Phacops

Phacops is a genus of trilobite in the order Phacopida, family Phacopidae, that lived in Europe and North America in the Silurian and Devonian periods.[2] It was a rounded animal, with a globose head and large eyes,[2] and probably fed on detritus.[3] Phacops is often found enrolled, a biological defense mechanism that is widespread among smaller trilobites but nearly perfected by this genus.

Species
Phacops contains the following species:
 * P. accipitrinus (Phillips, 1841)[4]
 * P. algericus Alberti, 1983
 * P. breviceps Barrande, 1846
 * P. chlupaci Alberti, 1983
 * P. circumspectans Paeckelmann, 1913
 * P. degener Barrande, 1852
 * P. fragosus Struve, 1970[5]
 * P. granulatus (Munster, 1840) synonym P. posidoniae[6]
 * P. hoseri Hawle & Corda, 1847
 * P. iowensis Delo, 1935[7]
 * P. imitator Struve, 1970[5]
 * P. kockeli Alberti, 1968
 * P. latifrons (Bronn, 1825)[5]
 * col2=
 * P. maurulus
 * P. modestus Barrande
 * P. platilegnotor
 * P. rana (Green, 1832) synonyms Calymene bufo rana, Eldredgeops rana[8]
 * P. salteri Kozlowski, 1923
 * P. sartenaeri Struve, 1985[5]
 * P. schlotheimi (Bronn, 1825)[9]
 * P. sobolevi Kielan, 1954
 * P. speculator
 * P. sternbergi
 * P. turco Richter & Richter
 * P. wedekindi Richter & Richter, 1926[6]
 * P. zinkeni F.A. Roemer, 1843

Species previously assigned to Phacops
A number of species previously assigned to the genus Phacops have since been transferred to other genera:
 * P. acuticeps = Acuticryphops acuticeps
 * P. arcticus = Acernaspis arctica
 * P. asper = Ananaspis aspera
 * P. birdsongensis = Paciphacops birdsongensis
 * P. braziliensis = Phacopina braziliensis
 * P. bronni = Reedops bronni
 * P. bulliceps = Eophacops bulliceps
 * P. caecus = Trimerocephalus caecus
 * P. caffer = Metacryphaeus caffer
 * P. claviger = generic assignment uncertain
 * P. constrictus = Acastoides constrictus
 * P. coronatus = Heliocephalus coronatus
 * P. cristatus bombifrons = Viaphacops bombifrons 
 * P. cristatus cristatus = Viaphacops cristatus
 * P. crossleii = Paciphacops crossleii
 * P. cryptophthalmoides = Trimerocephalus cryptophthalmoides
 * P. cryptophthalmus = Cryphops cryptophthalmus
 * P. cultifrons = Eophacops trapeziceps
 * P. dagincourti = Bouleia dagincourti
 * P. downingiae var. α. vulgaris = Acaste downingiae
 * P. downingiae var. β. macrops = Acastocephala macrops
 * P. downingiae var. γ. inflatus = Acaste inflata
 * P. fecundus = Ananaspis fecunda
 * P. glaber = Eophacops glaber
 * P. glockeri = Phacopidella glockeri
 * P. handwerki = Eophacops handwerki
 * P. hudsonicus= Paciphacops hudsonicus
 * P. incisus = Nephranops incisus
 * P. khatangensis = Acernaspis khatangensis
 * P. kayseri = Eocryphops kayseri
 * P. lacunosus = Trimerocephalus lacunosus
 * col2=
 * P. latigenalis = Paciphacops latigenalis
 * P. lentiginosus= Trimerocephalus lentiginosus
 * P. limbatus = Dianops limbatus
 * P. logani = Paciphacops logani
 * P. lopatini = Monorakos lopatini
 * P. mancus = Eophacops mancus
 * P. marklandensis = Acernaspis marklandensis
 * P. mastophthalmus = Trimerocephalus mastophthalmus
 * P. metacernaspis = generic assignment uncertain
 * P. michelini = Pseudocryphaeus michelini
 * P. musheni = Eophacops musheni
 * P. nudus = generic assignment uncertain
 * P. ocellus = Hadrorachus ocellus
 * P. orestes = Acernaspis orestes
 * P. orientalis = Ananaspis orientalis
 * P. parabolus = Phillipsinella parabola
 * P. phillipsi = Kloucekia phillipsi
 * P. primaevus = Acernaspis primaeva
 * P. pulcellus = Acernaspis pulcella
 * P. quadrilineatus = Acernaspis quadrilineata
 * P. raymondi = Kainops raymondi
 * P. serratus = Paciphacops serratus
 * P. socialis = Dalmanitina socialis
 * P. sphaericeps = Dereimsia sphaericeps
 * P. steinachensis = Trimerocephalus steinachensis
 * P. stellifer = Greenops (Neometacanthus) stellifer
 * P. stokesii = generic assignment uncertain
 * P. straitonensis = Podowrinella straitonensis
 * P. trapeziceps = Eophacops trapeziceps
 * P. veles = Kainops veles
 * P. vodorezovi = Trimerocephalus vodorezovi
 * P. volborthi = Denckmannites volborthi