-83.91, 9.71: 10 Treatments

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Cyclocaccus costaricensis   new species  Hisamatsu, Sadatomo, Bayless, Victoria M. & Carlton, Christopher E., 2016, Revision ofCyclocaccusSharp (Coleoptera: Nitidulidae: Nitidulinae), The Coleopterists Bulletin 70 (4), pp. 825-870: 825-870 825-870
Osbornellus aielloae   sp. nov.  Domínguez, Edwin & Godoy, Carolina, 2010, Taxonomic review of the genus Osbornellus Ball (Hemiptera: Cicadellidae) in Central America 2702, Zootaxa 2702, pp. 1-106: 19-22 19-22
Coniceromyia diffusa   sp. nov.  Ament, Danilo César, Kung, Giar-Ann & Brown, Brian V., 2020, Forty-one new species of Coniceromyia Borgmeier (Diptera: Phoridae), an identification key, and new distributional records for the species of the genus, Zootaxa 4830 (1), pp. 1-61: 20-21 20-21
Phyllocnistis drimiphaga   sp. n.  Kawahara, Akito Y., Nishida, Kenji & Davis, Donald R., 2009, Systematics, host plants, and life histories of three new Phyllocnistis species from the central highlands of Costa Rica (Lepidoptera, Gracillariidae, Phyllocnistinae), ZooKeys 27 (27), pp. 7-30: 12-17 12-17
Blepharoneura macwilliamsae   new species  Norrbom, Allen L. & Condon, Marty, 2010, Revision of the femoralis group of Blepharoneura Loew (Diptera: Tephritidae) 2374, Zootaxa 2374 (1), pp. 1-139: 79-81 79-81
Embates uniformis   sp. n.  Prena, Jens, 2005, The Middle American species of Embates Chevrolat (Coleoptera: Curculionidae: Baridinae), Zootaxa 1100 (1), pp. 1-151: 1-151 1-151
Embates polymorphus subsp. altrimsecus   ssp. n.  Prena, Jens, 2005, The Middle American species of Embates Chevrolat (Coleoptera: Curculionidae: Baridinae), Zootaxa 1100 (1), pp. 1-151: 1-151 1-151
Embates galbinus   sp. n.  Prena, Jens, 2005, The Middle American species of Embates Chevrolat (Coleoptera: Curculionidae: Baridinae), Zootaxa 1100 (1), pp. 1-151: 1-151 1-151
Gymnopus foliiphilus subsp. var. var. costaricensis   var. nov.  Petersen, Ronald H. & Hughes, Karen W., 2016, Micromphale sect. Perforantia (Agaricales, Basidiomycetes); Expansion and phylogenetic placement, MycoKeys 18, pp. 1-122: 27-30 27-30
Costarina chonta   new species  Platnick, Norman I., Berniker, Lily & Víquez, Carlos, 2014, The Goblin Spider Genus Costarina (Araneae, Oonopidae), Part 2: the Costa Rican fauna, American Museum Novitates 2014 (3794), pp. 1-76: 66-67 66-67