Topic
Rotularia
About: Rotularia is a research topic. Over the lifetime, 3 publications have been published within this topic receiving 22 citations.
Papers
TL;DR: Among Polychaete annelids, calcareous tubes occur in Serpulidae, Spirorbidae, Sabellidae, and Cirratulidae (Perkins, 1991; Fischer et al., 2000).
Abstract: Among polychaete annelids, calcareous tubes occur in Serpulidae, Spirorbidae, Sabellidae, and Cirratulidae (Perkins, 1991; Fischer et al., 2000). The tubes of most serpulids are completely or partially cemented to the substrate. The fossil genus Rotularia has a peculiar unattached, spirally coiled tube, thus well distinguishable from the other known serpulids. Tube records of Rotularia are known from Mesozoic (Late Jurassic) (Ball, 1960; Stevens, 1967) to Early Tertiary sediments, becoming very common during the Cretaceous and Eocene (see Savazzi, 1995). It also has a global distribution (Wrigley, 1951; Ball, 1960; Keen, 1961; Regenhardt, 1961; Howell, 1962; Stevens, 1967; Chiplonkar and Tapaswi, 1973; Ware, 1975; Lommerzheim, 1979; Macellari, 1984; Jager, 1993).
Owing to the peculiar shape of Rotularia , many authors in the past interpreted it as a vermetid gastropod (e.g., Bronn, 1827; Schauroth, 1865; Stoliczka, 1868; Whitfield, 1890; Rovereto, 1904; Cossmann, 1912; Doncieux, 1926; Rutsch, 1939; Wenz, 1943). Serpulid identification has been definitively confirmed by recent observations on the tube structures (Accorsi Benini and Ungaro, 1989; Savazzi, 1995). All rotularias were cemented to the substrate during their earliest growth stage, but they became detached shortly after the formation of first whorls (Savazzi, 1995). Their tubes have two layers (Schmidt, 1955; Ball, 1960; Savazzi, 1995), the thin inner layer composed of lamellae subparallel to the inner shell surface and the thick outer layer with chevron shaped growth lamellae.
The tube ultrastructure of Recent serpulid polychaetes has been recently studied by various authors (Bubel et al., 1983; ten Hove and Zibrowius, 1986; Zibrowius and ten Hove, 1987; ten Hove and Smith, 1990; Nishi, 1993; Weedon, 1994; Aliani et al., 1995; Sanfilippo and Mollica, …
21 citations
TL;DR: It is hypothesized that individuals of Calappilia crossed the Central American Seaway prior to the closure of the Isthmus of Panama and they also migrated across the Tethys Sea, suggesting dispersal well into the Southern Hemisphere by the Miocene.
Abstract: Members of the family Calappidae, or box crabs, date back to at least the Eocene, with Calappilia being the most species-rich calappid genus in the fossil record. The European species of Calappilia were reviewed recently, but less work has been done lately on the American species. We describe Calappilia calculosa n. sp. based on carapaces originating from the uppermost Eocene to lowermost Oligocene Rotularia vernoni Zone (Priabonian-Rupelian) in Suwannee County, Florida, USA. The new species is the youngest member of the genus in North America thus far. We further discuss some other occurrences of Calappilia that includes reassigning Calappilia ocalanus (Ross, Lewis and Scolaro, 1964) to Calappa , in part to better interpret the paleobiogeography of Calappilia . A worldwide paleobiogeographic analysis of Calappilia suggests that the genus first appeared in North America or Europe in the early Cenozoic. Rapid dispersal and radiation seem to have occurred in the Eocene because Calappilia is also reported from Eocene sediments of the Pacific side of Mexico and Indonesia. We hypothesize that individuals of Calappilia crossed the Central American Seaway prior to the closure of the Isthmus of Panama and they also migrated across the Tethys Sea. Miocene occurrences are known from Brazil, Chile, Australia, and New Zealand, suggesting dispersal well into the Southern Hemisphere by the Miocene. Quaternary occurrences have not been confirmed thus far.
6 citations
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| Year | Papers |
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| 2018 | 1 |
| 2016 | 1 |
| 2008 | 1 |