Exploring evolutionary trends within the Pennellidae (Copepoda: Siphonostomatoida) using molecular data

Reports of Pennellidae Burmeister, 1835 (Copepoda: Siphonostomatoida) post metamorphosed females off the coast of southern Africa

“…Phylogenetic estimation of some pennellid species (see Fig. 2 , Clade III in Yumura et al ( 2022 )) estimates L . hemirhamphi basal to a sister grouping of Pennella sp.…”

“…scopeli (Genbank accession nr OR807153 - 365bp) with representatives of Caligidae Burmeister, 1835 ( Caligus curtus Müller O.F., 1785 and C . elongates von Nordmann, 1832) as outgroup taxa according to Yumura et al ( 2022 ) and Osuna-Cabanillas et al ( 2023 ). Sequences were aligned with Clustal X 2.1 (Thompson et al, 1997 ) and converted to amino acids using MacClade (Maddison & Maddison, 2001 ).…”

The First Report of Pennella (Crustacea: Copepoda) Infesting Stenella coeruleoalba Stranded in Malta: Morphological and Genetic Analyses

“…Instead, the main distinguishing feature may be the definitive host specificity rather than the actual parasites' specific morphology [2]. However, while definitive host specificity may at times be an effective tool in discriminating between parasites, as some parasites tend to exhibit species-specific ecological interactions [2,35,36], in this case, the molecular data, namely those from DNA barcoding, indicated otherwise [5,7]. Our comparative genetic analyses showed that the currently studied specimen's COI data represent a newly sequenced DNA barcode that closely matches both P. balaenoptera and P. filosa.…”

A New Species and a New Genus of the Family Pennellidae (Copepoda: Siphonostomatoida) Parasitic on North Pacific Lightfish <i>Maurolicus japonicus</i> (Actinopterygii: Stomiiformes: Sternoptychidae) Collected from Suruga Bay, Japan

“…Bodies of adult females of copepods belonging to the family Pennellidae are highly modified which makes the phylogenetic relationships of pennellid genera ambiguous (Boxshall 1986;Boxshall and Halsey 2004;Yumura et al 2022). The majority of the genera (Allotrifur Yamaguti, 1963, Cardiodectes Wilson, 1917, Creopelates Shiino, 1958, Haemobaphes Steenstrup and Lütken, 1861, Impexus Kabata, 1972, Lernaeenicus Lesueur, 1824, Lernaeocera Blainville, 1822, Lernaeolophus Heller, 1865, Nagasawanus Uyeno, 2015, Ophiolernaea Shiino, 1958, Pennella Oken, 1815, Peroderma Heller, 1865, Phrixocephalus Wilson, 1908, Protosarcotretes Ohtsuka, Lindsay, and Izawa, 2018, Sarcotretes Jungersen, 1911, Serpentisaccus Blasiola, 1979, and Trifur Wilson, 1917 are mesoparasitic, with the anterior part of the body (to the dominant number of somites) embedded in the host tissues and the posterior part exposed to the water (Kabata 1976;Piasecki 2022).…”