Autolytus pseudosimplex Augener, 1924

Nygren, Arne, 2004, Revision of Autolytinae (Syllidae: Polychaeta)., Zootaxa 680, pp. 1-314: 160

publication ID

10.5281/zenodo.157809

publication LSID

lsid:zoobank.org:pub:471A4E52-4C92-44F8-AB38-CD03071C0067

persistent identifier

http://treatment.plazi.org/id/03CDB626-CCE8-4EBF-FEE8-7C2D89AF877A

treatment provided by

Plazi

scientific name

Autolytus pseudosimplex Augener, 1924
status

 

Autolytus pseudosimplex Augener, 1924  (Fig. 82 A –C)

Autolytus (Proceraea) simplex Verrill, 1900: 630  .

Autolytus pseudosimplex  nom. n. Augener, 1924 c: 44.

Material examined. Bermuda: holotype on slide YPMAbout YPM 24277 / 24288.

Description. Holotype complete in poor condition; length 5 mm for 58 chaetigers, width 0.25 mm. Preserved material without colour markings. Ciliation not possible to assess.

Prostomium not possible to evaluate. Four eyes, with lenses, in trapezoid arrangement, anterior pair larger. Eyes separated; eyes spots absent. Palps not possible to separate from prostomium. Nuchal epaulettes not possible to assess.

Anterior appendages and all dorsal cirri in poor condition, not possible to evaluate. Cirrophores not possible to assess.

Parapodial lobes not possible to evaluate. Anterior chaetigers with 2 aciculae, 1 in posterior. Chaetal fascicle with 6–8 compounds in anterior chaetigers, 4–6 in median and posterior. Compound chaetae with small distal tooth (Fig. 82 B). Single thin bayonet chaetae (Fig. 82 C), subdistally denticulated, beginning at chaetiger 40.

Pharynx sinuation not possible to assess. Trepan in chaetiger 5 with 16–20 equal teeth (Fig. 82 A). Basal ring present; infradental spines present (Fig. 82 A). Proventricle equal in length to 4–5 segments in chaetiger 11–14 with 30–32 rows of square shaped muscle cells. Two anal cirri equal to half body width.

Additional information from literature. Verrill describes the antennae as equal to c. 3–4 times prostomial length; dorsal tentacular cirri, first and second dorsal cirri to be twice as long; ventral tentacular cirri to be about equal to antennae; succeeding dorsal cirri are short, from 1 / 6 to 1 / 2 the body width. The pharynx is folded. Bases of parapodia are dark coloured, but it is not clear if this observation is done using direct or transmitting light; it may well be the parapodial glands as seen in light microscope.

Reproduction. Schizogamy according to Verrill. He describes a specimen with a developing stolon at the 40 th segment, 21 segments long, full of eggs. This could not be confirmed in the type, but perhaps Verrill observed this in another specimen.

Habitat. Unknown.

Distribution. North West Atlantic. Bermuda. Only known from type locality.

Remarks. Autolytus pseudosimplex  is only known from this single individual in very poor state, and with present material it is not feasible to determine its status. It may be synonymous with other Myrianida  taxa with c. 16–20 equal teeth in its trepan, including M. australiensis  , M. brevipes  , M. edwarsi  , M. quindecimdentata  , and M. spinoculata  . Autolytus pseudosimplex  is currently insufficiently known, and is here referred to as Myrianida incertae sedis  .

YPM

Peabody Museum of Natural History

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Phyllodocida

Family

Syllidae

Genus

Autolytus

Loc

Autolytus pseudosimplex Augener, 1924

Nygren, Arne 2004

2004
Loc

Autolytus pseudosimplex

Augener 1924: 44

1924
Loc

Autolytus (Proceraea) simplex

Verrill 1900: 630