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Hormotoma gracilis

Gastropoda - Murchisoniina - Hormotomidae

Taxonomy
Murchisonia gracilis was named by Hall (1847). It is not extant. It is the type species of Hormotoma.

It was recombined as Murchisonia (Hormotoma) gracilis by Salter (1859) and Knight et al. (1960); it was recombined as Hormotoma gracilis by Ulrich and Scofield (1897), Foerste (1923), Knight (1941), Wilson (1951), Liberty (1969) and Wagner (1999).

Subspecies
H. angustata, H. angustatus, H. goodhuensis, H. multivolvis, H. sublaxa
Sister species lacking formal opinion data
H. kutsingensis

Synonymy list
YearName and author
1847Murchisonia gracilis Hall pp. 181; 303 figs. pl. 39 f. 4a-c; pl. 83 f. 1a-b
1859Murchisonia (Hormotoma) gracilis Salter p. 22
1897Hormotoma gracilis Ulrich and Scofield pp. 1014 - 1015 figs. pl. 70 f. 18-21, ?22
1923Hormotoma gracilis Foerste p. 80
1941Hormotoma gracilis Knight p. 152 figs. pl. 45 f. 2a-c
1951Hormotoma gracilis Wilson p. 41 figs. pl. 4 f. 15; text f. 1.6
1960Murchisonia (Hormotoma) gracilis Knight et al. p. 291 fig. f.190.3
1969Hormotoma gracilis Liberty
1999Hormotoma gracilis Wagner

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classGastropoda
subclassOrthogastropoda
orderMurchisoniina
superfamilyMurchisonioidea()
familyHormotomidae
genusHormotoma()
speciesgracilis()

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Hormotoma gracilis Hall 1847
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†Hormotoma gracilis goodhuensis Ulrich and Scofield 1897
†Hormotoma gracilis multivolvis Ulrich and Scofield 1897
†Hormotoma gracilis sublaxa Ulrich and Scofield 1897
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: aragoniteo
Entire body: yessubg
Adult length: 10 to < 100subg
Adult width: 10 to < 100subg
Adult height: 10 to < 100subg
Folds: nonesubg
Ribbing: minorsubg
Spines: nonesubg
Internal reinforcement: nonesubg
Locomotion: actively mobilesubg
Life habit: epifaunalsubg
Diet: herbivoresubg
Vision: limitedo
Created: 2004-10-20 01:59:43
Modified: 2004-10-20 03:59:43
Source: subg = subgenus, o = order
References: Aberhan et al. 2004, Bambach et al. 2007, Hendy 2009

Age range: base of the Migneintian to the top of the Richmondian or 485.40000 to 445.50000 Ma

Collections (114 total)


Time interval Ma Country or state Original ID and collection number
Migneintian485.4 - 478.6USA (Missouri) Hormotoma gracilis (50204)
Caradoc458.4 - 449.5USA (Wisconsin) Hormotoma gracilis (55651)
Caradoc458.4 - 449.5Canada (Ontario) Hormotoma gracilis (26275 26276)
Caradoc458.4 - 449.5USA (Georgia) Hormotoma gracilis (32614 32615 32617 32618 32619)
Late/Upper Ordovician458.4 - 443.8USA (New York) Hormotoma gracilis (346)
Turinian457.3 - 453.8Canada (Quebec) Hormotoma gracilis (174157 185349 185354)
Turinian457.3 - 453.8USA (Missouri) Hormotoma gracilis (175724 181091)
Turinian457.3 - 453.8USA (Wisconsin) Hormotoma gracilis (89018)
Turinian457.3 - 453.8USA (Indiana) Hormotoma gracilis (104277 194135)
Turinian457.3 - 453.8Canada (Ontario) Hormotoma gracilis (26174 26175 26188 184671 185429 185431 185449 185451 185465 185474)
Mohawkian457.3 - 451.0USA (New York) Hormotoma gracilis (104586 104587 104591 104594)
Mohawkian457.3 - 451.0USA (Minnesota) Hormotoma gracilis (167563)
Blackriveran457.3 - 449.6Canada (Quebec) Hormotoma gracilis (63816)
Blackriveran457.3 - 449.6Canada (Ontario) Hormotoma gracilis (100354)
Blackriveran457.3 - 449.6USA (Wisconsin) Hormotoma gracilis (416 417 168429)
Blackriveran457.3 - 449.6USA (Illinois, Iowa) Hormotoma gracilis (23612 23617 23619 23620) Hormotoma gracilis, Hormotoma angustata (23613 23614 23615)
Blackriveran457.3 - 449.6USA (New York) Hormotoma gracilis (173299)
Blackriveran457.3 - 449.6USA (Minnesota) Hormotoma gracilis (23081 23088) Hormotoma gracilis, Hormotoma angustata (23555 23556)
Blackriveran - Rocklandian457.3 - 449.6USA (Minnesota) Hormotoma gracilis (23557)
Blackriveran - Rocklandian457.3 - 449.6USA (Illinois, Iowa) Hormotoma gracilis (23621)
Kirkfieldian457.3 - 449.6Canada (Ontario) Hormotoma gracilis (26192)
Kirkfieldian457.3 - 449.6USA (Illinois, Iowa) Hormotoma gracilis (23623 23644)
Rocklandian457.3 - 449.6USA (Kentucky) Hormotoma gracilis (87737)
Rocklandian457.3 - 449.6Canada (Quebec) Hormotoma gracilis (154703)
Rocklandian457.3 - 449.6USA (Tennessee) Hormotoma gracilis (5346 87734)
Rocklandian - Kirkfieldian457.3 - 449.6USA (Minnesota) Hormotoma gracilis (23558)
Rocklandian - Kirkfieldian457.3 - 449.6USA (Illinois, Iowa) Hormotoma gracilis (23622)
Shermanian457.3 - 449.6USA (New York) Murchisonia gracilis (157341)
Shermanian457.3 - 449.6USA (Minnesota) Hormotoma gracilis (23092) Hormotoma gracilis, Hormotoma angustata (23579 23584)
Shermanian457.3 - 449.6Canada (Ontario) Hormotoma gracilis (26272)
Shermanian457.3 - 449.6USA (Tennessee) Hormotoma gracilis (5352)
Shermanian457.3 - 449.6USA (Illinois, Iowa) Hormotoma gracilis (23651 23653 23656) Hormotoma gracilis, Hormotoma angustata (23659 23664 23667 23668 23670)
Chatfieldian453.8 - 451.0Canada (Quebec) Hormotoma gracilis (185477)
Chatfieldian453.8 - 451.0Canada (Ontario) Hormotoma gracilis (26263 26267 26270 26271 26273 26277 185002 197156)
Katian453.0 - 445.2USA (Kentucky) Hormotoma gracilis (100246)
Edenian451.0 - 450.2Canada (Ontario) Hormotoma angustata (173252) Hormotoma gracilis (173253)
Edenian451.0 - 450.2USA (Minnesota) Hormotoma gracilis (23597) Hormotoma gracilis, Hormotoma angustata (23588)
Edenian451.0 - 450.2USA (Illinois, Iowa) Hormotoma gracilis (23679 23680) Hormotoma gracilis, Hormotoma angustata (23678)
Edenian - Maysvillian451.0 - 449.6USA (Illinois, Iowa) Hormotoma gracilis (23682)
Edenian - Maysvillian451.0 - 449.6Canada (Ontario) Hormotoma gracilis (26293 26294)
Edenian - Maysvillian451.0 - 449.6USA (Minnesota) Hormotoma gracilis (23603)
Maysvillian450.2 - 449.6USA (Illinois, Iowa) Hormotoma gracilis (23684)
Maysvillian450.2 - 449.6USA (Minnesota) Hormotoma gracilis (23607)
Maysvillian450.2 - 449.6Canada (Quebec) Hormotoma gracilis (155174)
Maysvillian450.2 - 449.6Canada (Québec) Hormotoma gracilis (173121)
Richmondian449.6 - 445.5Canada (Québec) Hormotoma gracilis (63728)
Richmondian449.6 - 445.5USA (Iowa) Hormotoma gracilis (172795)
Richmondian449.6 - 445.5Canada (Nunavut) Hormotoma gracilis (101984)
Richmondian449.6 - 445.5Canada (Quebec) Hormotoma gracilis (63559 63625 63660 63667 63675 172788)
Richmondian449.6 - 445.5USA (Michigan) Hormotoma gracilis (26313 26314 26315)
Gamachian449.5 - 443.7Canada (Québec) Hormotoma gracilis (63767 63773)