Megalomma carunculata Tovar-Hernandez and Salazar-Vallejo 2008
Creators: name: Tovar-Hernández, María Ana
name: Carrera-Parra, Luis F.
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Carabidae
Megalomma
Megalomma carunculata

description: <i>Megalomma carunculata</i> Tovar-Hernández and Salazar-Vallejo, 2008 <i>Megalomma carunculata</i> Tovar-Hernández and Salazar-Vallejo, 2008: 1957–1961, Figs 1–2. <b>Type material examined.</b> Holotype <b>[LACM – AHF]</b> POLY 2169, Mexican Pacific, Guerrero, Acapulco, Punta Manzanillo, Coll. S. I. Salazar, August 4, 1988, 1 m. Additional material examined. [<b>ECOSUR]</b> OH-P281, Mexican Pacific, Guerrero, Acapulco, Hornos beach, 16° 51’ 6.4’’ N, 99° 54’ 1’’ W, Colls. S. I, Salazar &amp; L. F. Carrera, in sponge. <b>Diagnosis.</b> Eyes in most radioles (spherical and oval); dorsal margins of collar fused to faecal groove; caruncle present; thoracic and abdominal segments with interramal eyespots; thoracic chaetae Type B; abdominal chaetae narrowly hooded. <b>Additions to description.</b> Branchial crown as long as thorax. Subdistal compound eyes spherical in most radioles, oval in the ventralmost radioles. Dorsalmost radioles with short tips increasing gradually towards ventral radioles. Dorsal pinnular appendages present. Dorsal collar margins rounded posteriorly, fused to faecal groove. Dorsal pockets present. Anterior peristomial ring exposed dorsally between dorsal pockets. Lateral collar margins covering the basal union of radioles. Ventral lappets rounded, overlapping or not overlapping. Ventral sacs absent. Caruncle long, erect, triangular. Thoracic and abdominal segments with interramal purple eyespots: large in thorax then decreasing towards posterior abdomen. Thoracic tori longest in chaetigers 2–3. Tori in chaetiger 2–3 occupying the entire distance between notopodia and ventral shields margins. All ventral shields in contacting with torus. Inferior thoracic chaetae Type B. Handle of thoracic uncini 2x length of main fang. Companion chaetae with teardrop-shaped membranes. Abdominal chaetae narrowly hooded. Pygidium broadly rounded, without eyespots. BARCODE: A nucleotide sequence of 640 bp of the section of COI gene used for barcoding was obtained from one specimen collected from Acapulco, Guerrero, Mexican Pacific (ECOSUR OH-P281). <b>Remarks.</b> The original description provided by Tovar-Hernández and Salazar-Vallejo (2008) contains two mistakes. Firstly, eyes from dorsalmost radioles are spherical (not spiraled as in original description); secondly, middorsal collar margins are fused to faecal groove as grouped by Tovar-Hernández and Salazar-Vallejo (2008: 1962, Table 1) but not “not-fused” as originally described. Within <i>Megalomma</i>, <i>M</i>. <i>acrophthalmos</i>, <i>M. carunculata</i>, <i>M. lobiferum</i>, <i>M. pigmentum</i>, <i>M.</i> sp., and <i>M. quadrioculatum</i> are easy distinguishable from all others by having a caruncle. <i>Megalomma pigmentum</i> has eyes only in the dorsalmost radiolar pair and the dorsal collar margins are not fused to faecal groove (fused in the other five species). <i>Megalomma lobiferum</i> has eyes in all radioles; <i>M. quadrioculatum</i> has eyes only in 1–5 pairs of dorsal radioles and <i>M. acrophthalmos</i>, <i>M. carunculata</i> and <i>M.</i> sp., have eyes in most radioles. <i>Megalomma carunculata</i> and <i>M.</i> sp., have interramal eyespots (absent in <i>M. acrophthalmos</i>) but <i>M. carunculata</i> lack of dorsal lappets (present in <i>M. acrophthalmos</i> and <i>M.</i> sp.).
description: Published as part of <i>Tovar-Hernández, María Ana &amp; Carrera-Parra, Luis F., 2011, Megalomma Johansson, 1925 (Polychaeta: Sabellidae) from America and other world-wide localities, and phylogenetic relationships within the genus 2861, pp. 1-71 in Zootaxa 2861 (1)</i> on pages 18-19, DOI: 10.11646/zootaxa.2861.1.1, http://zenodo.org/record/5286352
description: {"references": ["Tovar-Hernandez, M. A. &amp; Salazar-Vallejo, S. I. (2008) Caruncle in Megalomma Johansson, 1925 (Polychaeta: Sabellidae) and the description of a new species from the Eastern Tropical Pacific. Journal of Natural History, 42 (29 - 30), 1951 - 1973."]}