Terebratulida both survived through from the end-Paleozoic extinctions, con tinued into the Mesozoic, and through to the present day. A number of superfamilies, families, and subfamilies of the order Terebratulida originated in the Triassic (e.g., Muir-Wood et al, 1965); a Triassic origin appears likely for the Terebratuloidea, the archetypal "modern" short-looped terebratulid brachiopod. In a revised terebratulid phylogeny by Endo et al (1994, figure 8) the superfamily Terebratelloidea, superfamily Terebratuloidea, and family Zeilleridae are indicated as ranging from the base of the Triassic.…”

“…This does not prove a direct evolutionary link, but does point to some similarities in aspects of loop development. Cloud (in Muir-Wood et al, 1965, figure 596) indicated the simiharity in cardinalia (hinge plates and crural bases) between the family Labaiidae (placed in the Dielasmatacea in Muir-Wood et al, 1965, but needs reconsideration, D. MacKinnon, personal com mun., 1997 and that of many Mesozoic terebratulids. This in terpretation was further supported by Pearson (1977, p. 42) who also considered that the Labaiidae provided the most likely root stock for the Mesozoic short-looped terebratulids.…”

Viés Analítico em Estudos Tafonômicos com Macroinvertebrados: Implicações (Paleo)Ambientais e (Paleo)Ecológicas

“…Pertence à ordem Terebratulida, cujo registro estratigráfi co remonta ao Devoniano (Muir-Wood et al, 1965). Suas valvas são endopontuadas, com baixa porcentagem de calcita magnesiana.…”

Brachial supporting structure of Spiriferida (Brachiopoda)

“…Studies of recent brachiopods have classified the shape of the lophophore into several types, such as ptycholophe, plectolophe, and spirolophe (Rudwick, 1962, 1970; Emig, 1992; Williams et al, 1997a). The spirolophe, in which the tips of the brachia diverge from each other to form a pair of freely coiled spirals, occurs in many modern inarticulates, rhynchonellides, and possibly the terebratulide genus Leptothyrella Muir-Wood in Muir-Wood et al, 1965 (Muir-Wood, 1965; Emig, 1992). This type of lophophore is also thought to have been present in fossil inarticulates, rhynchonellides, atrypides, athyridides, spiriferides, and spiriferinides (Rudwick, 1970).…”