Tulio F. Villalobos-Guerrero | Centro de Investigación Científica y de Educación Superior de Ensenada, BC. (original) (raw)

Papers by Tulio F. Villalobos-Guerrero

Marine biodiversity, Feb 1, 2024

Mediterranean Marine Science, Jul 21, 2023

This study uses morphological and molecular evidence to describe a new intertidal species of Peri... more This study uses morphological and molecular evidence to describe a new intertidal species of Perinereis Kinberg, 1865 (Annelida: Nereididae) from northeast Algeria. Perinereis louizomarum n. sp. belongs to Subgroup 1A, which is distinguished by a single bar-shaped paragnath on area VI of the proboscis and a dorsal ligule that is either slightly or not expanded in the posterior parapodia. The new species differs from P. cultrifera and similar congeners by having a bare area V and slightly enlarged posterior dorsal ligules. Furthermore, using newly generated and mined sequences from online databases, and mined sequences of Perinereis species from online, the analysis of cytochrome c oxidase subunit 1 (COI) mitochondrial gene sequences supported its status as new species. An identification key of the Perinereis species belonging to Subgroup 1A is also provided.

Journal of the Marine Biological Association of the United Kingdom, Mar 1, 2021

The present study reviews Perinereis Group 2 species from the Eastern and South-eastern Asian sea... more The present study reviews Perinereis Group 2 species from the Eastern and South-eastern Asian seas based on morphological analysis of the types, non-types and original descriptions, and the use of molecular evidence (COI and 16S rDNA) from newly collected material. These species are characterized by having two bar-shaped paragnaths on pharyngeal area VI, which are often deemed conical when small and pointed, triggering misidentifications as to Neanthes species. New terminology and definition for this particular type of bars are proposed, and the generic position of some resembling Neanthes species is also re-assessed. Five species are transferred to Perinereis: Perinereis babuzai comb. nov., P. belawanensis comb. nov., P. kinmenensis comb. nov., P. shigungensis comb. nov. and P. vitabunda comb. nov. ‘Perinereis aibuhitensis’ species group is newly proposed by encompassing species having proximal dorsal ligule similar throughout the body, dorsal cirri short, and blades of heterogomph falcigers straight with long terminal tooth forming a distinct tendon. Perinereis belawanensis comb. nov., P. linea and P. vitabunda comb. nov. are redescribed. Perinereis linea is regarded as a senior synonym of Nereis (Neanthes) orientalis and Perinereis vancaurica tetradentata based on type material, whereas its exotic status in the Mediterranean Sea is questioned. An identification key to all currently valid species within Perinereis Group 2 is also provided.

Zootaxa

A new Perinereis Group 2 species is described from the hard clayey mudflats of Gulf of Khambhat, ... more A new Perinereis Group 2 species is described from the hard clayey mudflats of Gulf of Khambhat, Gujarat, India. Perinereis khambhatiensis sp. n. is characterized by having two bar-shaped paragnaths on area VI of proboscis and dorsal ligules not greatly expanded in posterior parapodia. The species can mainly be distinguished from the morphologically similar species P. aibuhitensis (Grube, 1878), P. singaporiensis (Grube, 1878), and P. vancaurica (Ehlers, 1868) by the ridge pattern of areas VI-V-VI, the type of bars on area VI, and the number and distribution of paragnaths chiefly on areas III, IV, and VII–VIII. Two Indian Perinereis varieties originally described from near Gujarat, P. vancaurica var. indica (Bhatt & Bal, 1966) and P. nuntia var. bombayensis (Bhatt & Bal, 1966) are regarded as invalid. Comments on the diagnostic features of species belonging to Perinereis Group 2 are provided and included in a comparative synoptic table to distinguish species. An identification key o...

Journal of Natural History, 2021

ABSTRACT Composetia Hartmann-Schröder, 1985 (Nereididae de Blainville, 1818), to which 51 species... more ABSTRACT Composetia Hartmann-Schröder, 1985 (Nereididae de Blainville, 1818), to which 51 species with broadly heterogeneous characteristics were previously assigned, is reviewed based upon the examination of the type material of the type species, C. costae (Grube, 1840), and seven other species. According to our designation of the lectotype of C. costae, a generic definition of Composetia is established, and taxonomic issues about C. costae are addressed. The current taxonomic status of several species similar to or previously synonymised with C. costae is re-evaluated. Based on the redefinition of Composetia, the taxonomic status of all species previously regarded as Composetia is reassessed. Consequently, three species are moved to two newly established genera based on their type material: Parasetia gen. nov., comprising the single species P. irritabilis (Webster, 1879) comb. nov.; and Potamonereis gen. nov., embracing P. kumensis (Sato, 2020) comb. nov. and P. tokashikiensis (Sato, 2020) comb. nov. Additionally, one species is redescribed and transferred to Leonnates, L. microcephala (Grube, 1878) comb. nov. Ten species currently remain in Composetia, and two of them, C. brasiliensis (McIntosh, 1885) and C. versipedata (Ehlers, 1887), are redescribed. Nereis articulata Ehlers, 1887, previously considered a member of Composetia, has a doubtful identity requiring further investigation. Although the generic placement of many of the remaining species is uncertain, we present our tentative re-evaluations for each of them. Keys are included for identifying all genera similar to Composetia, and for identifying all species within Composetia and Potamonereis gen. nov. https://urn:lsid:zoobank.org:pub:138C70C1-AD64-4D5E-BE0B-761474046715

Marine Biodiversity, 2022

Neanthes galetae Fauchald, 1977 Fig. 2 Neanthes galetae Fau... more Neanthes galetae Fauchald, 1977 Fig. 2 Neanthes galetae Fauchald, 1977: 26–27, fig. 6a–b [type locality: Galeta Island, Colón, Panama]. Neanthes galetae – Wilson 1984: 225 (species list, group IIB). — de León-González et al. 2020: 19 (key). — Villalobos-Guerrero & Idris 2021: 559 (table 1), 561 (table 2). Type material Holotype PANAMA • atokous; Caribbean Sea, Colón, Canal Zone, Galeta Island Reef; 23 Oct. 1970; Smithsonian Tropical Research Institute and A.A. Reimer leg.; intertidal, Laurencia or Acanthophora zones; USNM 53088. Paratypes PANAMA • 2 atokous; same collection data as for holotype; USNM 53089 • 1 atokous; same collection data as for holotype; 9°24′18″ N, 79°51′48.5″ W; Laurencia zone; LACM-AHF Poly 1132. Description COLOUR AND MEASUREMENTS. Holotype atokous, complete, in good condition, 7 (9–14) mm TL, 2.4 (2.5– 4) mm L15, 0.6 (0.6–0.9) mm W15, with 52 (56–58) chaetigers. Body colour yellowish, with greyish pigmentation on distal half of prostomium, cirrophores of anal cirri, and present throughout dorsally and ventrally as a transverse, thin line in anterior margin of segments (Fig. 2A–B). PROSTOMIUM. Pear-shaped, as long as wide (Fig. 2B); anterior end narrow, distally complete; anterolateral gap beside palpophore narrow, three-quarters as wide as antennal diameter; dorsal groove distinct, shallow, running mid-subdistally. Nuchal organs deeply embedded. PALPOPHORES. Ovoid, 1.6 times wider than long (Fig. 2B), as long as half of entire prostomium; with inconspicuous sub-distal transverse groove. Palpostyles ovoid, thick, with diameter as wide as half of palpophore (Fig. 2B). ANTENNAE. Tapered, slender, short, extending forwards to tip of palpophore (Fig. 2B) and posteriorly to one-third length of prostomium; antennae close together, with gap one-quarter as wide as basal diameter of antennae. EYES. Paired eyes blackish, arranged in a trapezoid form; gap between both pairs one-quarter as wide as diameter of posterior pair of eyes (Fig [...]

Genus Perinereis Kinberg, 1865 Perinereis Kinberg, 1865: 17... more Genus Perinereis Kinberg, 1865 Perinereis Kinberg, 1865: 175; 1910: 52. TYPE SPECIES. — Perinereis novaehollandiae Kinberg, 1865, by subsequent designation (Hartman 1949). Currently regarded as a junior synonym of P. amblyodonta Schmarda, 1861 (Ehlers 1904; Hartman 1959), both described from Port Jackson, Sydney, Australia.

Figure 2. Pseudonereis mancorae (Berkeley and Berkeley, 1961) comb. nov. (a–f) holotype (USNM 328... more Figure 2. Pseudonereis mancorae (Berkeley and Berkeley, 1961) comb. nov. (a–f) holotype (USNM 32887); (g–l) paratype (USNM 32888). (a–f) Parapodia, anterior view. (g) Homogomph spiniger, notopodia. (h) Heterogomph spiniger, subacicular neurochaetae, distally broken. (i) Heterogomph falciger, supracicular neurochaetae. (j) Heterogomph falciger, subacicular neurochaetae. (k) Heterogomph falciger, supracicular neurochaetae. (l) Heterogomph falciger, subacicular neurochaetae. Numbers in parapodia and chaetae refer to the chaetiger. Arrows point to base of dorsal cirri. Scale bars: (a) 0.1 mm; (b–f) 0.2 mm; (g,h) 25 µm; (i–l) 10 µm.

Genus Neanthes Kinberg, 1865 Neanthes Kinberg, 1865: 171. T... more Genus Neanthes Kinberg, 1865 Neanthes Kinberg, 1865: 171. Type species Neanthes vaalii Kinberg, 1865, by subsequent designation of Hartman (1954: 27). Remarks The definition of the polyphyletic genus Neanthes introduced earlier by Bakken & Wilson (2005) through morphological phylogenetic analysis of Nereidinae sensu Fitzhugh (1987) and modified by Glasby (2015) and Villalobos-Guerrero & Idris (2021) is followed in the present study. For further details on the current taxonomic situation of the genus, see Davenport et al. (2020) and Villalobos- Guerrero & Idris (2021). The four species here morphologically delimited are still retained in Neanthes considering that genus definition.

Journal of the Marine Biological Association of the United Kingdom, 2021

Journal of Natural History, 2020

ABSTRACT The present study redescribes two closely related species of Pseudonereis Kinberg, 1865 ... more ABSTRACT The present study redescribes two closely related species of Pseudonereis Kinberg, 1865 (Nereididae de Blainville, 1818), P. mancorae (Berkeley & Berkeley, 1961) comb. nov. and P. pseudonoodti (Fauchald, 1977), based on their type specimens collected from the Eastern Tropical Pacific. Pseudonereis mancorae comb. nov. was inappropriately placed in Neanthes but it is herein transferred to Pseudonereis on the basis of the presence of both P-bars and comb-like rows of paragnaths on areas II–IV of pharynx, which are the most reliable features of Pseudonereis. Moreover, P. pseudonoodti was previously incompletely redescribed. These two species are similar but distinguishable by the development of the neuropodial superior lobe, the shape of the heterogomph falcigers in the neuropodia, the colour of aciculae in the parapodia, and the colour and thickness of paragnaths in the pharyngeal rings. An updated list of the 19 valid species of Pseudonereis is also provided.

Oxydromus Grube, 1855 reinstated Oxydromus Grube, 1855: 98. Ophiodromus Sars, 1862: 87; Pleijel, ... more Oxydromus Grube, 1855 reinstated Oxydromus Grube, 1855: 98. Ophiodromus Sars, 1862: 87; Pleijel, 1998: 137-143, figs. 31-33 (synonymy). Type species. Oxydromus fasciatus Grube, 1855, by monotypy. Oxydromus adorsosetosus ( Hartmann-Schröder, 1985), comb. n. (basionym of Ophiodromus adorsosetosus Hartmann-Schröder, 1985) Type locality: Port Lincoln, South Australia. Oxydromus adspersus (Grube, 1874), comb. n. (basionym of Ophiodromus adspersus Grube, 1874) Type locality: Dalmatia, Croatia. Oxydromus agilis (Ehlers, 1864), comb. n. (basionym of Ophiodromus agilis Ehlers, 1864) Type locality: Adriatic Sea. Oxydromus angolaensis ( Hartmann-Schröder, 1974), comb. n. (basionym of Podarke angolaensis Hartmann-Schröder, 1974) Type locality: Lobito, Angola. Oxydromus angustifrons (Grube, 1878), comb. n. (basionym of Irma angustifrons Grube, 1878) Type locality: Philippines. Oxydromus berrisfordi (Day, 1967), comb. n. (basionym of Ophiodromus berrisfordi Day, 1967) Type locality: Walvis Bay, N...

European Journal of Taxonomy

The present study redescribes four species of Neanthes Kinberg, 1865 (Nereididae de Blainville, 1... more The present study redescribes four species of Neanthes Kinberg, 1865 (Nereididae de Blainville, 1818) based on their type specimens collected from different worldwide localities: Neanthes chilkaensis (Southern, 1921) from India, N. galetae (Fauchald, 1977) from Panama, N. helenae (Kinberg, 1865) from St Helena Island, and N. mossambica (Day, 1957) from Mozambique. The morphology of the types was re-examined for the first time after the species were originally described, and incorporated the recent improvements in the standards and terminology for describing nereidid features. The arrangement of paragnaths on area VI stood out among the diagnostic features used to distinguish these four species. Neanthes chilkaensis and N. helenae are the unique nereidids bearing p-bar paragnaths on the area VI. Both species are also distinctive as the former species only exhibited p-bar paragnaths on the area VII–VIII and the latter ventrolateral projections on the apodous segment. Further examinati...

CBM - Cahiers de Biologie Marine, 2021

This is the first record of the Lessepsian polychaete Pseudonereis anomala Gravier, 1899 in the w... more This is the first record of the Lessepsian polychaete Pseudonereis anomala Gravier, 1899 in the western Mediterranean Sea, specifically in Skikda Bay, Algeria. The species was collected among rocks covered by algae at 0.5 m depth. A characterization of the species, as well as some ecological and distributional aspects are provided.

KEY TO SPECIES OF PERINEREIS NUNTIA COMPLEX (ADAPTED FROM Wilson & Glasby 1993... more KEY TO SPECIES OF PERINEREIS NUNTIA COMPLEX (ADAPTED FROM Wilson & Glasby 1993, AND Glasby & Hsieh 2006) This key includes all species regarded as members of the P. nuntia complex (Wilson & Glasby 1993; Glasby & Hsieh 2006), and other species previously regarded as not valid or even excluded. Nevertheless, some species deserve considerations since the broadly different morphological features may suggest that some species belong to a distinct group, but the phylogenetic analysis of the complex would be needed to support this idea. Glasby & Hsieh (2006) already suggested P. akuna, P. caeruleis and P. rhombodonta as possibly not members of the P. nuntia complex by having pyramidal paragnaths on AVI and several rows of small cones separated from larger ones on AVII-VIII. However, P. caeruleis is strikingly different within the P. nuntia complex by also hav...

Perinereis nuntia species complex Perinereis group 3 – Hutc... more Perinereis nuntia species complex Perinereis group 3 – Hutchings et al. 1991: 271. Perinereis nuntia species group – Wilson & Glasby 1993: 259. — Glasby & Hsieh 2006: 558. DIAGNOSIS (MODIFIED AFTER Glasby & Hsieh 2006). — Prostomium with entire anterior margin, anterolateral edges wider than antennal diameter. Antennae present. Two pairs of eyes, anterior pair more widely spaced than posterior pair; lens anterolateral in anterior pair, posterolateral in posterior one. Palpophore with transverse groove present; palpostyles conical. Four pairs of tentacular cirri with distinct cirrophores. Apodous anterior segment, greater than length of chaetiger 1. Eversible pharynx with one pair of jaws, each with two or more canals emerging from pulp cavity. Both rings of pharynx with paragnaths, rarely absent on any of areas. Conical paragnaths on all areas, except AVI with 3-20 shield-shaped or pyramidal-shaped paragnaths on each side in a single row (sometimes few cones present); AIV occasionally with merged paragnaths. AVI-V-VI patterns: λ- shaped, χ- shaped, υ- shaped, or ɔc-shaped. Notopodia with dorsal and median ligules from third parapodia. Dorsal cirri displacing progressively on dorsal ligule. Dorsal ligule similar in size and shape to median ligule throughout body or barely uneven. Notoacicular process present. Neuropodial postchaetal lobe poorly developed, rounded. Neuropodial superior and inferior lobes present at least in anterior parapodia, blunt. Ventral ligule present throughout body. Single ventral cirri throughout body. Notoaciculae and notochaetae on chaetigers 1 and 2, absent, thereafter present. Aciculae black. Notochaeta: homogomph spinigers, present throughout body. Neurochaeta, supracicular fascicle: homogomph spinigers and heterogomph falcigers, both present throughout body. Neurochaeta, subacicular fascicle: heterogomph spinigers present at least in median and posterior chaetigers, heterogomph falcigers present throughout body (homogomph spinigers rarely presen [...]

Alitta acutifolia (Ehlers, 1901), reinst., n. comb. Figures 1 D −I, 3 <i&gt... more Alitta acutifolia (Ehlers, 1901), reinst., n. comb. Figures 1 D −I, 3 Nereis acutifolia Ehlers, 1901: 118 −121, Pl. 13, Figs. 1 −12; Hartwich 1993: 75 (partim). Neanthes succinea Rioja 1947: 203; 1962: 165; Hartmann-Schröder 1959: 142; de León-González & Solís-Weiss 2000: 556; Dean 2001: 51 −52, Figs. 30−33 (partim); Ferrando & Méndez 2010: 3 (non Leuckart, 1847). Alitta succinea Tovar-Hernández et al. 2012: 8 −9 (only diagnosis and figures); Villalobos-Guerrero 2012: 131−165, Figs. 1 −5, 7 (only issues and figures related to samples from Sinaloa); Villalobos-Guerrero & Tovar-Hernández 2014: 65 −66 (only variations and habitat, non Leuckart, 1847). Type material. Tropical Eastern Pacific, Guatemala. Three syntypes of Nereis acutifolia (ZMB 6733), labeled " Salvador, west coast of Guatemala ", collected by Dr. Krefft (Ehlers 1901: 121), no more data. Measurements of syntypes are as follows: one complete atokous specimen with 78 chaetigers, TL= 22 mm, L 15 = 7.6 mm, W 15 = 1.4 mm; one incomplete atokous female fragmented into two pieces with 76 chaetigers, TL= 40 mm, L 15 = 14 mm, W 15 = 2.5 mm; and one complete epitokous male with 84 chaetigers, TL= 12 mm, L 15 = 5 mm, W 15 = 1.5 mm. Additional material. Tropical Eastern Pacific, Costa Rica. ECOSUR-OH-P 709 -718, 10 specimens, Puntarenas, 9 ° 58 ' 27.35 ''N, 84 ° 49 ' 52.71 ''W, 22 Nov 2012, among barnacles, anemones and mytilids on concrete dock pilings, col. T. Villalobos. Gulf of California. ECOSUR-P2731, 12 specimens, Guaymas, Sonora, 27 ° 54 '02.5''N, 110 ° 51 ' 15.8 ''W, 11 Aug 2011, fouling on buoy, col. T. Villalobos & J. Aguilar. ECOSUR-P2732, 15 specimens, Topolobampo, Sinaloa, 25 ° 35 ' 33.4 ''N, 109 °04'04.9''W, fouling on buoys, 0 9 Aug 2011, col. J. Aguilar & I. Ramírez. ECOSUR-P2733, 26 specimens, slaughterhouse, Urías estuary, Mazatlán, Sinaloa, 23 º 12 ' 38.1 ''N, 106 º 22 ' 36 ''W, metallic buoy, 0 3 Jun 2008, col. M. Tovar. ECOSUR-P2734 [...]