Paleocommunities of the Yorktown Formation (Pliocene) of Virginia

Species	Total Specimens	Samples Occurence
Bivalvia
Abra subreflexa	268	66
Anomia simplex	18	11
Astarte concentrica	149	24
Astarte undulata	454	82
Bornia triangula	6	5
Carditermera arata	42	16
Carolinapecten eboreus	154	55
Chama congregata	3224	75
Chesacardium aquelitactretaum	51	31
Chesapecten madisonius	549	114
Chione cribraria	7	5
Chione grus	1	1
Cochlodesma antiqua	7	6
Corbula cuneata	630	84
Corbula inaequalis	738	105
Corbula retusa	487	95
Crassinella lunulata	38	25
Ctena speciosa	20	10
Cumingia tellenoides	1	1
Cyclocardia granulata	1241	66
Diplodonta leana	15	9
Diplodonta sp.A	9	4
Diplodonta sp.B	3	3
Divalinga quadrisulcata	6	5
Dosinia acetabulum	846	103
Ensis directus	182	84
Gemma magna	71	17
Glossus sp.	4	3
Glycymeris americana	167	43
Glycymeris subovata	2	2
Hemimactra duplinensis	17	10
Leptomactra dolombus	2	21
Lucinisca cribrarius	29	67
Lyropecten sp.	278	8
Macoma virginiana	181	72
Macrocallista reposta	25	10
Marvcrassatella undulata	280	82
Mercenaria campechiensis	228	46
Modiolus sp.	28	25
Mulinia congesta	11282	117
Mytilus sp.	2	2
Noetia incile	192	54
Nucula proxima	53	33
Ostrea ravaneliana	40	17
Ostrea sculpturata	1760	124
Pandora sp.A	109	61
Pandora sp.B	2	2
Pandora sp.C	1	1
Panopea reflexa	74	34
Parvilucina multilineatus	365	90
Petricola grinelli	4	4
Pitar sayana	44	12
Pitar sp.B	6	2
Pleiorytis centenaria	6	6
Plicatula marginata	700	50
Pododemus sp.	4	2
Pseudochama corticosa	14	9
Pteromeris perplana	14	7
Pycnodnte sp.	201	23
Saxicava sp.	23	16
Scapharca scalariais	2	2
Semele sp.A	250	92
Spisula similis	19	13
Spisula sp.A	1	1
Spisula sp.B	1	1
Stewartia anodonta	24	14
Striarca centenaria	52	6
Thrachia conradi	2	1
Yoldia laevis	874	95
unknown bivalve 1	2	2
unknown bivalve 3	1	1
unknown bivalve 4	1	1
unknown bivalve 5	1	1
unknown bivalve 6	1	1
unknown bivalve 7	1	1
Gastropoda
Anachis sp.	3	3
Architectonica nupera	3	3
Busycon sp.	9	7
Calliostoma mitchelli	52	32
Calliostoma virginicum	22	18
Cancellaria rotunda	1	1
Crepidula adunca	1	1
Crepidula costata	1445	112
Crepidula plana	64	26
Crepidula sp.A	5	3
Crucibulum grandis	38	14
Crucibulum leanum	65	36
Crucibulum scutellatum	51	24
Dentimargo aureocincta	2	1
Diodora catelliformis	16	14
Diodora redimicula	7	7
Drilla sp.A	24	19
Drilla sp.B	16	13
Ecphora quadricostata	29	27
Epitonium sp.	1	1
Eupleura caudata(juv.)	33	27
Fiscus papyratia	5	4
Fossarus liri	6	6
Fusinus exilis	58	33
Longchaetes suturalis	4	4
Lunatia heros	97	45
Lyrosoma sulcosa	4	3
Marginella denticulata	1	1
Mitrella gardnerae	13	9
Nassarius sp.	5	4
Oliva canaliculata	10	5
Polinices duplicata	7	5
Pterorhytis umbrifir	7	7
Ptychosalpinx multirugata	22	12
Pyrgospira tricatenaria	8	6
Scalospira strumosa	6	5
Scaphella sp.	1	1
Serpulorbis graniforma	21	21
Terebra carolinensis	3	2
Terebra sp.A	14	11
Turritella sp.	117	117
Urosalpinx sp.	2	2
Urosalpinx stimpsoni	28	15
Urosalpinx trossula	4	4
Uzita sp.	1	1
unknown gastropod 1	1	1
unknown gastropod 4	2	2
unknown gastropod 5	2	2
Polyplachophora
unit. chiton	6	6
Scaphopoda
Dentalium sp.	100	99
Acrotretida
acrotretids	19	19
Cirripedia
barnacles	142	142
Bryozoa
bryozoans	106	106
Scleractinia
corals	60	60
Decapoda
crab and lobster claws	23	23
Echinoidea
echinoid spines and plates	59	59
Lingulida
unit. lingulid	9	9
Vertebrata
vertebrate bones and teeth	32	32
Totals	28,878	142

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