Terebella turgidula Ehlers, 1887

Londoño-Mesa, Mario H., 2009, Terebellidae (Polychaeta: Terebellida) from the Grand Caribbean region 2320, Zootaxa 2320 (1), pp. 1-93 : 63-64

publication ID

https://doi.org/ 10.11646/zootaxa.2320.1.1

DOI

https://doi.org/10.5281/zenodo.5324818

persistent identifier

https://treatment.plazi.org/id/03F75303-AE60-FF81-FF7E-FA633D8587B5

treatment provided by

Felipe

scientific name

Terebella turgidula Ehlers, 1887
status

 

Terebella turgidula Ehlers, 1887 View in CoL

Figures 18 View FIGURE 18 D-J

Terebella turgidula, Ehlers, 1887:241–245 View in CoL , Pl. 52. Figs.1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 .— Treadwell, 1901:198.

(Not Eupolymnia crassicornis, Hessle, 1917:178 View in CoL .— Augener, 1925:37.— Hartman, 1939:18.— Rullier, 1974:67).

Type material: Holotype MCZ 846 About MCZ Key West, Florida, US Coast Survey, Gulf of Mexico "Blake Exp. 1877– 78".

Description: Holotype complete, with 140 segments, 210mm long, thorax 52mm long, 23mm wide at segment 5 ( Fig. 18D View FIGURE 18 ). Abdomen 1.4mm wide on segment 30 and 0.4mm wide in the last segment. Body dark brown. Tentacular membrane short, with rounded edge. Eyespots absent. Tentacles dark brown, long. Upper lip short, semi-circular. Lower lip wide, swollen. Fifteen ventral shields, swollen; first shield wide, short, decreasing in width to reduced last shield ( Fig. 18E View FIGURE 18 ). Ventral groove from segment 16 to posterior end, deeper in posterior thoracic region, shallower in abdomen. Three pairs of dichotomous branched branchiae, decreasing in length gradually. Nephridial papillae not seen. Twenty-seven pairs of notopodia. Notochaeta of two lengths ( Fig. 18F View FIGURE 18 ), bilimbate medially, serrated, smoothly oblique distally ( Figs 18G,H View FIGURE 18 ). Limbation wider at base, terminating before oblique region. Thoracic neuropodia wider, swollen; abdominal neuropodia short, narrow and swollen. Uncini ( Figs 18I,J View FIGURE 18 ) MF:3:1–2:1; MF long and stout; Cp with decreasing accessory teeth, teeth on first row as long as one third the MF; Oc convex behind the Cp, and concave in lower region; PP rounded; PF absent; Bs convex; AP projected and rounded, curved downward; AF absent; USr and LSr flattened; SrP short and triangular, near to MF tip; SrA absent. Pygidium smooth and wide.

Discussion: Hessle (1917) indicated that Terebella turgidula could be placed in Polymnia , but without any comment. Later, Augener (1925) considered this species to be a junior synonym of Eupolymnia crassicornis (as Terebella crassicornis Schmarda, 1861 ), because of the type of uncini present. However, T. turgidula has notochaetae distally serrated, while E. crassicornis has smooth-tipped notochaetae, uncini in double rows only in the thorax, and possibly 17 thoracic chaetigers, according to Augener (1925). Therefore, these two species are different and both are valid. On the other hand, Ehlers (1887) described T. turdigula as having 18 thoracic segments with notochaetae, but the type specimen actually has 27 thoracic chaetigers (pers. obs.).

Type locality Key West , Florida, USA .

Distribution: Key West, Florida and Porto Rico.

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Terebellida

Family

Terebellidae

Genus

Terebella

Loc

Terebella turgidula Ehlers, 1887

Londoño-Mesa, Mario H. 2009
2009
Loc

Terebella turgidula, Ehlers, 1887:241–245

Treadwell, A. L. 1901: 198
Ehlers, E. 1887: 245
1887
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