2011: D.B. Blake & R.W. Portell. Kionaster petersonae, n. gen. and sp. (Asteroidea), the first fossil occurrence of the Asterodiscididae, from the Miocene of Florida. Swiss Journal of Paleontology, 130(1): 25-42. DOI: 10.1007/s13358-010-0005-0.

R.W. Portell & R.C. Hulbert. Haile Quarries Fieldguide, Newberry, Florida. Southeastern Geological Society, Annual Field Trip Guidebook 53. 24 p.

2009: D.B. Blake & R.W. Portell. Implications for the study of fossil Asteroidea (Echinodermata) of new genera and species from the Eocene of Florida. Journal of Paleontology, 83(4): 562-574.

K.E. Burdette, W.J. Rink, G.H. Means & R.W. Portell. Optical dating of the Anastasia Formation, northeastern Florida, USA. Southeastern Geology, 46(4): 173-185.

Hendricks,J.R., R.W. Portell, G.L. Polites. An aberrant sinistral Conus (Neogastropoda: Conidae) from the Miocene of Florida, USA. The Nautilus, 123(4): 317-318.

S.K. Donovan & R.W. Portell. Reply to discussion of Campanile trevorjacksoni sp. nov.^† (Mollusca: Gastropoda) from the Eocene of Jamaica: At last, a name for the first fossil used in intercontinental biostratigraphic correlation (de la Beche 1827). Geological Journal, 44: 497-499.

J.B. Martin & R.W. Portell. Field trip guide: A brief introduction to the geology, hydrology and natural history of north central Florida, pp. 43-49. In A.S. Engle & S.A. Engle (eds.). Select field guides to cave and karst lands of the United States. Karst Waters Institute Special Publication, 15.

J.S.H. Collins, R.W. Portell & S.K. Donovan. Decapod crustaceans from the Neogene of the Caribbean: Diversity, distribution and prospectus. Scripta Geologica, 138:55-111.

2008: R.W. Portell, G. Hubbell, S.K. Donovan, J.L. Green, D.A.T. Harper, R. Pickerill. Miocene sharks in the Kendeace and Grand Bay formations of Carriacou, The Grenadines, Lesser Antilles. Caribbean Journal of Science, 44(3):279-286.

R.W. Portell & S.K. Donovan. Campanile trevorjacksoni sp. nov.^† (Mollusca: Gastropoda) from the Eocene of Jamaica: At last, a name for the first fossil used in intercontinental biostratigraphic correlation (de la Beche 1827). Geological Journal, 43:542-551.

R.W. Portell & R.C. Hulbert. Haile Complex, pp. 286-289. In: L.J. Florea (ed.). Caves and Karst of Florida: A guidebook for the 2008 NSS National Convention. National Speleological Society, Huntsville, AL, 302 pp.

J.R. Hendricks & R.W. Portell. Late Eocene Conus (Neogastropoda: Conidae) from Florida, USA. The Nautilus, 122(2):79-93.

T.A. Jackson, P.W. Scott, S.K. Donovan, R.K. Pickerill, R.W. Portell & D.A.T. Harper. The volcaniclastic turbidites of the Grand Bay Formation, Carriacou, Grenadines, Lesser Antilles. Caribbean Journal of Science, 44(1):116-124.

2007: S.K. Donovan, R.W. Portell & D.P. Domning. Contrasting patterns and mechanisms of extinction during the Eocene-Oligocene transition in Jamaica, pp. 247-273. In: W. Renema (ed.). Biogeography, Time and Place: Distributions, Barriers and Islands. Springer, 420 p.

G.W. Schmelz & R.W. Portell. The Epitoniidae (Gastropoda: Ptenoglossa) from the lower Alum Bluff Group (lower to middle Miocene) of Florida, with description of nine new species. The Nautilus, 121(3):105-130.

R.M. Feldmann & R.W. Portell. First report of Costacopluma Collins and Morris, 1975 (Decapoda: Brachyura: Retroplumidae) from the Eocene of Alabama, U.S.A. Journal of Crustacean Biology, 27(1):90-96.

F.L. Pirkle, F.J. Rich, J.G. Reynolds, T.A. Zayac, W.A. Pirkle & R.W. Portell. The geology, stratigraphy, and paleontology of Reids, Bells, and Roses bluffs in northeastern Florida. Guide to Fieldtrips – 56^th Annual Meeting, G.S.A. S.E. Sect. & Department of Geology and Geography Contribution Series, Georgia Southern University, 1:137-151.

2005: S.K. Donovan, R.W. Portell & C.J. Veltkamp. Lower Miocene echinoderms of Jamaica, West Indies. Scripta Geologica, 129:91-135.